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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9801054 | Jiri Podolsky | J. Podolsky, K. Vesely | New examples of sandwich gravitational waves and their impulsive limit | 9 pages, to be published in Czech. J. Phys | Czech.J.Phys. 48 (1998) 871-878 | 10.1023/A:1022869004605 | KTF MFF UK JP2 | gr-qc | null | Non-standard sandwich gravitational waves are constructed from the
homogeneous pp vacuum solution and the motions of free test particles in the
space-times are calculated explicitly. They demonstrate the caustic property of
sandwich waves. By performing limits to impulsive gravitational wave it is
demonstrated that t... | [
{
"created": "Thu, 15 Jan 1998 15:22:27 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Podolsky",
"J.",
""
],
[
"Vesely",
"K.",
""
]
] | Non-standard sandwich gravitational waves are constructed from the homogeneous pp vacuum solution and the motions of free test particles in the space-times are calculated explicitly. They demonstrate the caustic property of sandwich waves. By performing limits to impulsive gravitational wave it is demonstrated that the... |
1908.06220 | Jose Edgar Madriz Aguilar Dr. | Jos\'e Edgar Madriz Aguilar, J. Zamarripa, M. Montes, C. Romero | Higgs inflation in complex geometrical scalar-tensor theory of gravity | 7 pages, no figures | Physics of the Dark Universe 28 (2020) 100480 | 10.1016/j.dark.2020.100480 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a Higgs inflationary model in the context of a complex geometrical
scalar-tensor theory of gravity. In this model the Higgs inflaton scalar field
has geometrical origin playing the role of the Weyl scalar field in the
original non-riemannian background geometry. The energy scale enough to
generate inflation... | [
{
"created": "Sat, 17 Aug 2019 01:26:00 GMT",
"version": "v1"
}
] | 2020-07-14 | [
[
"Aguilar",
"José Edgar Madriz",
""
],
[
"Zamarripa",
"J.",
""
],
[
"Montes",
"M.",
""
],
[
"Romero",
"C.",
""
]
] | We derive a Higgs inflationary model in the context of a complex geometrical scalar-tensor theory of gravity. In this model the Higgs inflaton scalar field has geometrical origin playing the role of the Weyl scalar field in the original non-riemannian background geometry. The energy scale enough to generate inflation f... |
gr-qc/0702014 | Plamen Fiziev | Plamen P. Fiziev | Exact Solutions of Regge-Wheeler Equation | 13 pages, 8 figures, latex file. Talk given at XXIV Spanish
Relativity Meeting E.R.E. 2006, to appear in Journal of Physics, Conference
Series | J.Phys.Conf.Ser.66:012016,2007 | 10.1088/1742-6596/66/1/012016 | SU-TH0207 | gr-qc | null | The Regge-Wheeler equation describes the axial perturbations of Schwarzschild
metric in linear approximation. We present its exact solutions in terms of the
confluent Heun's functions, the basic properties of the general solution, novel
analytical approach and numerical techniques for study of different boundary
prob... | [
{
"created": "Fri, 2 Feb 2007 18:49:37 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Fiziev",
"Plamen P.",
""
]
] | The Regge-Wheeler equation describes the axial perturbations of Schwarzschild metric in linear approximation. We present its exact solutions in terms of the confluent Heun's functions, the basic properties of the general solution, novel analytical approach and numerical techniques for study of different boundary proble... |
1701.07132 | Hwa-Tung Nieh | H.T. Nieh | Torsion and Gauge Invariance in Maxwell-Dirac Electrodynamics | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been known for a long time that the presence of torsion is in conflict
with gauge invariance of the the electromagnetic field in curved Riemann-Cartan
space if the Maxwell field is minimally coupled to the curved gravitational
space through the covariant derivative. In search for a possible solution, we
consid... | [
{
"created": "Wed, 25 Jan 2017 01:41:08 GMT",
"version": "v1"
},
{
"created": "Sat, 28 Jan 2017 05:58:18 GMT",
"version": "v2"
}
] | 2017-01-31 | [
[
"Nieh",
"H. T.",
""
]
] | It has been known for a long time that the presence of torsion is in conflict with gauge invariance of the the electromagnetic field in curved Riemann-Cartan space if the Maxwell field is minimally coupled to the curved gravitational space through the covariant derivative. In search for a possible solution, we consider... |
0711.4209 | Yakov Itin | Yakov Itin (Institute of Mathematics, Hebrew University of Jerusalem,
and Jerusalem College of Technology) | Coframe geometry and gravity | to be published in "Classical and Quantum Gravity Research Progress",
Nova Science Publishers, Inc | null | null | null | gr-qc | null | The possible extensions of GR for description of fermions on a curved space,
for supergravity and for loop quantum gravity require a richer set of 16
independent variables. These variables can be assembled in a coframe field,
i.e., a local set of four linearly independent 1-forms. In the ordinary
formulation, the cof... | [
{
"created": "Tue, 27 Nov 2007 10:07:24 GMT",
"version": "v1"
}
] | 2019-08-12 | [
[
"Itin",
"Yakov",
"",
"Institute of Mathematics, Hebrew University of Jerusalem,\n and Jerusalem College of Technology"
]
] | The possible extensions of GR for description of fermions on a curved space, for supergravity and for loop quantum gravity require a richer set of 16 independent variables. These variables can be assembled in a coframe field, i.e., a local set of four linearly independent 1-forms. In the ordinary formulation, the cofra... |
1601.08230 | Mikhail Volkov | Mikhail S. Volkov | Hairy black holes in the XX-th and XXI-st centuries | 20 pages, rapporteur article for the MG14 section on hairy black
holes | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is a brief summary of the most important hairy black hole solutions in
3+1 spacetime dimensions discovered over the last 25 years. These were first of
all the Einstein-Yang-Mills black holes and their various generalizations
including the Higgs field, the dilaton and the curvature corrections, and also
the Skyrm... | [
{
"created": "Fri, 29 Jan 2016 19:52:22 GMT",
"version": "v1"
}
] | 2016-02-01 | [
[
"Volkov",
"Mikhail S.",
""
]
] | This is a brief summary of the most important hairy black hole solutions in 3+1 spacetime dimensions discovered over the last 25 years. These were first of all the Einstein-Yang-Mills black holes and their various generalizations including the Higgs field, the dilaton and the curvature corrections, and also the Skyrme ... |
gr-qc/0403086 | Daniel M\"uller | Daniel Muller | Casimir Effect in Compact Universes | 16 pages, 8 figures, Invited talk at the Theoretical Cosmology
section of the Tenth Marcel Grossmann Meeting on General Relativity, Rio de
Janeiro, Brazil, 20-26 July, 2003 | null | 10.1142/9789812704030_0175 | null | gr-qc | null | The Casimir effect in compact hyperbolic Universes was numerically obtained
in previous publications. In this talk, I expose these results.
| [
{
"created": "Fri, 19 Mar 2004 23:43:41 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Muller",
"Daniel",
""
]
] | The Casimir effect in compact hyperbolic Universes was numerically obtained in previous publications. In this talk, I expose these results. |
1310.5333 | Alexei Zayats | Alexander B. Balakin, Ruslan K. Muharlyamov, Alexei E. Zayats | Electromagnetic waves in an axion-active relativistic plasma
non-minimally coupled to gravity | 19 pages, 9 figures, published version | Eur. Phys. J. C 73: 2647, 2013 | 10.1140/epjc/s10052-013-2647-8 | null | gr-qc astro-ph.CO hep-th physics.plasm-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider cosmological applications of a new self-consistent system of
equations, accounting for a nonminimal coupling of the gravitational,
electromagnetic and pseudoscalar (axion) fields in a relativistic plasma. We
focus on dispersion relations for electromagnetic perturbations in an initially
isotropic ultrarel... | [
{
"created": "Sun, 20 Oct 2013 14:29:45 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Nov 2013 15:37:55 GMT",
"version": "v2"
}
] | 2013-12-17 | [
[
"Balakin",
"Alexander B.",
""
],
[
"Muharlyamov",
"Ruslan K.",
""
],
[
"Zayats",
"Alexei E.",
""
]
] | We consider cosmological applications of a new self-consistent system of equations, accounting for a nonminimal coupling of the gravitational, electromagnetic and pseudoscalar (axion) fields in a relativistic plasma. We focus on dispersion relations for electromagnetic perturbations in an initially isotropic ultrarelat... |
1412.0010 | Ettore Minguzzi | E. Minguzzi | Special relativity as the limit of an Aristotelian universal friction
theory under Reye's assumption | 19 pages | null | null | null | gr-qc physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work explores a classical mechanical theory under two further
assumptions: (a) there is a universal dry friction force (Aristotelian
mechanics), and (b) the variation of the mass of a body due to wear is
proportional to the work done by the friction force on the body (Reye's
hypothesis). It is shown that mass de... | [
{
"created": "Fri, 28 Nov 2014 12:01:43 GMT",
"version": "v1"
}
] | 2014-12-02 | [
[
"Minguzzi",
"E.",
""
]
] | This work explores a classical mechanical theory under two further assumptions: (a) there is a universal dry friction force (Aristotelian mechanics), and (b) the variation of the mass of a body due to wear is proportional to the work done by the friction force on the body (Reye's hypothesis). It is shown that mass depe... |
1702.01110 | Andrea Maselli | Andrea Maselli, Kostas Kokkotas, Pablo Laguna | Observing binary black hole ringdowns by advanced gravitational wave
detectors | Third generation of detectors included in the analysis and Improved
discussion of the results. Accepted for publication on PRD | Phys. Rev. D 95, 104026 (2017) | 10.1103/PhysRevD.95.104026 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The direct discovery of gravitational waves from compact binary systems leads
for the first time to explore the possibility of black hole spectroscopy. Newly
formed black holes produced by coalescing events are copious emitters of
gravitational radiation, in the form of damped sinusoids, the quasi normal
modes. The l... | [
{
"created": "Fri, 3 Feb 2017 18:49:26 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Apr 2017 07:37:52 GMT",
"version": "v2"
}
] | 2017-05-24 | [
[
"Maselli",
"Andrea",
""
],
[
"Kokkotas",
"Kostas",
""
],
[
"Laguna",
"Pablo",
""
]
] | The direct discovery of gravitational waves from compact binary systems leads for the first time to explore the possibility of black hole spectroscopy. Newly formed black holes produced by coalescing events are copious emitters of gravitational radiation, in the form of damped sinusoids, the quasi normal modes. The lat... |
1003.4584 | Alexei Zayats | Alexander B. Balakin, Jos\'e P. S. Lemos, Alexei E. Zayats | Nonminimal coupling for the gravitational and electromagnetic fields:
Traversable electric wormholes | 15 pages, 9 figures | Phys.Rev.D81:084015,2010 | 10.1103/PhysRevD.81.084015 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss new exact solutions of a three-parameter nonminimal
Einstein-Maxwell model. The solutions describe static spherically symmetric
objects with and without center, supported by an electric field nonminimally
coupled to gravity. We focus on a unique one-parameter model, which admits an
exact solution for a tra... | [
{
"created": "Wed, 24 Mar 2010 06:49:48 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Apr 2010 19:53:26 GMT",
"version": "v2"
}
] | 2010-04-16 | [
[
"Balakin",
"Alexander B.",
""
],
[
"Lemos",
"José P. S.",
""
],
[
"Zayats",
"Alexei E.",
""
]
] | We discuss new exact solutions of a three-parameter nonminimal Einstein-Maxwell model. The solutions describe static spherically symmetric objects with and without center, supported by an electric field nonminimally coupled to gravity. We focus on a unique one-parameter model, which admits an exact solution for a trave... |
1309.7332 | Massimiliano Rinaldi | Massimiliano Rinaldi | The dark aftermath of Higgs inflation | Matches the version accepted by EPJ+ | Eur. Phys. J. Plus (2014) 129: 56 | 10.1140/epjp/i2014-14056-8 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter we study the dynamics of the late Universe when a nonminimally
coupled Higgs field is present. In general, the nonminimal coupling leads to a
nontrivial mixing between the gravitational degrees of freedom and the
Goldstone massless bosons. We know that this is irrelevant during the
inflationary phase. ... | [
{
"created": "Fri, 27 Sep 2013 18:55:32 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Oct 2013 10:30:03 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Nov 2013 14:26:46 GMT",
"version": "v3"
},
{
"created": "Mon, 13 Jan 2014 18:01:14 GMT",
"version": "v4"
},
{
"cr... | 2014-03-31 | [
[
"Rinaldi",
"Massimiliano",
""
]
] | In this letter we study the dynamics of the late Universe when a nonminimally coupled Higgs field is present. In general, the nonminimal coupling leads to a nontrivial mixing between the gravitational degrees of freedom and the Goldstone massless bosons. We know that this is irrelevant during the inflationary phase. In... |
2005.13957 | Celia Escamilla-Rivera | Celia Escamilla-Rivera, A. Hern\'andez-Almada, Miguel A.
Garc\'ia-Aspeitia and V. Motta | Linear perturbations spectra for dynamical dark energy inspired by
modified gravity | 8 pages, 3 figures, 2 tables. Version accepted for publication in the
International Journal of Modern Physics D | International Journal of Modern Physics D 2021 | 10.1142/S0218271821500772 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study a particular modified gravity Equation of State, the
so-called Jaime-Jaber-Escamilla, that emerges from the first gravity modified
action principle and can reproduce three cosmological viable $f(R)$ theories:
the Starobinsky, Hu-Sawicki, and Exponential models . This EoS is a suitable
candidat... | [
{
"created": "Tue, 26 May 2020 00:39:53 GMT",
"version": "v1"
},
{
"created": "Thu, 27 May 2021 16:05:18 GMT",
"version": "v2"
}
] | 2021-07-07 | [
[
"Escamilla-Rivera",
"Celia",
""
],
[
"Hernández-Almada",
"A.",
""
],
[
"García-Aspeitia",
"Miguel A.",
""
],
[
"Motta",
"V.",
""
]
] | In this paper, we study a particular modified gravity Equation of State, the so-called Jaime-Jaber-Escamilla, that emerges from the first gravity modified action principle and can reproduce three cosmological viable $f(R)$ theories: the Starobinsky, Hu-Sawicki, and Exponential models . This EoS is a suitable candidate ... |
gr-qc/9710045 | Georges Bressange | C. Barrab\`es, G.F Bressange and P.A. Hogan | Colliding Plane Waves in Einstein-Maxwell Theory | 3 pages, TeX, no figures, to appear in Lett. Math. Phys | Lett.Math.Phys. 43 (1998) 263-265 | null | null | gr-qc | null | Recently a simple solution of the vacuum Einstein-Maxwell field equations was
given describing a plane electromagnetic shock wave sharing its wave front with
a plane gravitational impulse wave. We present here an exact solution of the
vacuum Einstein-Maxwell field equations describing the head-on collision of
such a ... | [
{
"created": "Wed, 8 Oct 1997 09:20:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Barrabès",
"C.",
""
],
[
"Bressange",
"G. F",
""
],
[
"Hogan",
"P. A.",
""
]
] | Recently a simple solution of the vacuum Einstein-Maxwell field equations was given describing a plane electromagnetic shock wave sharing its wave front with a plane gravitational impulse wave. We present here an exact solution of the vacuum Einstein-Maxwell field equations describing the head-on collision of such a wa... |
gr-qc/0210070 | Jerzy Matyjasek | Jerzy Matyjasek | Quantized massive scalar fields in the spacetime of a charged dilatonic
black hole | 16 pages, 4 figures | Acta Phys.Polon. B34 (2003) 3921-3946 | null | null | gr-qc | null | Employing the approximate effective action constructed from the coincidence
limit of the Hadamard-Minakshisundaram-DeWitt (HaMiDeW) coefficient a_{3}, the
renormalized stress-energy tensor of the quantized massive scalar field in the
spacetime of a static and electrically charged dilatonic black hole is
calculated. S... | [
{
"created": "Sun, 20 Oct 2002 19:20:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Matyjasek",
"Jerzy",
""
]
] | Employing the approximate effective action constructed from the coincidence limit of the Hadamard-Minakshisundaram-DeWitt (HaMiDeW) coefficient a_{3}, the renormalized stress-energy tensor of the quantized massive scalar field in the spacetime of a static and electrically charged dilatonic black hole is calculated. Spe... |
1412.4250 | Oleg Zaslavskii | O. B. Zaslavskii | Ultra-high energy collisions in static space-times: single versus
multi-black hole cases | 18 pages. Essentially expanded, presentation improved. To appear in
GRG | Gen. Rel. and Gravitation 47 (2015) 50 | 10.1007/s10714-015-1894-4 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider collision of two particles near static electrically charged
extremal black holes and elucidate the conditions under which the energy in the
centre of mass frame E_{c.m.} grows unbounded. For a single black hole, we
generalize the results obtained earlier for the Reissner-Nordstr\"om metric, to
distorted b... | [
{
"created": "Sat, 13 Dec 2014 16:14:28 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Mar 2015 20:39:38 GMT",
"version": "v2"
}
] | 2015-04-10 | [
[
"Zaslavskii",
"O. B.",
""
]
] | We consider collision of two particles near static electrically charged extremal black holes and elucidate the conditions under which the energy in the centre of mass frame E_{c.m.} grows unbounded. For a single black hole, we generalize the results obtained earlier for the Reissner-Nordstr\"om metric, to distorted bla... |
2107.00702 | Alessandro Fabbri | Roberto Balbinot and Alessandro Fabbri | Quantum correlations across the horizon in acoustic and gravitational
Black Holes | 35 pages, 16 figures. Final version | Phys. Rev. D105, 045010 (2022) | 10.1103/PhysRevD.105.045010 | null | gr-qc cond-mat.quant-gas hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate, within the framework of Quantum Field Theory in curved space,
the correlations across the horizon of a black hole in order to highlight the
particle-partner pair creation mechanism at the origin of Hawking radiation.
The analysis concerns both acoustic black holes, formed by Bose-Einstein
condensates,... | [
{
"created": "Thu, 1 Jul 2021 19:02:34 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Feb 2022 12:44:51 GMT",
"version": "v2"
}
] | 2022-02-17 | [
[
"Balbinot",
"Roberto",
""
],
[
"Fabbri",
"Alessandro",
""
]
] | We investigate, within the framework of Quantum Field Theory in curved space, the correlations across the horizon of a black hole in order to highlight the particle-partner pair creation mechanism at the origin of Hawking radiation. The analysis concerns both acoustic black holes, formed by Bose-Einstein condensates, a... |
1908.09842 | Kyriakos Destounis | Kyriakos Destounis, Rodrigo D. B. Fontana, Filipe C. Mena, Eleftherios
Papantonopoulos | Strong Cosmic Censorship in Horndeski Theory | 21 pages, 5 figures, to appear in JHEP | JHEP10(2019)280 | 10.1007/JHEP10(2019)280 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The strong cosmic censorship hypothesis has recently regained a lot of
attention in charged and rotating black holes immersed in de Sitter space.
Although the picture seems to be clearly leaning towards the validity of the
hypothesis in Kerr-de Sitter geometries, Reissner-Nordstr\"{o}m-de Sitter black
holes appear to... | [
{
"created": "Mon, 26 Aug 2019 18:00:03 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Aug 2019 15:56:19 GMT",
"version": "v2"
},
{
"created": "Wed, 16 Oct 2019 16:24:06 GMT",
"version": "v3"
}
] | 2019-11-04 | [
[
"Destounis",
"Kyriakos",
""
],
[
"Fontana",
"Rodrigo D. B.",
""
],
[
"Mena",
"Filipe C.",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
]
] | The strong cosmic censorship hypothesis has recently regained a lot of attention in charged and rotating black holes immersed in de Sitter space. Although the picture seems to be clearly leaning towards the validity of the hypothesis in Kerr-de Sitter geometries, Reissner-Nordstr\"{o}m-de Sitter black holes appear to b... |
1807.07234 | Hideki Asada | Yuki Hagihara, Naoya Era, Daisuke Iikawa, Hideki Asada | Probing gravitational wave polarizations with Advanced LIGO, Advanced
Virgo and KAGRA | 14 pages, 4 figures, Figure 4 is replaced, added one paragraph about
why the specific sky positions are O(100), accepted by PRD | Phys. Rev. D 98, 064035 (2018) | 10.1103/PhysRevD.98.064035 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Assuming that, for a given source of gravitational waves (GWs), we know its
sky position, as is the case of GW events with an electromagnetic counterpart
such as GW170817, we discuss a null stream method to probe GW polarizations
including spin-0 (scalar) GW modes and spin-1 (vector) modes, especially with
an expecte... | [
{
"created": "Thu, 19 Jul 2018 04:11:43 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Sep 2018 06:47:27 GMT",
"version": "v2"
}
] | 2018-09-26 | [
[
"Hagihara",
"Yuki",
""
],
[
"Era",
"Naoya",
""
],
[
"Iikawa",
"Daisuke",
""
],
[
"Asada",
"Hideki",
""
]
] | Assuming that, for a given source of gravitational waves (GWs), we know its sky position, as is the case of GW events with an electromagnetic counterpart such as GW170817, we discuss a null stream method to probe GW polarizations including spin-0 (scalar) GW modes and spin-1 (vector) modes, especially with an expected ... |
1901.10851 | Juan Mena-Fern\'andez | Juan Mena-Fern\'andez and Luis Manuel Gonz\'alez-Romero | Reconstruction of the neutron star equation of state from
$w$-quasinormal modes spectra with a piecewise polytropic meshing and
refinement method | 20 pages, 18 figures | Phys. Rev. D 99, 104005 (2019) | 10.1103/PhysRevD.99.104005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we present a new approach to the inverse problem for
relativistic stars using quasinormal modes and the piecewise polytropic
parametrization of the equation of state. The algorithm is a piecewise
polytropic meshing and refinement method that reconstructs the neutron star
equation of state from experimen... | [
{
"created": "Wed, 30 Jan 2019 14:33:17 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Apr 2019 11:58:00 GMT",
"version": "v2"
},
{
"created": "Thu, 9 May 2019 10:01:35 GMT",
"version": "v3"
}
] | 2019-05-10 | [
[
"Mena-Fernández",
"Juan",
""
],
[
"González-Romero",
"Luis Manuel",
""
]
] | In this paper we present a new approach to the inverse problem for relativistic stars using quasinormal modes and the piecewise polytropic parametrization of the equation of state. The algorithm is a piecewise polytropic meshing and refinement method that reconstructs the neutron star equation of state from experimenta... |
1008.1028 | Abd El Fady Morcos | M.I. Wanas, A.B. Morcos and S.I. El Gammal | Lense-Thirring Field and the Solar Limb Effect | 7 pages conference | First Middle East and Aerica IAU- Regional Meeting Proceeding
MEARIM No.1,2008 | 10.1017/977403330200102 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Solar-Limb Effect is an observational phenomena connected to the solar
gravitational red-shift. It shows a variation of the magnitude of the
gravitational red-shift from the center to the limb of the solar disc. In the
present work an attempt, for interpreting this phenomena using a general
relativistic red-shift for... | [
{
"created": "Thu, 5 Aug 2010 17:35:57 GMT",
"version": "v1"
}
] | 2010-08-06 | [
[
"Wanas",
"M. I.",
""
],
[
"Morcos",
"A. B.",
""
],
[
"Gammal",
"S. I. El",
""
]
] | Solar-Limb Effect is an observational phenomena connected to the solar gravitational red-shift. It shows a variation of the magnitude of the gravitational red-shift from the center to the limb of the solar disc. In the present work an attempt, for interpreting this phenomena using a general relativistic red-shift formu... |
1511.08281 | Liu Zhao | Xin Hao, Bin Wu and Liu Zhao | Fluids and vortex from constrained fluctuations around C-metric black
hole | 19 pages, LaTeX. v2: added a new reference. v3: major revision | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By foliating the four-dimensional C-metric black hole spacetime, we consider
a kind of initial-value-like formulation of the vacuum Einstein's equation, the
holographic initial data is a double consisting of the induced metric and the
Brown-York energy momentum tensor on an arbitrary initial hypersurface. Then by
per... | [
{
"created": "Thu, 26 Nov 2015 03:33:27 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Dec 2015 01:36:24 GMT",
"version": "v2"
},
{
"created": "Thu, 6 Apr 2017 01:03:50 GMT",
"version": "v3"
}
] | 2017-04-07 | [
[
"Hao",
"Xin",
""
],
[
"Wu",
"Bin",
""
],
[
"Zhao",
"Liu",
""
]
] | By foliating the four-dimensional C-metric black hole spacetime, we consider a kind of initial-value-like formulation of the vacuum Einstein's equation, the holographic initial data is a double consisting of the induced metric and the Brown-York energy momentum tensor on an arbitrary initial hypersurface. Then by pertu... |
1310.8495 | Muhammad Zaeem Ul Haq Bhatti | M. Sharif and M. Zaeem Ul Haq Bhatti | Structure Scalars In Charged Plane Symmetry | 12 pages | Mod. Phys. Lett A 27(2012)1250141 | 10.1142/S0217732312501416 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider non-adiabatic flow of the fluid possessing dissipation in the
form of shearing viscosity in electromagnetic field. The scalar functions
(structure scalars) for charged plane symmetry are formulated and are related
with the physical variables of the fluid. We also develop a relationship
between the Weyl te... | [
{
"created": "Wed, 30 Oct 2013 14:52:09 GMT",
"version": "v1"
}
] | 2013-11-01 | [
[
"Sharif",
"M.",
""
],
[
"Bhatti",
"M. Zaeem Ul Haq",
""
]
] | We consider non-adiabatic flow of the fluid possessing dissipation in the form of shearing viscosity in electromagnetic field. The scalar functions (structure scalars) for charged plane symmetry are formulated and are related with the physical variables of the fluid. We also develop a relationship between the Weyl tens... |
gr-qc/9411043 | Sathyaprakash | B. S. Sathyaprakash | Filtering post-Newtonian gravitational waves from coalescing binaries | 5 pages, revtex, 2 figures available upon request | Phys.Rev.D50:7111-7115,1994 | 10.1103/PhysRevD.50.R7111 | IUCAA-18/94 | gr-qc | null | Gravitational waves from inspiralling binaries are expected to be detected
using a data analysis technique known as {\it matched filtering.} This
technique is applicable whenever the form of the signal is known accurately.
Though we know the form of the signal precisely, we will not know {\it a
priori} its parameters... | [
{
"created": "Tue, 15 Nov 1994 19:33:35 GMT",
"version": "v1"
}
] | 2010-01-06 | [
[
"Sathyaprakash",
"B. S.",
""
]
] | Gravitational waves from inspiralling binaries are expected to be detected using a data analysis technique known as {\it matched filtering.} This technique is applicable whenever the form of the signal is known accurately. Though we know the form of the signal precisely, we will not know {\it a priori} its parameters. ... |
gr-qc/0008055 | Burinskii A. Ya. | Alexander Burinskii (Russian Academy of Sciences, Moscow) and Giulio
Magli (Dipartimento di Matematica del Politecnico di Milano) | Twisting Lightlike Solutions of the Kerr-Schild Class | 4 pages, Latex, talk given at the session GT4 of the MG9 Meeting (
Rome, 2-9 July, 2000), submitted to the Proceedings of MG9 | null | null | null | gr-qc hep-ph | null | Using a complex representation of the Debney-Kerr-Schild (DKS) solutions and
the Kerr theorem we give a method to construct boosted Kerr geometries. In the
ultrarelativistic case this method yelds twisting solutions having, contrary to
the known pp-wave limiting solutions, a non-zero value of the total angular
moment... | [
{
"created": "Tue, 22 Aug 2000 12:41:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Burinskii",
"Alexander",
"",
"Russian Academy of Sciences, Moscow"
],
[
"Magli",
"Giulio",
"",
"Dipartimento di Matematica del Politecnico di Milano"
]
] | Using a complex representation of the Debney-Kerr-Schild (DKS) solutions and the Kerr theorem we give a method to construct boosted Kerr geometries. In the ultrarelativistic case this method yelds twisting solutions having, contrary to the known pp-wave limiting solutions, a non-zero value of the total angular momentum... |
1510.01183 | Otakar Svitek | T. Tahamtan and O. Svitek | Robinson--Trautman solution with nonlinear electrodynamics | 7 figures, to appear in EPJC | Eur. Phys. J. C 76 (2016) 335 | 10.1140/epjc/s10052-016-4175-9 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Explicit Robinson--Trautman solutions with electromagnetic field satisfying
nonlinear field equations are derived and analyzed. The solutions are generated
from the spherically symmetric ones. In all cases the electromagnetic field
singularity is removed while the gravitational one persists. The models
resolving curv... | [
{
"created": "Mon, 5 Oct 2015 15:16:05 GMT",
"version": "v1"
},
{
"created": "Fri, 20 May 2016 17:37:16 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Jun 2016 17:28:10 GMT",
"version": "v3"
}
] | 2016-08-26 | [
[
"Tahamtan",
"T.",
""
],
[
"Svitek",
"O.",
""
]
] | Explicit Robinson--Trautman solutions with electromagnetic field satisfying nonlinear field equations are derived and analyzed. The solutions are generated from the spherically symmetric ones. In all cases the electromagnetic field singularity is removed while the gravitational one persists. The models resolving curvat... |
1204.6709 | S. I. Kruglov | S. I. Kruglov | On exponential modified gravity | 20 pages, 9 figures, changed title, extended version, added a
section, figures and references, to be published in IJMPA | Int. J. Mod. Phys.A, Vol.28 (2013), 13501194 | 10.1142/S0217751X13501194 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A modified theory of gravity with the function $F(R) = R\exp(\alpha R)$
instead of Ricci scalar $R$ in the Einstein$-$Hilbert action is considered and
analyzed. The action of the model is converted into Einstein$-$Hilbert action
at small value of the parameter $\alpha$. From local tests we obtain a bound on
the param... | [
{
"created": "Fri, 27 Apr 2012 18:59:13 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Aug 2013 15:23:39 GMT",
"version": "v2"
}
] | 2013-09-30 | [
[
"Kruglov",
"S. I.",
""
]
] | A modified theory of gravity with the function $F(R) = R\exp(\alpha R)$ instead of Ricci scalar $R$ in the Einstein$-$Hilbert action is considered and analyzed. The action of the model is converted into Einstein$-$Hilbert action at small value of the parameter $\alpha$. From local tests we obtain a bound on the paramet... |
1305.0308 | Alain Ulacia Rey | I. Delgado Gaspar, A. Perez Martinez, Roberto A. Sussman and A. Ulacia
Rey | Gravitational collapse of a magnetized fermion gas with finite
temperature | 9 pages, 7 figures. arXiv admin note: substantial text overlap with
arXiv:1211.5980 | European Journal of Physics C, 73, 2502, (2013) | 10.1140/epjc/s10052-013-2502-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the dynamics of a self--gravitating magnetized electron gas at
finite temperature near the collapsing singularity of a Bianchi-I spacetime.
Considering a general and appropriate and physically motivated initial
conditions, we transform Einstein--Maxwell field equations into a complete and
self--consistent ... | [
{
"created": "Wed, 1 May 2013 22:31:28 GMT",
"version": "v1"
}
] | 2015-06-15 | [
[
"Gaspar",
"I. Delgado",
""
],
[
"Martinez",
"A. Perez",
""
],
[
"Sussman",
"Roberto A.",
""
],
[
"Rey",
"A. Ulacia",
""
]
] | We examine the dynamics of a self--gravitating magnetized electron gas at finite temperature near the collapsing singularity of a Bianchi-I spacetime. Considering a general and appropriate and physically motivated initial conditions, we transform Einstein--Maxwell field equations into a complete and self--consistent dy... |
1311.6509 | Jan Steinhoff | Sayan Chakrabarti, T\'erence Delsate, Norman G\"urlebeck, Jan
Steinhoff | I-Q relation for rapidly rotating neutron stars | RevTeX, 6 pages, 5 figures, v2: overall improvement of presentation,
extended discussion of prospects for observations, v3: published version | Phys. Rev. Lett. 112, 201102 (2014) | 10.1103/PhysRevLett.112.201102 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a universal relation between moment of inertia and quadrupole
moment of arbitrarily fast rotating neutron stars. Recent studies suggest that
this relation breaks down for fast rotation. We find that it is still universal
among various suggested equations of state for constant values of certain
dimensionle... | [
{
"created": "Mon, 25 Nov 2013 22:47:43 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Feb 2014 18:54:43 GMT",
"version": "v2"
},
{
"created": "Fri, 27 Jun 2014 09:31:55 GMT",
"version": "v3"
}
] | 2014-06-30 | [
[
"Chakrabarti",
"Sayan",
""
],
[
"Delsate",
"Térence",
""
],
[
"Gürlebeck",
"Norman",
""
],
[
"Steinhoff",
"Jan",
""
]
] | We consider a universal relation between moment of inertia and quadrupole moment of arbitrarily fast rotating neutron stars. Recent studies suggest that this relation breaks down for fast rotation. We find that it is still universal among various suggested equations of state for constant values of certain dimensionless... |
1307.4448 | Barun Majumder | Barun Majumder | f(R) in Holographic and Agegraphic Dark Energy Models and the
Generalized Uncertainty Principle | To appear in Advances in High Energy Physics | Advances in High Energy Physics, Volume 2013 (2013), Article ID
143195, 11 pages | 10.1155/2013/143195 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We studied a unified approach with the holographic, new agegraphic and the
$f(R)$ dark energy model to construct the form of $f(R)$ which in general
responsible for the curvature driven explanation of the very early inflation
along with presently observed late time acceleration. We considered the
generalized uncertai... | [
{
"created": "Tue, 16 Jul 2013 23:18:32 GMT",
"version": "v1"
}
] | 2013-11-05 | [
[
"Majumder",
"Barun",
""
]
] | We studied a unified approach with the holographic, new agegraphic and the $f(R)$ dark energy model to construct the form of $f(R)$ which in general responsible for the curvature driven explanation of the very early inflation along with presently observed late time acceleration. We considered the generalized uncertaint... |
1209.2695 | Plamen Fiziev | Plamen P. Fiziev | Withholding Potentials, Absence of Ghosts and Relationship between
Minimal Dilatonic Gravity and f(R) Theories | LaTeX file, 13 pages, 4 figures. Typos corrected. A slightly
shortened version: the examples of f(R) models which are not equivalent to
the MDG removed together with the corresponding figures (See version 2.).
Some remarks removed or replaced by new ones. To appear in Physical Review D | Physical Review D 87, 044053 (2013) | 10.1103/PhysRevD.87.044053 | SU TH-5-09-2012 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the relation between Minimal Dilatonic Gravity (MDG) and f(R)
theories of gravity and establish strict conditions for their {\em global}
equivalence. Such equivalence takes place only for a certain class of
cosmological potentials, dubbed here {\em withholding potentials}, since they
prevent change of the si... | [
{
"created": "Wed, 12 Sep 2012 19:23:59 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Oct 2012 13:53:03 GMT",
"version": "v2"
},
{
"created": "Sat, 23 Feb 2013 16:46:43 GMT",
"version": "v3"
}
] | 2013-03-04 | [
[
"Fiziev",
"Plamen P.",
""
]
] | We study the relation between Minimal Dilatonic Gravity (MDG) and f(R) theories of gravity and establish strict conditions for their {\em global} equivalence. Such equivalence takes place only for a certain class of cosmological potentials, dubbed here {\em withholding potentials}, since they prevent change of the sign... |
2107.01935 | Sai Wang | Sai Wang, Valeri Vardanyan, Kazunori Kohri | Probing primordial black holes with anisotropies in stochastic
gravitational-wave background | Version accepted for publication in PRD, 10 pages, 6 figures | Phys. Rev. D 106, 123511 (2022) | 10.1103/PhysRevD.106.123511 | KEK-TH-2410, KEK-Cosmo-0286, KEK-QUP-2022-0016 | gr-qc astro-ph.CO astro-ph.HE | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Primordial black holes, if considered to constitute a significant fraction of
cold dark matter, trace the inhomogeneous large-scale structure of the
Universe. Consequently, the stochastic gravitational-wave background,
originating from incoherent superposition of unresolved signals emitted by
primordial black hole bi... | [
{
"created": "Mon, 5 Jul 2021 11:03:22 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Apr 2022 11:19:44 GMT",
"version": "v2"
},
{
"created": "Sun, 4 Dec 2022 01:33:00 GMT",
"version": "v3"
}
] | 2022-12-22 | [
[
"Wang",
"Sai",
""
],
[
"Vardanyan",
"Valeri",
""
],
[
"Kohri",
"Kazunori",
""
]
] | Primordial black holes, if considered to constitute a significant fraction of cold dark matter, trace the inhomogeneous large-scale structure of the Universe. Consequently, the stochastic gravitational-wave background, originating from incoherent superposition of unresolved signals emitted by primordial black hole bina... |
1507.07367 | Jake Dunn | Jake Dunn and Claude Warnick | The Klein-Gordon equation on the toric adS-Schwarzschild black hole | 32 pages, 1 figure | null | 10.1088/0264-9381/33/12/125010 | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the Klein-Gordon equation on the exterior of the toric anti
de-Sitter Schwarzschild black hole with Dirichlet, Neumann and Robin boundary
conditions at $\mathcal{I}$. We define a non-degenerate energy for the equation
which controls the renormalised $H^1$ norm of the field. We then establish both
decay an... | [
{
"created": "Mon, 27 Jul 2015 11:20:08 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Nov 2015 11:14:41 GMT",
"version": "v2"
}
] | 2016-05-25 | [
[
"Dunn",
"Jake",
""
],
[
"Warnick",
"Claude",
""
]
] | We consider the Klein-Gordon equation on the exterior of the toric anti de-Sitter Schwarzschild black hole with Dirichlet, Neumann and Robin boundary conditions at $\mathcal{I}$. We define a non-degenerate energy for the equation which controls the renormalised $H^1$ norm of the field. We then establish both decay and ... |
1907.01751 | Maksat Temirkhan Sergey | Michael R. R. Good, Maksat Temirkhan, Thomas Oikonomou | Stationary Worldline Power Distributions | 27 pages, 68 figures, The MSc thesis arXiv:1904.12916 is based on
this work | International Journal of Theoretical Physics, (2019), 1-27 | 10.1007/s10773-019-04176-7 | null | gr-qc physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A worldline with a time-independent spectrum is called stationary. Such
worldlines are arguably the most simple motions in physics. Barring the
trivially static motion, the non-trivial worldlines are uniformly accelerated.
As such, a point charge moving along a stationary worldline will emit constant
radiative power.... | [
{
"created": "Wed, 3 Jul 2019 06:06:29 GMT",
"version": "v1"
}
] | 2019-07-04 | [
[
"Good",
"Michael R. R.",
""
],
[
"Temirkhan",
"Maksat",
""
],
[
"Oikonomou",
"Thomas",
""
]
] | A worldline with a time-independent spectrum is called stationary. Such worldlines are arguably the most simple motions in physics. Barring the trivially static motion, the non-trivial worldlines are uniformly accelerated. As such, a point charge moving along a stationary worldline will emit constant radiative power. T... |
gr-qc/9903025 | T. R. Mongan | T. R. Mongan | Quantum mechanics forbids an initial or final singularity in a closed
FRW universe | 2 pages | Gen.Rel.Grav. 31 (1999) 1429-1430 | 10.1023/A:1026797413078 | null | gr-qc | null | The existence of singularities in a closed FRW universe depends on the
assumption that general relativity is valid for distances less than the Planck
length. However, stationary state wave functions of the Schrodinger equation
for a closed radiation-dominated FRW universe derived by Elbaz et al (General
Relativity an... | [
{
"created": "Sun, 7 Mar 1999 20:36:34 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Mongan",
"T. R.",
""
]
] | The existence of singularities in a closed FRW universe depends on the assumption that general relativity is valid for distances less than the Planck length. However, stationary state wave functions of the Schrodinger equation for a closed radiation-dominated FRW universe derived by Elbaz et al (General Relativity and ... |
gr-qc/0306045 | Cenalo Vaz | Cenalo Vaz (Univ. Algarve), Louis Witten (Univ. Cincinnati) and T.P.
Singh (TIFR) | Exact Quantum State of Collapse and Black Hole Radiation | 6 pages, no figures, RevTeX4. Portions have been rewritten to clarify
the contents. The results remain unchanged. Version to appear in Phys. Rev. D | Phys.Rev. D69 (2004) 104029 | 10.1103/PhysRevD.69.104029 | Ualg-03/03 | gr-qc hep-th | null | We construct an exact quantum gravitational state describing the collapse of
an inhomogeneous spherical dust cloud using a lattice regularization of the
Wheeler-DeWitt equation. In the semiclassical approximation around a black
hole, this state describes Hawking radiation. We show that the leading quantum
gravitation... | [
{
"created": "Wed, 11 Jun 2003 11:52:49 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Feb 2004 19:26:45 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Vaz",
"Cenalo",
"",
"Univ. Algarve"
],
[
"Witten",
"Louis",
"",
"Univ. Cincinnati"
],
[
"Singh",
"T. P.",
"",
"TIFR"
]
] | We construct an exact quantum gravitational state describing the collapse of an inhomogeneous spherical dust cloud using a lattice regularization of the Wheeler-DeWitt equation. In the semiclassical approximation around a black hole, this state describes Hawking radiation. We show that the leading quantum gravitational... |
1904.09509 | \.Izzet Sakall{\i} | Ali \"Ovg\"un, \.Izzet Sakall{\i}, and Halil Mutuk | Quasinormal modes of dS and AdS Black Holes: Feedforward neural network
method | Accepted for Publication in IJGMMP | Int.J.Geom.Meth.Mod.Phys. Vol. 18, No. 10, 2150154 (2021) | 10.1142/S0219887821501541 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we show how the quasinormal modes (QNMs) arise from the
perturbations of massive scalar fields propagating in the curved background by
using the artificial neural networks. To this end, we architect a special
algorithm for the feedforward neural network method (FNNM) to compute the QNMs
complying with ... | [
{
"created": "Sat, 20 Apr 2019 22:32:28 GMT",
"version": "v1"
},
{
"created": "Sun, 16 May 2021 17:20:36 GMT",
"version": "v2"
}
] | 2022-03-22 | [
[
"Övgün",
"Ali",
""
],
[
"Sakallı",
"İzzet",
""
],
[
"Mutuk",
"Halil",
""
]
] | In this paper, we show how the quasinormal modes (QNMs) arise from the perturbations of massive scalar fields propagating in the curved background by using the artificial neural networks. To this end, we architect a special algorithm for the feedforward neural network method (FNNM) to compute the QNMs complying with th... |
1707.07200 | Ouali Taoufik | Mariam Bouhmadi-L\'opez, Ahmed Errahmani, Taoufik Ouali and Yaser
Tavakoli | More on the holographic Ricci dark energy model: smoothing Rips through
interaction effects? | 10 pages, Shortened and improved version | Eur. Phys. J. C (2018) 78:330 | 10.1140/epjc/s10052-018-5773-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The background cosmological dynamics of the late Universe is analysed on the
framework of a dark energy model described by an holographic Ricci dark energy
component. Several kind of interactions between the dark energy and the dark
matter components are considered herein. We solve the background cosmological
dynamic... | [
{
"created": "Sat, 22 Jul 2017 18:01:58 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Apr 2018 23:17:58 GMT",
"version": "v2"
},
{
"created": "Thu, 3 May 2018 09:45:09 GMT",
"version": "v3"
}
] | 2018-05-09 | [
[
"Bouhmadi-López",
"Mariam",
""
],
[
"Errahmani",
"Ahmed",
""
],
[
"Ouali",
"Taoufik",
""
],
[
"Tavakoli",
"Yaser",
""
]
] | The background cosmological dynamics of the late Universe is analysed on the framework of a dark energy model described by an holographic Ricci dark energy component. Several kind of interactions between the dark energy and the dark matter components are considered herein. We solve the background cosmological dynamics ... |
0710.4362 | Gregory Mendell | Gregory Mendell, Karl Wette | Using generalized PowerFlux methods to estimate the parameters of
periodic gravitational waves | 8 pages, presented at Amalid7, Sydney, Australia (July 2007), fixed
minor typos and clarified discussion to match published CQG version; updated
references | Class.Quant.Grav.25:114044,2008 | 10.1088/0264-9381/25/11/114044 | null | gr-qc | null | We investigate methods to estimate the parameters of the gravitational-wave
signal from a spinning neutron star using Fourier transformed segments of the
strain response from an interferometric detector. Estimating the parameters
from the power, we find generalizations of the PowerFlux method. Using
simulated ellipti... | [
{
"created": "Tue, 23 Oct 2007 23:54:14 GMT",
"version": "v1"
},
{
"created": "Fri, 16 May 2008 00:06:49 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Mendell",
"Gregory",
""
],
[
"Wette",
"Karl",
""
]
] | We investigate methods to estimate the parameters of the gravitational-wave signal from a spinning neutron star using Fourier transformed segments of the strain response from an interferometric detector. Estimating the parameters from the power, we find generalizations of the PowerFlux method. Using simulated elliptica... |
1710.02865 | Heling Deng | Heling Deng and Alexander Vilenkin | Primordial black hole formation by vacuum bubbles | 39 pages, 12 figures | null | 10.1088/1475-7516/2017/12/044 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Vacuum bubbles may nucleate during the inflationary epoch and expand,
reaching relativistic speeds. After inflation ends, the bubbles are quickly
slowed down, transferring their momentum to a shock wave that propagates
outwards in the radiation background. The ultimate fate of the bubble depends
on its size. Bubbles ... | [
{
"created": "Sun, 8 Oct 2017 18:04:57 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Mar 2018 05:12:50 GMT",
"version": "v2"
}
] | 2018-03-13 | [
[
"Deng",
"Heling",
""
],
[
"Vilenkin",
"Alexander",
""
]
] | Vacuum bubbles may nucleate during the inflationary epoch and expand, reaching relativistic speeds. After inflation ends, the bubbles are quickly slowed down, transferring their momentum to a shock wave that propagates outwards in the radiation background. The ultimate fate of the bubble depends on its size. Bubbles sm... |
1305.5461 | Bayram Tekin | Ibrahim Gullu, Bayram Tekin | Spin-Spin Interactions in Massive Gravity and Higher Derivative Gravity
Theories | 7 pages, title has changed, derivations of the results incorporated
to the Appendix. Matches the published version in Physics Letters B | Physics Letters B Volume 728 (2014) 268 | 10.1016/j.physletb.2013.11.064 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that, in the weak field limit, at large separations, in sharp
contrast to General Relativity (GR), all massive gravity theories predict
distance-dependent spin alignments for spinning objects. For all separations GR
requires anti-parallel spin orientations with spins pointing along the line
joining the source... | [
{
"created": "Thu, 23 May 2013 15:37:28 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Sep 2013 15:11:09 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Nov 2013 14:43:42 GMT",
"version": "v3"
},
{
"created": "Wed, 11 Dec 2013 13:12:23 GMT",
"version": "v4"
}
] | 2014-01-17 | [
[
"Gullu",
"Ibrahim",
""
],
[
"Tekin",
"Bayram",
""
]
] | We show that, in the weak field limit, at large separations, in sharp contrast to General Relativity (GR), all massive gravity theories predict distance-dependent spin alignments for spinning objects. For all separations GR requires anti-parallel spin orientations with spins pointing along the line joining the sources.... |
1205.0930 | Olivier Besida | Olivier Besida (SPP) | The road toward a general relativistic metric inside the Earth and its
effect on neutrino travel from CERN to GRAN-SASSO Laboratory | 26 pages | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a first attempt to describe the effect on neutrino travel inside the Earth
caused by general relativity in the case of a dense Earth, we have neglected
the Earth's rotation, the Earth's ellipticity and also the surface terrain
variation, nevertheless we have focused our attention on the density
description of the ... | [
{
"created": "Fri, 4 May 2012 12:15:22 GMT",
"version": "v1"
}
] | 2012-05-07 | [
[
"Besida",
"Olivier",
"",
"SPP"
]
] | In a first attempt to describe the effect on neutrino travel inside the Earth caused by general relativity in the case of a dense Earth, we have neglected the Earth's rotation, the Earth's ellipticity and also the surface terrain variation, nevertheless we have focused our attention on the density description of the Ea... |
1902.08273 | Charles J. Horowitz | C. J. Horowitz, M. A. Papa, and S. Reddy | Gravitational waves from compact dark matter objects in the solar system | 5 pages, 3 figures, Phys. Lett. B in press | Phys. Lett. B 800, 135072 (2020) | 10.1016/j.physletb.2019.135072 | null | gr-qc astro-ph.HE astro-ph.IM hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dark matter could be composed of compact dark objects (CDOs). A close binary
of CDOs orbiting in the interior of solar system bodies can be a loud source of
gravitational waves (GWs) for the LIGO and VIRGO detectors. We perform the
first search ever for this type of signal and rule out close binaries, with
separation... | [
{
"created": "Thu, 21 Feb 2019 21:26:22 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Oct 2019 14:33:50 GMT",
"version": "v2"
}
] | 2019-11-18 | [
[
"Horowitz",
"C. J.",
""
],
[
"Papa",
"M. A.",
""
],
[
"Reddy",
"S.",
""
]
] | Dark matter could be composed of compact dark objects (CDOs). A close binary of CDOs orbiting in the interior of solar system bodies can be a loud source of gravitational waves (GWs) for the LIGO and VIRGO detectors. We perform the first search ever for this type of signal and rule out close binaries, with separations ... |
2110.11997 | Fabrizio Di Giovanni | Fabrizio Di Giovanni, Nicolas Sanchis-Gual, Pablo Cerd\'a-Dur\'an,
Jos\'e Antonio Font | Can fermion-boson stars reconcile multi-messenger observations of
compact stars? | 9 pages, 7 figures | null | 10.1103/PhysRevD.105.063005 | null | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Mixed fermion-boson stars are stable, horizonless, everywhere regular
solutions of the coupled Einstein-(complex, massive) Klein-Gordon-Euler system.
While isolated neutron stars and boson stars are uniquely determined by their
central energy density, mixed configurations conform an extended parameter
space that depe... | [
{
"created": "Fri, 22 Oct 2021 18:21:47 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Oct 2021 16:18:02 GMT",
"version": "v2"
}
] | 2022-03-14 | [
[
"Di Giovanni",
"Fabrizio",
""
],
[
"Sanchis-Gual",
"Nicolas",
""
],
[
"Cerdá-Durán",
"Pablo",
""
],
[
"Font",
"José Antonio",
""
]
] | Mixed fermion-boson stars are stable, horizonless, everywhere regular solutions of the coupled Einstein-(complex, massive) Klein-Gordon-Euler system. While isolated neutron stars and boson stars are uniquely determined by their central energy density, mixed configurations conform an extended parameter space that depend... |
2404.16909 | Naman Kumar | Naman Kumar | Relativistic Correction to Black Hole Entropy | null | Gen Relativ Gravit 56, 47 (2024) | 10.1007/s10714-024-03228-6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the relativistic correction to Bekenstein-Hawking
entropy in the canonical ensemble and isothermal-isobaric ensemble and apply it
to the cases of non-rotating BTZ and AdS-Schwarzschild black holes. This is
realized by generalizing the equations obtained using Boltzmann-Gibbs(BG)
statistics wit... | [
{
"created": "Thu, 25 Apr 2024 13:38:16 GMT",
"version": "v1"
}
] | 2024-04-29 | [
[
"Kumar",
"Naman",
""
]
] | In this paper, we study the relativistic correction to Bekenstein-Hawking entropy in the canonical ensemble and isothermal-isobaric ensemble and apply it to the cases of non-rotating BTZ and AdS-Schwarzschild black holes. This is realized by generalizing the equations obtained using Boltzmann-Gibbs(BG) statistics with ... |
1405.5863 | Davood Momeni Dr | Davood Momeni, Ratbay Myrzakulov | Cosmological reconstruction of $f(T,\mathcal{T})$ Gravity | references added, Accepted for publication in "International Journal
of Geometric Methods in Modern Physics." | Int.J.Geom.Meth.Mod.Phys. 11 (2014) no.08, 1450077 | 10.1142/S0219887814500777 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the newly proposal for gravity as the effect of the torsion
scalar $T$ and trace of the energy momentum tensor $\mathcal{T}$,we investigate
the cosmological reconstruction of different models of the Universe. Our aim
here is to show that how this modified gravity model, $f(T,\mathcal{T})$ is
able to repr... | [
{
"created": "Thu, 8 May 2014 16:02:13 GMT",
"version": "v1"
},
{
"created": "Thu, 29 May 2014 14:42:01 GMT",
"version": "v2"
}
] | 2018-10-09 | [
[
"Momeni",
"Davood",
""
],
[
"Myrzakulov",
"Ratbay",
""
]
] | Motivated by the newly proposal for gravity as the effect of the torsion scalar $T$ and trace of the energy momentum tensor $\mathcal{T}$,we investigate the cosmological reconstruction of different models of the Universe. Our aim here is to show that how this modified gravity model, $f(T,\mathcal{T})$ is able to reprod... |
gr-qc/0110047 | Mark Miller | J. Font, T. Goodale, S. Iyer, M. Miller, L. Rezzolla, E. Seidel, N.
Stergioulas, W. Suen, M. Tobias | Three-dimensional general relativistic hydrodynamics II: long-term
dynamics of single relativistic stars | 19 pages, 17 figures | Phys.Rev. D65 (2002) 084024 | 10.1103/PhysRevD.65.084024 | null | gr-qc astro-ph | null | This is the second in a series of papers on the construction and validation
of a three-dimensional code for the solution of the coupled system of the
Einstein equations and of the general relativistic hydrodynamic equations, and
on the application of this code to problems in general relativistic
astrophysics. In part... | [
{
"created": "Tue, 9 Oct 2001 15:42:58 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Font",
"J.",
""
],
[
"Goodale",
"T.",
""
],
[
"Iyer",
"S.",
""
],
[
"Miller",
"M.",
""
],
[
"Rezzolla",
"L.",
""
],
[
"Seidel",
"E.",
""
],
[
"Stergioulas",
"N.",
""
],
[
"Suen",
"W.",
""
... | This is the second in a series of papers on the construction and validation of a three-dimensional code for the solution of the coupled system of the Einstein equations and of the general relativistic hydrodynamic equations, and on the application of this code to problems in general relativistic astrophysics. In partic... |
1407.5058 | J. Navarro-Salas | Adrian del Rio, Jose Navarro-Salas and Francisco Torrenti | Renormalized stress-energy tensor for spin-1/2 fields in expanding
universes | Latex file, 26 pages | Phys Rev D 90 (2014) 084017 | 10.1103/PhysRevD.90.084017 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide an explicit expression for the renormalized expectation value of
the stress-energy tensor of a spin-$1/2$ field in a spatially flat FLRW
universe. Its computation is based on the extension of the adiabatic
regularization method to fermion fields introduced recently in the literature.
The tensor is given in... | [
{
"created": "Fri, 18 Jul 2014 17:00:43 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Sep 2014 15:36:22 GMT",
"version": "v2"
}
] | 2021-09-17 | [
[
"del Rio",
"Adrian",
""
],
[
"Navarro-Salas",
"Jose",
""
],
[
"Torrenti",
"Francisco",
""
]
] | We provide an explicit expression for the renormalized expectation value of the stress-energy tensor of a spin-$1/2$ field in a spatially flat FLRW universe. Its computation is based on the extension of the adiabatic regularization method to fermion fields introduced recently in the literature. The tensor is given in t... |
2210.10690 | De-Jun Wu | De-Jun Wu | Relativistic star solutions in Mass-varying Massive Gravity with a
diagonal metric | 14 pages; V2:References added, minor changes | Phys. Rev D 107, 044065(2023) | 10.1103/PhysRevD.107.044065 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate relativistic star solutions in Mass-Varying Massive Gravity
(MVMG) with a diagonal metric. Contrary to the intuition that there is no
fundamental difference between diagonal metric and non-diagonal metric
solutions regarding relativistic stars, we find that with a diagonal metric,
well-behaved relativi... | [
{
"created": "Wed, 19 Oct 2022 16:05:39 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Apr 2023 16:03:24 GMT",
"version": "v2"
}
] | 2023-04-20 | [
[
"Wu",
"De-Jun",
""
]
] | We investigate relativistic star solutions in Mass-Varying Massive Gravity (MVMG) with a diagonal metric. Contrary to the intuition that there is no fundamental difference between diagonal metric and non-diagonal metric solutions regarding relativistic stars, we find that with a diagonal metric, well-behaved relativist... |
gr-qc/0406073 | Orhan Donmez | Orhan Donmez | Code Development of Three-Dimensional General Relativistic Hydrodynamics
with AMR(Adaptive-Mesh Refinement) and Results From Special and General
Relativistic Hydrodynamic | 18 pages, 13 figures. Accepted for publication in Astrophysics and
Space Science | Astrophys.Space Sci. 293 (2004) 323-354 | 10.1023/B:ASTR.0000044610.53714.95 | null | gr-qc | null | In this paper, the general procedure to solve the General Relativistic
Hydrodynamical(GRH) equations with Adaptive-Mesh Refinement (AMR) is presented.
In order to achieve, the GRH equations are written in the conservation form to
exploit their hyperbolic character. The numerical solutions of general
relativistic hydr... | [
{
"created": "Fri, 18 Jun 2004 16:29:00 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Donmez",
"Orhan",
""
]
] | In this paper, the general procedure to solve the General Relativistic Hydrodynamical(GRH) equations with Adaptive-Mesh Refinement (AMR) is presented. In order to achieve, the GRH equations are written in the conservation form to exploit their hyperbolic character. The numerical solutions of general relativistic hydrod... |
1609.06296 | Shahen Hacyan | Shahen Hacyan | Gravitational radiation from a rotating magnetic dipole | new version | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational radiation emitted by a rotating magnetic dipole is
calculated. Formulas for the polarization amplitudes and the radiated power are
obtained in closed forms. A comparison is made with other sources of
gravitational and electromagnetic radiation, particularly neutron stars with
extremely powerful magn... | [
{
"created": "Tue, 20 Sep 2016 19:24:51 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Jan 2017 18:29:01 GMT",
"version": "v2"
}
] | 2017-01-16 | [
[
"Hacyan",
"Shahen",
""
]
] | The gravitational radiation emitted by a rotating magnetic dipole is calculated. Formulas for the polarization amplitudes and the radiated power are obtained in closed forms. A comparison is made with other sources of gravitational and electromagnetic radiation, particularly neutron stars with extremely powerful magnet... |
2006.16522 | Avijit Chowdhury | Avijit Chowdhury and Narayan Banerjee | Echoes from a singularity | Version published in PRD | Phys. Rev. D 102, 124051 (2020) | 10.1103/PhysRevD.102.124051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Though the cosmic censorship conjecture states that spacetime singularities
must be hidden from an asymptotic observer by an event horizon, naked
singularities can form as the end product of a gravitational collapse under
suitable initial conditions, so the question of how to observationally
distinguish such naked si... | [
{
"created": "Tue, 30 Jun 2020 04:35:58 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Dec 2020 04:37:25 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Dec 2020 14:10:22 GMT",
"version": "v3"
}
] | 2020-12-24 | [
[
"Chowdhury",
"Avijit",
""
],
[
"Banerjee",
"Narayan",
""
]
] | Though the cosmic censorship conjecture states that spacetime singularities must be hidden from an asymptotic observer by an event horizon, naked singularities can form as the end product of a gravitational collapse under suitable initial conditions, so the question of how to observationally distinguish such naked sing... |
2108.11666 | Alireza Talebian Ashkezari | Seyed Ali Hosseini Mansoori, Alireza Talebian, Zahra Molaee, and
Hassan Firouzjahi | Multi-field Mimetic Gravity | 23 pages, 11 figures, matches published version | Phys. Rev. D 105, 023529 (2022) | 10.1103/PhysRevD.105.023529 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we extend the mimetic gravity to the multi-field setup with a
curved field space manifold. The multi-field mimetic scenario is realized via
the singular limit of the conformal transformation between the auxiliary and
the physical metrics. We look for the cosmological implications of the setup
where it ... | [
{
"created": "Thu, 26 Aug 2021 09:25:51 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Oct 2021 05:08:20 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Jan 2022 07:08:35 GMT",
"version": "v3"
}
] | 2022-01-31 | [
[
"Mansoori",
"Seyed Ali Hosseini",
""
],
[
"Talebian",
"Alireza",
""
],
[
"Molaee",
"Zahra",
""
],
[
"Firouzjahi",
"Hassan",
""
]
] | In this paper, we extend the mimetic gravity to the multi-field setup with a curved field space manifold. The multi-field mimetic scenario is realized via the singular limit of the conformal transformation between the auxiliary and the physical metrics. We look for the cosmological implications of the setup where it is... |
0811.4667 | Valerio Faraoni | Valerio Faraoni, Changjun Gao, Xuelei Chen, and You-Gen Shen | What is the fate of a black hole embedded in an expanding universe? | 9 pages, LaTex, to appear in Phys. Lett. B | Phys.Lett.B671:7-9,2009 | 10.1016/j.physletb.2008.11.067 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within a large class of exact solutions of the Einstein equations describing
a black hole embedded in a Friedmann universe it is shown that, under certain
assumptions, only those with comoving Hawking-Hayward quasi-local mass are
generic, in the sense that they are late-time attractors.
| [
{
"created": "Fri, 28 Nov 2008 08:32:06 GMT",
"version": "v1"
}
] | 2009-03-04 | [
[
"Faraoni",
"Valerio",
""
],
[
"Gao",
"Changjun",
""
],
[
"Chen",
"Xuelei",
""
],
[
"Shen",
"You-Gen",
""
]
] | Within a large class of exact solutions of the Einstein equations describing a black hole embedded in a Friedmann universe it is shown that, under certain assumptions, only those with comoving Hawking-Hayward quasi-local mass are generic, in the sense that they are late-time attractors. |
gr-qc/0305099 | Jean-Philippe Uzan | George F.R. Ellis, Jean-Philippe Uzan | `c' is the speed of light, isn't it? | 14 pages, Latex | Am.J.Phys. 73 (2005) 240-247 | 10.1119/1.1819929 | null | gr-qc astro-ph hep-th | null | Theories proposing a varying speed of light have recently been widely
promoted under the claim that they offer an alternative way of solving the
standard cosmological problems. Recent observational hints that the fine
structure constant may have varied during over cosmological scales also has
given impetus to these m... | [
{
"created": "Tue, 27 May 2003 16:54:07 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Jun 2003 09:47:05 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Ellis",
"George F. R.",
""
],
[
"Uzan",
"Jean-Philippe",
""
]
] | Theories proposing a varying speed of light have recently been widely promoted under the claim that they offer an alternative way of solving the standard cosmological problems. Recent observational hints that the fine structure constant may have varied during over cosmological scales also has given impetus to these mod... |
2201.09026 | Shao-Wen Wei | Ming-Da Li, Hui-Min Wang, Shao-Wen Wei | Triple points and novel phase transitions of dyonic AdS black holes with
quasitopological electromagnetism | 18 pages, 11 figures and 2 tables. Major revision | Phys. Rev. D 105, 104048 (2022) | 10.1103/PhysRevD.105.104048 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasitopological electromagnetism has an important influence on the strong
gravity of dyonic black hole. For example three photon spheres with one being
stable are found and we wish to test them with the observed black hole shadow.
We are primarily concerned with the thermodynamics and phase transition for a
dyonic a... | [
{
"created": "Sat, 22 Jan 2022 11:48:10 GMT",
"version": "v1"
},
{
"created": "Thu, 26 May 2022 06:23:00 GMT",
"version": "v2"
}
] | 2022-06-02 | [
[
"Li",
"Ming-Da",
""
],
[
"Wang",
"Hui-Min",
""
],
[
"Wei",
"Shao-Wen",
""
]
] | Quasitopological electromagnetism has an important influence on the strong gravity of dyonic black hole. For example three photon spheres with one being stable are found and we wish to test them with the observed black hole shadow. We are primarily concerned with the thermodynamics and phase transition for a dyonic ant... |
2203.06016 | Valeriya Korol | Pau Amaro Seoane, Jeff Andrews, Manuel Arca Sedda, Abbas Askar,
Quentin Baghi, Razvan Balasov, Imre Bartos, Simone S. Bavera, Jillian
Bellovary, Christopher P. L. Berry, Emanuele Berti, Stefano Bianchi, Laura
Blecha, Ste\'phane Blondin, Tamara Bogdanovi\'c, Samuel Boissier, Matteo
Bonetti, Silvia Bonoli, Elisa ... | Astrophysics with the Laser Interferometer Space Antenna | null | Living Reviews in Relativity, Volume 26, Article number: 2 (2023) | 10.1007/s41114-022-00041-y | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE astro-ph.IM astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Laser Interferometer Space Antenna (LISA) will be a transformative
experiment for gravitational wave astronomy, and, as such, it will offer unique
opportunities to address many key astrophysical questions in a completely novel
way. The synergy with ground-based and space-born instruments in the
electromagnetic do... | [
{
"created": "Fri, 11 Mar 2022 15:38:06 GMT",
"version": "v1"
},
{
"created": "Thu, 25 May 2023 11:14:45 GMT",
"version": "v2"
}
] | 2023-05-26 | [
[
"Seoane",
"Pau Amaro",
""
],
[
"Andrews",
"Jeff",
""
],
[
"Sedda",
"Manuel Arca",
""
],
[
"Askar",
"Abbas",
""
],
[
"Baghi",
"Quentin",
""
],
[
"Balasov",
"Razvan",
""
],
[
"Bartos",
"Imre",
""
],
[
... | The Laser Interferometer Space Antenna (LISA) will be a transformative experiment for gravitational wave astronomy, and, as such, it will offer unique opportunities to address many key astrophysical questions in a completely novel way. The synergy with ground-based and space-born instruments in the electromagnetic doma... |
gr-qc/9801019 | I. Kouletsis | I. Kouletsis | A classical history theory: Geometrodynamics and general field dynamics
regained | 23 pages, no figures, LaTeX | null | null | Imperial/TP/97-98/17 | gr-qc | null | Assuming that the Hamiltonian of a canonical field theory can be written in
the form N H + N^i H_i, and using as the only input the actual choice of the
canonical variables, we derive: (i) The algebra satisfied by H and H_i, (ii)
any constraints, and (iii) the most general canonical representation for H and
H_i. This... | [
{
"created": "Thu, 8 Jan 1998 14:33:33 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Kouletsis",
"I.",
""
]
] | Assuming that the Hamiltonian of a canonical field theory can be written in the form N H + N^i H_i, and using as the only input the actual choice of the canonical variables, we derive: (i) The algebra satisfied by H and H_i, (ii) any constraints, and (iii) the most general canonical representation for H and H_i. This c... |
1312.1144 | Chen Songbai | Hao Liao, Songbai Chen, Jiliang Jing | Absorption cross section and Hawking radiation of the electromagnetic
field with Weyl corrections | 10 pages, 8 figures. Accepted for publication in Physics Letters B | Phys. Lett. B 728 (2014) 457-461 | 10.1016/j.physletb.2013.12.018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have investigated the absorption cross section and the Hawking radiation
of electromagnetic field with Weyl correction in the background of a
four-dimensional Schwarzschild black hole spacetime. Our results show that the
properties of the absorption cross section and the Hawking radiation depend not
only on the We... | [
{
"created": "Wed, 4 Dec 2013 13:05:18 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Dec 2013 00:53:15 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Liao",
"Hao",
""
],
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | We have investigated the absorption cross section and the Hawking radiation of electromagnetic field with Weyl correction in the background of a four-dimensional Schwarzschild black hole spacetime. Our results show that the properties of the absorption cross section and the Hawking radiation depend not only on the Weyl... |
gr-qc/0406015 | Yuri Obukhov | Yu.N. Obukhov, J.G. Pereira | Lessons of spin and torsion: Reply to ``Consistent coupling to Dirac
fields in teleparallelism" | Revtex, 4 pages, no figures | Phys.Rev. D69 (2004) 128502 | 10.1103/PhysRevD.69.128502 | null | gr-qc | null | In reply to the criticism made by Mielke in the pereceding Comment [Phys.
Rev. D69 (2004) 128501] on our recent paper, we once again explicitly
demonstrate the inconsistency of the coupling of a Dirac field to gravitation
in the teleparallel equivalent of general relativity. Moreover, we stress that
the mentioned inc... | [
{
"created": "Fri, 4 Jun 2004 13:26:37 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Obukhov",
"Yu. N.",
""
],
[
"Pereira",
"J. G.",
""
]
] | In reply to the criticism made by Mielke in the pereceding Comment [Phys. Rev. D69 (2004) 128501] on our recent paper, we once again explicitly demonstrate the inconsistency of the coupling of a Dirac field to gravitation in the teleparallel equivalent of general relativity. Moreover, we stress that the mentioned incon... |
2012.00847 | Ivan Stefanov | Ivan Zhivkov Stefanov | Mass-spin relation of black holes obtained by twin high-frequency
quasi-periodic oscillations | null | IJMPD, 29, No. 16, 2050110 (2020) | 10.1142/S0218271820501102 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper studies the uniqueness and the monotonicity of the mass-spin
relation of black holes the X-ray power density spectra of which contain twin
high-frequency quasi-periodic oscillations in 3:2 ratio. It is found that for
geodesic models the properties of the mass-spin relation are independent of the
observed fr... | [
{
"created": "Tue, 1 Dec 2020 21:34:45 GMT",
"version": "v1"
}
] | 2023-05-03 | [
[
"Stefanov",
"Ivan Zhivkov",
""
]
] | The paper studies the uniqueness and the monotonicity of the mass-spin relation of black holes the X-ray power density spectra of which contain twin high-frequency quasi-periodic oscillations in 3:2 ratio. It is found that for geodesic models the properties of the mass-spin relation are independent of the observed freq... |
1904.08521 | Volker Perlick | Wolfgang Hasse and Volker Perlick | Redshift in Finsler spacetimes | 12 pages, 3 figures; minor changes, five references added | Phys. Rev. D 100, 024033 (2019) | 10.1103/PhysRevD.100.024033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive and discuss a general redshift formula in Finsler spacetimes. The
condition for the existence of a redshift potential is worked out. The results
are illustrated with two examples, one refering to a spherically symmetric and
static Finsler spacetime and the other to a cosmological Finsler spacetime.
| [
{
"created": "Wed, 17 Apr 2019 22:20:49 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jun 2019 22:09:10 GMT",
"version": "v2"
}
] | 2019-07-18 | [
[
"Hasse",
"Wolfgang",
""
],
[
"Perlick",
"Volker",
""
]
] | We derive and discuss a general redshift formula in Finsler spacetimes. The condition for the existence of a redshift potential is worked out. The results are illustrated with two examples, one refering to a spherically symmetric and static Finsler spacetime and the other to a cosmological Finsler spacetime. |
1712.02464 | Kian Ming | Kian Ming, Triyanta, J. S. Kosasih | Gravitoelectromagnetism in Teleparallel Equivalent of General
Relativity: A New Alternative | null | Kian Ming, Triyanta, dan Kosasih, J. S., (2017):
Gravitoelectromagnetism in Teleparallel Equivalent of General Relativity: A
New Alternative, International Journal of Modern Physics D, 26, 1750092 | 10.1142/S0218271817500924 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spaniol and Andrade introduced grvitoelectromagnetism in TEGR by considering
superpotentials, times the determinant of tetrads, as the
gravitoelectromagnetic fields. However, since this defined
gravitoelectromagnetic field strength does not give rise to a complete set of
Maxwell-like equations, we propose an alternat... | [
{
"created": "Thu, 7 Dec 2017 01:11:12 GMT",
"version": "v1"
}
] | 2017-12-13 | [
[
"Ming",
"Kian",
""
],
[
"Triyanta",
"",
""
],
[
"Kosasih",
"J. S.",
""
]
] | Spaniol and Andrade introduced grvitoelectromagnetism in TEGR by considering superpotentials, times the determinant of tetrads, as the gravitoelectromagnetic fields. However, since this defined gravitoelectromagnetic field strength does not give rise to a complete set of Maxwell-like equations, we propose an alternativ... |
gr-qc/0410025 | Bin Wang | Cheng-Gang Shao, Bin Wang, Elcio Abdalla and Ru-Keng Su | Quasinormal modes in time-dependent black hole background | revised version, 20 pages, accepted for publication in Phys. Rev. D | Phys.Rev. D71 (2005) 044003 | 10.1103/PhysRevD.71.044003 | null | gr-qc astro-ph hep-th | null | We have studied the evolution of the massless scalar field propagating in
time-dependent charged Vaidya black hole background. A generalized tortoise
coordinate transformation were used to study the evolution of the massless
scalar field. It is shown that, for the slowest damped quasinormal modes, the
approximate for... | [
{
"created": "Wed, 6 Oct 2004 08:00:07 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jan 2005 14:55:40 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Shao",
"Cheng-Gang",
""
],
[
"Wang",
"Bin",
""
],
[
"Abdalla",
"Elcio",
""
],
[
"Su",
"Ru-Keng",
""
]
] | We have studied the evolution of the massless scalar field propagating in time-dependent charged Vaidya black hole background. A generalized tortoise coordinate transformation were used to study the evolution of the massless scalar field. It is shown that, for the slowest damped quasinormal modes, the approximate formu... |
1204.0789 | Tapas Kumar Das | Shilpi Agarwal, Tapas K. Das, Rukmini Dey and Sankhasubhra Nag | An Analytical Study on the Multi-critical Behaviour and Related
Bifurcation Phenomena for Relativistic Black Hole Accretion | 19 pages, 2 eps figures, to appear in "General Relativity and
Gravitation" | null | 10.1007/s10714-012-1358-z | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the theory of algebraic polynomials to analytically study the
transonic properties of general relativistic hydrodynamic axisymmetric
accretion onto non-rotating astrophysical black holes. For such accretion
phenomena, the conserved specific energy of the flow, which turns out to be one
of the two first integ... | [
{
"created": "Tue, 3 Apr 2012 20:00:04 GMT",
"version": "v1"
}
] | 2012-04-05 | [
[
"Agarwal",
"Shilpi",
""
],
[
"Das",
"Tapas K.",
""
],
[
"Dey",
"Rukmini",
""
],
[
"Nag",
"Sankhasubhra",
""
]
] | We apply the theory of algebraic polynomials to analytically study the transonic properties of general relativistic hydrodynamic axisymmetric accretion onto non-rotating astrophysical black holes. For such accretion phenomena, the conserved specific energy of the flow, which turns out to be one of the two first integra... |
1510.01353 | Irina Dymnikova | Irina Dymnikova and Evgeny Galaktionov | Regular rotating electrically charged black holes and solitons in
nonlinear electrodynamics minimally coupled to gravity | 17 pages, 3 figures. arXiv admin note: substantial text overlap with
arXiv:1510.01126 | Class. Quant. Grav. 32 (2015) 165015 | 10.1088/0264-9381/32/16/165015 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In nonlinear electrodynamics coupled to gravity, regular spherically
symmetric electrically charged solutions satisfy the weak energy condition and
have obligatory de Sitter centre. By the G\"urses-G\"ursey algorithm they are
transformed to spinning electrically charged solutions asymptotically
Kerr-Newman for a dist... | [
{
"created": "Fri, 2 Oct 2015 14:07:15 GMT",
"version": "v1"
}
] | 2015-10-07 | [
[
"Dymnikova",
"Irina",
""
],
[
"Galaktionov",
"Evgeny",
""
]
] | In nonlinear electrodynamics coupled to gravity, regular spherically symmetric electrically charged solutions satisfy the weak energy condition and have obligatory de Sitter centre. By the G\"urses-G\"ursey algorithm they are transformed to spinning electrically charged solutions asymptotically Kerr-Newman for a distan... |
2007.08166 | \.Ibrahim Semiz | \.Ibrahim Semiz | The general static spherical perfect fluid solution with EoS parameter
w=-1/5 | Added tables and conformal diagrams. Close to published version,
which contains improved versions of some Penrose diagrams and an appendix on
the Buchdahl transformation | Class. Quantum Grav. 39 215002 (2022) | 10.1088/1361-6382/ac8cca | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The general analytical solution for the static spherically symmetric metric
supported by a perfect fluid with isothermal (proportional) equation-of-state
$p = w \rho$ is not known at the time of this writing, except for the trivial
cases $w=0$ and $w=-1$; and for $w=-1/3$. We show that if Buchdahl coordinates
are use... | [
{
"created": "Thu, 16 Jul 2020 07:59:45 GMT",
"version": "v1"
},
{
"created": "Sat, 5 Sep 2020 00:24:01 GMT",
"version": "v2"
},
{
"created": "Wed, 6 Apr 2022 18:26:44 GMT",
"version": "v3"
},
{
"created": "Sat, 29 Oct 2022 14:25:29 GMT",
"version": "v4"
}
] | 2022-11-01 | [
[
"Semiz",
"İbrahim",
""
]
] | The general analytical solution for the static spherically symmetric metric supported by a perfect fluid with isothermal (proportional) equation-of-state $p = w \rho$ is not known at the time of this writing, except for the trivial cases $w=0$ and $w=-1$; and for $w=-1/3$. We show that if Buchdahl coordinates are used,... |
1203.2154 | Jeffrey Winicour | Jeffrey Winicour | Boundary Conditions for the Gravitational Field | Some clarification added and typos corrected. Final version to appear
in Classical and Quantum Gravity | Class. Quantum Grav. 29 (2012) 113001 | 10.1088/0264-9381/29/11/113001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A review of the treatment of boundaries in general relativity is presented
with the emphasis on application to the formulations of Einstein's equations
used in numerical relativity. At present, it is known how to treat boundaries
in the harmonic formulation of Einstein's equations and a tetrad formulation of
the Eins... | [
{
"created": "Fri, 9 Mar 2012 18:01:20 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Apr 2012 15:52:44 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Winicour",
"Jeffrey",
""
]
] | A review of the treatment of boundaries in general relativity is presented with the emphasis on application to the formulations of Einstein's equations used in numerical relativity. At present, it is known how to treat boundaries in the harmonic formulation of Einstein's equations and a tetrad formulation of the Einste... |
1806.11160 | Juan Calderon Bustillo | Juan Calder\'on Bustillo, James A. Clark, Pablo Laguna and Deirdre
Shoemaker | Tracking black hole kicks from gravitational wave observations | 6 pages, 5 figures | Phys. Rev. Lett. 121, 191102 (2018) | 10.1103/PhysRevLett.121.191102 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Coalescing binary black holes emit anisotropic gravitational radiation. This
causes a net emission of linear momentum that produces a gradual acceleration
of the source. As a result, the final remnant black hole acquires a
characteristic velocity known as recoil velocity or gravitational kick. The
symmetries of gravi... | [
{
"created": "Thu, 28 Jun 2018 19:52:19 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Oct 2018 13:57:05 GMT",
"version": "v2"
}
] | 2018-11-14 | [
[
"Bustillo",
"Juan Calderón",
""
],
[
"Clark",
"James A.",
""
],
[
"Laguna",
"Pablo",
""
],
[
"Shoemaker",
"Deirdre",
""
]
] | Coalescing binary black holes emit anisotropic gravitational radiation. This causes a net emission of linear momentum that produces a gradual acceleration of the source. As a result, the final remnant black hole acquires a characteristic velocity known as recoil velocity or gravitational kick. The symmetries of gravita... |
2007.10223 | Andr\'es Ace\~na | Andr\'es Ace\~na | CMC surfaces and area-charge inequality for a spheroidal ECD spacetime | 19 pages, 12 figures | Phys. Rev. D 102, 104046 (2020) | 10.1103/PhysRevD.102.104046 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the spacetime presented by Bonnor \cite{Bonnor98}, whose matter
content is a spheroid of electrically counterpoised dust, in the context of the
geometrical inequalities between area and charge. We determine numerically the
constant mean curvature surfaces that are candidates to be stable isoperimetric
sur... | [
{
"created": "Mon, 20 Jul 2020 16:09:17 GMT",
"version": "v1"
}
] | 2020-11-25 | [
[
"Aceña",
"Andrés",
""
]
] | We consider the spacetime presented by Bonnor \cite{Bonnor98}, whose matter content is a spheroid of electrically counterpoised dust, in the context of the geometrical inequalities between area and charge. We determine numerically the constant mean curvature surfaces that are candidates to be stable isoperimetric surfa... |
1810.03816 | Jibitesh Dutta | Hmar Zonunmawia, Wompherdeiki Khyllep, Jibitesh Dutta and Laur J\"arv | Cosmological dynamics of brane gravity: A global dynamical system
perspective | 25 pages and 8 figures. Accepted in PRD | Physical Review D, 98, 2018 | 10.1103/PhysRevD.98.083532 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The braneworld model of gravity is well-known for several notable
cosmological features such as self-acceleration originating from a geometric
and not matter source, effective dark energy behavior with phantom
characteristics but not leading to a Big-Rip singularity, rough resemblance to
the $\Lambda$CDM evolution, e... | [
{
"created": "Tue, 9 Oct 2018 04:57:18 GMT",
"version": "v1"
}
] | 2018-10-24 | [
[
"Zonunmawia",
"Hmar",
""
],
[
"Khyllep",
"Wompherdeiki",
""
],
[
"Dutta",
"Jibitesh",
""
],
[
"Järv",
"Laur",
""
]
] | The braneworld model of gravity is well-known for several notable cosmological features such as self-acceleration originating from a geometric and not matter source, effective dark energy behavior with phantom characteristics but not leading to a Big-Rip singularity, rough resemblance to the $\Lambda$CDM evolution, etc... |
1310.3120 | Mengyao Wang | Mengyao Wang, Haixing Miao, Andreas Freise, Yanbei Chen | Sensitivity of intracavity filtering schemes for detecting gravitational
waves | 10 pages, 10 figures | Phys. Rev. D 89, 062009 (2014) | 10.1103/PhysRevD.89.062009 | null | gr-qc physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider enhancing the sensitivity of future gravitational-wave detectors
by adding optical filters inside the signal-recycling cavity -- an intracavity
filtering scheme, which coherently feeds the sideband signal back to the
interferometer with a proper frequency-dependent phase. We study three cases of
such a sc... | [
{
"created": "Fri, 11 Oct 2013 13:38:32 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Apr 2014 13:06:49 GMT",
"version": "v2"
}
] | 2014-04-03 | [
[
"Wang",
"Mengyao",
""
],
[
"Miao",
"Haixing",
""
],
[
"Freise",
"Andreas",
""
],
[
"Chen",
"Yanbei",
""
]
] | We consider enhancing the sensitivity of future gravitational-wave detectors by adding optical filters inside the signal-recycling cavity -- an intracavity filtering scheme, which coherently feeds the sideband signal back to the interferometer with a proper frequency-dependent phase. We study three cases of such a sche... |
2111.00106 | Hollis Williams | Hollis Williams | Recent Developments in the Penrose Conjecture | Corrected some errors and typos | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We survey recent developments towards a proof of the Penrose conjecture and
results on Penrose-type and other geometric inequalities for quasi-local masses
in general relativity.
| [
{
"created": "Fri, 29 Oct 2021 22:28:18 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Nov 2021 15:18:03 GMT",
"version": "v2"
}
] | 2021-11-23 | [
[
"Williams",
"Hollis",
""
]
] | We survey recent developments towards a proof of the Penrose conjecture and results on Penrose-type and other geometric inequalities for quasi-local masses in general relativity. |
2205.08767 | Chunshan Lin | Robert Brandenberger, Paola C. M. Delgado, Alexander Ganz, Chunshan
Lin | Graviton to Photon Conversion via Parametric Resonance | 7 pages, 2 figures; v2 remarks added; v3 version accepted by Physics
of the Dark Universe | Physics of the Dark Universe, Volume 40, May 2023, 101202 | 10.1016/j.dark.2023.101202 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We study the parametric resonance excitation of the electromagnetic field by
a gravitational wave. We show that there is narrow band resonance. For an
electromagnetic field in the vacuum the resonance occurs only in the second
band, and its strength is thus suppressed by two powers of amplitude of the
gravitational w... | [
{
"created": "Wed, 18 May 2022 07:26:14 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jun 2022 09:44:10 GMT",
"version": "v2"
},
{
"created": "Tue, 28 Mar 2023 07:44:13 GMT",
"version": "v3"
}
] | 2023-03-29 | [
[
"Brandenberger",
"Robert",
""
],
[
"Delgado",
"Paola C. M.",
""
],
[
"Ganz",
"Alexander",
""
],
[
"Lin",
"Chunshan",
""
]
] | We study the parametric resonance excitation of the electromagnetic field by a gravitational wave. We show that there is narrow band resonance. For an electromagnetic field in the vacuum the resonance occurs only in the second band, and its strength is thus suppressed by two powers of amplitude of the gravitational wav... |
gr-qc/9712005 | Giuseppe Bimonte | G. Bimonte, S. Capozziello, V. Man'ko and G. Marmo | Cosmological waveguides for gravitational waves | 19 pages, compressed Latex file | Phys.Rev. D58 (1998) 104009 | 10.1103/PhysRevD.58.104009 | DSF-55/97, DSF-US11/97 | gr-qc hep-th | null | We study the linearized equations describing the propagation of gravitational
waves through dust. In the leading order of the WKB approximation, dust behaves
as a non-dispersive, non-dissipative medium. Taking advantage of these
features, we explore the possibility that a gravitational wave from a distant
source gets... | [
{
"created": "Mon, 1 Dec 1997 10:21:22 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Bimonte",
"G.",
""
],
[
"Capozziello",
"S.",
""
],
[
"Man'ko",
"V.",
""
],
[
"Marmo",
"G.",
""
]
] | We study the linearized equations describing the propagation of gravitational waves through dust. In the leading order of the WKB approximation, dust behaves as a non-dispersive, non-dissipative medium. Taking advantage of these features, we explore the possibility that a gravitational wave from a distant source gets t... |
gr-qc/0604030 | Muhammad Akbar Akbar | M. Akbar | symmetries of the Ricci tensor of static space times with maximal
symmetric transverse spaces | 11 pages | null | 10.1088/0253-6102/45/1/018 | null | gr-qc | null | Static space times with maximal symmetric transverse spaces are classified
according to their Ricci collineations. These are investigated for
non-degenerate Ricci tensor ($det.(R_{\alpha}) \neq 0$). It turns out that the
only collineations admitted by these spaces can be ten, seven, six or four.
Some new metrics admi... | [
{
"created": "Fri, 7 Apr 2006 04:10:23 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Akbar",
"M.",
""
]
] | Static space times with maximal symmetric transverse spaces are classified according to their Ricci collineations. These are investigated for non-degenerate Ricci tensor ($det.(R_{\alpha}) \neq 0$). It turns out that the only collineations admitted by these spaces can be ten, seven, six or four. Some new metrics admitt... |
1211.4365 | Maarten van de Meent | Maarten van de Meent | The Geometry of Massless Cosmic Strings | (13 pages, 4 figures) | Phys. Rev. D 87, 025020 (2013) | 10.1103/PhysRevD.87.025020 | ITP-UU-12/44 SPIN-12/41 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the geometry generated by a massless cosmic string. We find that
this is given by a Riemann flat spacetime with a conical singularity along the
worldsheet of the string. The geometry of such a spacetime is completely fixed
by the holonomy of a simple loop wrapping the conical singularity. In the case
of a ma... | [
{
"created": "Mon, 19 Nov 2012 11:27:16 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jan 2013 09:17:01 GMT",
"version": "v2"
}
] | 2013-01-30 | [
[
"van de Meent",
"Maarten",
""
]
] | We study the geometry generated by a massless cosmic string. We find that this is given by a Riemann flat spacetime with a conical singularity along the worldsheet of the string. The geometry of such a spacetime is completely fixed by the holonomy of a simple loop wrapping the conical singularity. In the case of a mass... |
gr-qc/9703069 | Alejandro Jakubi | Luis P. Chimento and Alejandro S. Jakubi | Dissipative cosmological solutions | 17 pages, LaTeX 2.09, 1 figure. To be published in Classical and
Quantum Gravity | Class.Quant.Grav. 14 (1997) 1811-1820 | 10.1088/0264-9381/14/7/016 | null | gr-qc | null | The exact general solution to the Einstein equations in a homogeneous
Universe with a full causal viscous fluid source for the bulk viscosity index
$m=1/2$ is found. We have investigated the asymptotic stability of Friedmann
and de Sitter solutions, the former is stable for $m\ge 1/2$ and the latter for
$m\le 1/2$. T... | [
{
"created": "Tue, 25 Mar 1997 01:07:12 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Chimento",
"Luis P.",
""
],
[
"Jakubi",
"Alejandro S.",
""
]
] | The exact general solution to the Einstein equations in a homogeneous Universe with a full causal viscous fluid source for the bulk viscosity index $m=1/2$ is found. We have investigated the asymptotic stability of Friedmann and de Sitter solutions, the former is stable for $m\ge 1/2$ and the latter for $m\le 1/2$. The... |
1102.2663 | Roberto A. Sussman | Roberto A Sussman | Back-reaction and effective acceleration in generic LTB dust models | Final version accepted for publication in Classical and Quantum
Gravity. 47 pages in IOP LaTeX macros, 12 pdf figures | Classical and Quantum Gravity, vol 28, pp 235002 (2011) | 10.1088/0264-9381/28/23/235002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a thorough examination of the conditions for the existence of
back-reaction and an "effective" acceleration (in the context of Buchert's
averaging formalism) in regular generic spherically symmetric
Lemaitre-Tolman-Bondi (LTB) dust models. By considering arbitrary spherical
comoving domains, we verify rigo... | [
{
"created": "Mon, 14 Feb 2011 02:31:08 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Oct 2011 19:56:04 GMT",
"version": "v2"
}
] | 2015-05-27 | [
[
"Sussman",
"Roberto A",
""
]
] | We provide a thorough examination of the conditions for the existence of back-reaction and an "effective" acceleration (in the context of Buchert's averaging formalism) in regular generic spherically symmetric Lemaitre-Tolman-Bondi (LTB) dust models. By considering arbitrary spherical comoving domains, we verify rigoro... |
gr-qc/9908076 | Hans-Juergen Schmidt | V. Dzhunushaliev, H.-J. Schmidt | 4D Wormhole with Signature Change in the Presence of Extra Dimensions | 8 pages, REVTeX, no figures | Grav.Cosmol. 5 (1999) 187-190 | null | Preprint UNIPO-MATH-99-Aug-31 | gr-qc | null | A regular vacuum solution in 5D gravity on the principal bundle with the U(1)
structural group is proposed as a 4D wormhole. This solution has two null
hypersurfaces where an interchange of the sign of some 5D metric components
happens. For a 4D observer living on the base of this principal bundle this is
a wormhole ... | [
{
"created": "Tue, 31 Aug 1999 07:15:40 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dzhunushaliev",
"V.",
""
],
[
"Schmidt",
"H. -J.",
""
]
] | A regular vacuum solution in 5D gravity on the principal bundle with the U(1) structural group is proposed as a 4D wormhole. This solution has two null hypersurfaces where an interchange of the sign of some 5D metric components happens. For a 4D observer living on the base of this principal bundle this is a wormhole wi... |
2207.00846 | Deng Wang | Deng Wang | Testing the black hole area law with Event Horizon Telescope | 4 pages, 4 figs | null | 10.1209/0295-5075/acbe13 | null | gr-qc astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hawking's black hole area theorem can be tested by monitoring the evolution
of a single black hole over time. Using current imaging observations of two
supermassive black holes M87* and Sgr A* from the Event Horizon Telescope
(EHT), we find their horizon area variation fractions are consistent with the
prediction of ... | [
{
"created": "Sat, 2 Jul 2022 14:33:36 GMT",
"version": "v1"
}
] | 2023-03-15 | [
[
"Wang",
"Deng",
""
]
] | Hawking's black hole area theorem can be tested by monitoring the evolution of a single black hole over time. Using current imaging observations of two supermassive black holes M87* and Sgr A* from the Event Horizon Telescope (EHT), we find their horizon area variation fractions are consistent with the prediction of th... |
2306.10872 | Konstantinos Dialektopoulos F. | Konstantinos F. Dialektopoulos, Daniele Malafarina, Naresh Dadhich | Gravitational Collapse in pure Gauss-Bonnet gravity | 15 pages, 10 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the process of gravitational collapse in pure Gauss-Bonnet gravity.
In the homogeneous dust collapse, we show that the $D=7$ pure Gauss-Bonnet
theory has gravitational dynamics indistinguishable from Einstein's theory in
$D=4$, meaning that collapsing particle feel the same potential as in the
classical 4-di... | [
{
"created": "Mon, 19 Jun 2023 11:56:40 GMT",
"version": "v1"
}
] | 2023-06-21 | [
[
"Dialektopoulos",
"Konstantinos F.",
""
],
[
"Malafarina",
"Daniele",
""
],
[
"Dadhich",
"Naresh",
""
]
] | We study the process of gravitational collapse in pure Gauss-Bonnet gravity. In the homogeneous dust collapse, we show that the $D=7$ pure Gauss-Bonnet theory has gravitational dynamics indistinguishable from Einstein's theory in $D=4$, meaning that collapsing particle feel the same potential as in the classical 4-dime... |
1205.2166 | Philippe G. LeFloch | Ellery Ames, Florian Beyer, James Isenberg, and Philippe G. LeFloch | Quasi-linear symmetric hyperbolic Fuchsian systems in several space
dimensions | 21 pages | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish existence and uniqueness results for the singular initial value
problem associated with a class of quasilinear, symmetric hyperbolic, partial
differential equations of Fuchsian type in several space dimensions. This is an
extension of earlier work by the authors for the same problem in one space
dimensio... | [
{
"created": "Thu, 10 May 2012 06:28:27 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Aug 2012 16:46:57 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Sep 2012 13:28:28 GMT",
"version": "v3"
}
] | 2012-09-06 | [
[
"Ames",
"Ellery",
""
],
[
"Beyer",
"Florian",
""
],
[
"Isenberg",
"James",
""
],
[
"LeFloch",
"Philippe G.",
""
]
] | We establish existence and uniqueness results for the singular initial value problem associated with a class of quasilinear, symmetric hyperbolic, partial differential equations of Fuchsian type in several space dimensions. This is an extension of earlier work by the authors for the same problem in one space dimension. |
gr-qc/0007047 | James Overduin | J. M. Overduin | Solar System Tests of the Equivalence Principle and Constraints on
Higher-Dimensional Gravity | 10 pages, 2 figs. LaTeX, uses PRD style files. To appear in PRD | Phys.Rev.D62:102001,2000 | 10.1103/PhysRevD.62.102001 | null | gr-qc | null | In most studies of equivalence principle violation by solar system bodies, it
is assumed that the ratio of gravitational to inertial mass for a given body
deviates from unity by a parameter Delta which is proportional to its
gravitational self-energy. Here we inquire what experimental constraints can be
set on Delta ... | [
{
"created": "Wed, 19 Jul 2000 18:46:18 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Overduin",
"J. M.",
""
]
] | In most studies of equivalence principle violation by solar system bodies, it is assumed that the ratio of gravitational to inertial mass for a given body deviates from unity by a parameter Delta which is proportional to its gravitational self-energy. Here we inquire what experimental constraints can be set on Delta fo... |
gr-qc/0210104 | Vitorio A. De Lorenci | V. A. De Lorenci, R. Klippert, and Yu. N. Obukhov | On optical black holes in moving dielectrics | 5 pages, 2 figures, revtex4 | Phys.Rev. D68 (2003) 061502 | 10.1103/PhysRevD.68.061502 | null | gr-qc | null | We study the optical paths of the light rays propagating inside a nonlinear
moving dielectric media. For the rapidly moving dielectrics we show the
existence of a distinguished surface which resembles, as far as the light
propagation is concerned, the event horizon of a black hole. Our analysis
clarifies the physical... | [
{
"created": "Wed, 30 Oct 2002 15:04:57 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"De Lorenci",
"V. A.",
""
],
[
"Klippert",
"R.",
""
],
[
"Obukhov",
"Yu. N.",
""
]
] | We study the optical paths of the light rays propagating inside a nonlinear moving dielectric media. For the rapidly moving dielectrics we show the existence of a distinguished surface which resembles, as far as the light propagation is concerned, the event horizon of a black hole. Our analysis clarifies the physical c... |
1904.00780 | Mauricio Bellini | Jes\'us Mart\'in Romero (IFIMAR, CONICET & UNMdP), Luis Santiago Ridao
(IFIMAR, CONICET & UNMdP), Mauricio Bellini (IFIMAR, CONICET & UNMdP) | Geometrization of gravito-electromagnetic interactions from boundary
conditions in the variational principle | improved version, 13 pages, no figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the conditions of integrability when the boundary terms are
considered in the variation of the geometric contribution of the
Einstein-Hilbert action. We explore the emergent physical dynamics that is
obtained when we make a displacement from a background Riemann manifold to an
extended one, on which the non-... | [
{
"created": "Mon, 1 Apr 2019 12:42:57 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Jul 2019 21:27:00 GMT",
"version": "v2"
}
] | 2019-07-22 | [
[
"Romero",
"Jesús Martín",
"",
"IFIMAR, CONICET & UNMdP"
],
[
"Ridao",
"Luis Santiago",
"",
"IFIMAR, CONICET & UNMdP"
],
[
"Bellini",
"Mauricio",
"",
"IFIMAR, CONICET & UNMdP"
]
] | We study the conditions of integrability when the boundary terms are considered in the variation of the geometric contribution of the Einstein-Hilbert action. We explore the emergent physical dynamics that is obtained when we make a displacement from a background Riemann manifold to an extended one, on which the non-me... |
2009.13587 | Leila Graef | L. N Barboza, L. L. Graef, Rudnei O. Ramos | Warm bounce in loop quantum cosmology and the prediction for the
duration of inflation | References added and some typos corrected with respect to the
published version | Phys. Rev. D 102, 103521 (2020) | 10.1103/PhysRevD.102.103521 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study and estimate probabilistic predictions for the duration of the
preinflationary and slow-roll phases after the bounce in loop quantum
cosmology, determining how the presence of radiation in the prebounce phase
affects these results. We present our analysis for different classes of
inflationary potentials that... | [
{
"created": "Mon, 28 Sep 2020 19:08:34 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Nov 2020 19:14:22 GMT",
"version": "v2"
}
] | 2020-11-25 | [
[
"Barboza",
"L. N",
""
],
[
"Graef",
"L. L.",
""
],
[
"Ramos",
"Rudnei O.",
""
]
] | We study and estimate probabilistic predictions for the duration of the preinflationary and slow-roll phases after the bounce in loop quantum cosmology, determining how the presence of radiation in the prebounce phase affects these results. We present our analysis for different classes of inflationary potentials that i... |
2110.13140 | Andrey Nikitenko | A.A.Nikitenko | Some thermodynamic features in space-times with violation of causality | 2 pages, 1 figures | Gravitation and Cosmology. 27. 306-308 (2021) | 10.1134/S0202289321030105 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativity does not prohibit the existence of space-times that
describe time travel. Consideration of such spaces gives rise to a lot of
questions and paradoxes, among which there are thermodynamic ones. This paper
considers two situations that describe time travel, and explains why their
existence does not m... | [
{
"created": "Sun, 24 Oct 2021 13:13:37 GMT",
"version": "v1"
}
] | 2021-11-03 | [
[
"Nikitenko",
"A. A.",
""
]
] | General relativity does not prohibit the existence of space-times that describe time travel. Consideration of such spaces gives rise to a lot of questions and paradoxes, among which there are thermodynamic ones. This paper considers two situations that describe time travel, and explains why their existence does not mea... |
2210.13481 | Pedro Luis Espino | Pedro Luis Espino, Gabriele Bozzola, Vasileios Paschalidis | Quantifying uncertainties in general relativistic magnetohydrodynamic
codes | null | null | 10.1103/PhysRevD.107.104059 | null | gr-qc astro-ph.HE astro-ph.SR hep-ph | http://creativecommons.org/licenses/by/4.0/ | In this paper, we show that similar open-source codes for general
relativistic magnetohydrodynamic (GRMHD) produce different results for key
features of binary neutron star mergers. First, we present a new open-source
version of the publicly available IllinoisGRMHD code that provides support for
realistic, finite tem... | [
{
"created": "Mon, 24 Oct 2022 18:00:01 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Oct 2022 16:36:36 GMT",
"version": "v2"
}
] | 2023-06-14 | [
[
"Espino",
"Pedro Luis",
""
],
[
"Bozzola",
"Gabriele",
""
],
[
"Paschalidis",
"Vasileios",
""
]
] | In this paper, we show that similar open-source codes for general relativistic magnetohydrodynamic (GRMHD) produce different results for key features of binary neutron star mergers. First, we present a new open-source version of the publicly available IllinoisGRMHD code that provides support for realistic, finite tempe... |
gr-qc/0311031 | Fabio Postiglione | R. P. Croce (1), Th. Demma (1), V. Galdi (1), V. Pierro (1), I. M.
Pinto (1) and F. Postiglione (2) ((1) Univ. del Sannio at Benevento IT, (2)
D.I.I.I.E. Univ. di Salerno IT) | Rejection Properties of Stochastic-Resonance-Based Detectors of Weak
Harmonic Signals | 4 pages, 5 figures. Misprints corrected. PACS numbers added. RevTeX4 | Phys.Rev. E69 (2004) 062104 | 10.1103/PhysRevE.69.062104 | null | gr-qc | null | In (V. Galdi et al., Phys. Rev. E57, 6470, 1998) a thorough characterization
in terms of receiver operating characteristics (ROCs) of stochastic-resonance
(SR) detectors of weak harmonic signals of known frequency in additive gaussian
noise was given. It was shown that strobed sign-counting based strategies can
be us... | [
{
"created": "Sat, 8 Nov 2003 22:50:07 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Jun 2004 10:29:24 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Croce",
"R. P.",
""
],
[
"Demma",
"Th.",
""
],
[
"Galdi",
"V.",
""
],
[
"Pierro",
"V.",
""
],
[
"Pinto",
"I. M.",
""
],
[
"Postiglione",
"F.",
""
]
] | In (V. Galdi et al., Phys. Rev. E57, 6470, 1998) a thorough characterization in terms of receiver operating characteristics (ROCs) of stochastic-resonance (SR) detectors of weak harmonic signals of known frequency in additive gaussian noise was given. It was shown that strobed sign-counting based strategies can be used... |
1404.2850 | Gonzalo Olmo | Andrey N. Makarenko, Sergei D. Odintsov, Gonzalo J. Olmo | Little Rip, $\Lambda$CDM and singular dark energy cosmology from
Born-Infeld-$f(R)$ gravity | 7 pages, 5 figures. This version accepted in Phys. Lett. B | Phys.Lett. B734 (2014) 36-40 | 10.1016/j.physletb.2014.05.024 | IFIC/14-27 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study late-time cosmic accelerating dynamics from Born-Infeld-$f(R)$
gravity in a simplified conformal approach. We find that a variety of cosmic
efects such as Little Rip, $\Lambda$CDM universe and dark energy cosmology with
finite-time future singularities may occur. Unlike the convenient Born-Infeld
gravity whe... | [
{
"created": "Thu, 10 Apr 2014 15:41:37 GMT",
"version": "v1"
},
{
"created": "Tue, 13 May 2014 19:31:54 GMT",
"version": "v2"
}
] | 2014-05-29 | [
[
"Makarenko",
"Andrey N.",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Olmo",
"Gonzalo J.",
""
]
] | We study late-time cosmic accelerating dynamics from Born-Infeld-$f(R)$ gravity in a simplified conformal approach. We find that a variety of cosmic efects such as Little Rip, $\Lambda$CDM universe and dark energy cosmology with finite-time future singularities may occur. Unlike the convenient Born-Infeld gravity where... |
2111.08495 | Jay Solanki | Jay Solanki | Gravitational Collapse of Anisotropic Compact Stars in Modified $ f(R) $
Gravity | null | Eur. Phys. J. Plus 137, 557 (2022) | 10.1140/epjp/s13360-022-02784-7 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The physically realistic model of compact stars undergoing gravitational
collapse in $ f(R) $ gravity has been developed. We consider a more general
model $ R + f(R) = R + k R^m $ and describe the interior space-time of
gravitationally collapsing stars with separable-form of metric admitting
homothetic killing vector... | [
{
"created": "Mon, 15 Nov 2021 14:43:30 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Nov 2021 16:16:08 GMT",
"version": "v2"
}
] | 2022-05-17 | [
[
"Solanki",
"Jay",
""
]
] | The physically realistic model of compact stars undergoing gravitational collapse in $ f(R) $ gravity has been developed. We consider a more general model $ R + f(R) = R + k R^m $ and describe the interior space-time of gravitationally collapsing stars with separable-form of metric admitting homothetic killing vector. ... |
1611.00131 | Behnam Pourhassan | Behnam Pourhassan and Mir Faizal | Thermodynamics of a Sufficient Small Singly Spinning Kerr-AdS Black Hole | 21 pages, 11 figures. Accepted for publication in Nucl. Phys. B
(NUPHB 13899) | Nucl. Phys. B 913, 834 (2016) | 10.1016/j.nuclphysb.2016.10.013 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we will analyze the thermodynamics of a small singly spinning
Kerr-AdS black hole. As the black hole will be sufficient small, its
temperature will be large and so we can not neglect the effects of thermal
fluctuations. We will demonstrate that these thermal fluctuations correct the
entropy of singly s... | [
{
"created": "Tue, 1 Nov 2016 05:29:43 GMT",
"version": "v1"
}
] | 2016-11-14 | [
[
"Pourhassan",
"Behnam",
""
],
[
"Faizal",
"Mir",
""
]
] | In this paper, we will analyze the thermodynamics of a small singly spinning Kerr-AdS black hole. As the black hole will be sufficient small, its temperature will be large and so we can not neglect the effects of thermal fluctuations. We will demonstrate that these thermal fluctuations correct the entropy of singly spi... |
2408.07617 | Katy Clough Dr | Katy Clough | New Horizons for Psi: Studying fundamental fields with numerical
relativity | Comments welcome. 20 pages, 5 figures. See
https://github.com/GRTLCollaboration/engrenage/wiki/New-Horizons-for-Psi-workshop
for supporting material | null | null | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This set of notes was designed to accompany two hours of lectures and
practical exercises at the New Horizons for Psi workshop in Lisbon in July 2024
entitled "Studying fundamental fields with numerical relativity". Numerical
relativity is a tool used to help understand the behaviours of metric and
matter fields in d... | [
{
"created": "Wed, 14 Aug 2024 15:32:10 GMT",
"version": "v1"
}
] | 2024-08-15 | [
[
"Clough",
"Katy",
""
]
] | This set of notes was designed to accompany two hours of lectures and practical exercises at the New Horizons for Psi workshop in Lisbon in July 2024 entitled "Studying fundamental fields with numerical relativity". Numerical relativity is a tool used to help understand the behaviours of metric and matter fields in dyn... |
gr-qc/9208011 | null | Jong H. Kung | Comparison of the Sachs-Wolfe Effect for Gaussian and Non-Gaussian
Fluctuations | 16 pages | Phys.Rev.D47:409-415,1993 | 10.1103/PhysRevD.47.409 | report # CfA 3435 | gr-qc astro-ph | null | A consequence of non-Gaussian perturbations on the Sachs-Wolfe effect is
studied. For a particular power spectrum, predicted Sachs-Wolfe effects are
calculated for two cases: Gaussian (random phase) configuration, and a specific
kind of non-Gaussian configuration. We obtain a result that the Sachs-Wolfe
effect for th... | [
{
"created": "Fri, 28 Aug 1992 17:36:37 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Kung",
"Jong H.",
""
]
] | A consequence of non-Gaussian perturbations on the Sachs-Wolfe effect is studied. For a particular power spectrum, predicted Sachs-Wolfe effects are calculated for two cases: Gaussian (random phase) configuration, and a specific kind of non-Gaussian configuration. We obtain a result that the Sachs-Wolfe effect for the ... |
1908.10316 | Pierre-Henri Chavanis | Giuseppe Alberti and Pierre-Henri Chavanis | Caloric curves of classical self-gravitating systems in general
relativity | null | Phys. Rev. E 101, 052105 (2020) | 10.1103/PhysRevE.101.052105 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We determine the caloric curves of classical self-gravitating systems at
statistical equilibrium in general relativity. In the classical limit, the
caloric curves of a self-gravitating gas depend on a unique parameter
$\nu=GNm/Rc^2$, called the compactness parameter, where $N$ is the particle
number and $R$ the syste... | [
{
"created": "Tue, 27 Aug 2019 16:44:40 GMT",
"version": "v1"
}
] | 2020-05-20 | [
[
"Alberti",
"Giuseppe",
""
],
[
"Chavanis",
"Pierre-Henri",
""
]
] | We determine the caloric curves of classical self-gravitating systems at statistical equilibrium in general relativity. In the classical limit, the caloric curves of a self-gravitating gas depend on a unique parameter $\nu=GNm/Rc^2$, called the compactness parameter, where $N$ is the particle number and $R$ the system'... |
gr-qc/0312088 | Joseph Romano | LIGO Scientific Collaboration: B. Abbott, et al | Analysis of First LIGO Science Data for Stochastic Gravitational Waves | 26 pages, 17 figures | Phys.Rev.D69:122004,2004 | 10.1103/PhysRevD.69.122004 | null | gr-qc | null | We present the analysis of between 50 and 100 hrs of coincident
interferometric strain data used to search for and establish an upper limit on
a stochastic background of gravitational radiation. These data come from the
first LIGO science run, during which all three LIGO interferometers were
operated over a 2-week pe... | [
{
"created": "Fri, 19 Dec 2003 18:00:01 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"LIGO Scientific Collaboration",
"",
""
],
[
"Abbott",
"B.",
""
]
] | We present the analysis of between 50 and 100 hrs of coincident interferometric strain data used to search for and establish an upper limit on a stochastic background of gravitational radiation. These data come from the first LIGO science run, during which all three LIGO interferometers were operated over a 2-week peri... |
1311.4051 | Puxun Wu | Kaituo Zhang, Puxun Wu and Hongwei Yu | Emergent universe in spatially flat cosmological model | 16 pages, 8 figures | JCAP01(2014)048 | 10.1088/1475-7516/2014/01/048 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The scenario of an emergent universe provides a promising resolution to the
big bang singularity in universes with positive or negative spatial curvature.
It however remains unclear whether the scenario can be successfully implemented
in a spatially flat universe which seems to be favored by present cosmological
obse... | [
{
"created": "Sat, 16 Nov 2013 12:28:45 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Feb 2014 11:10:14 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Zhang",
"Kaituo",
""
],
[
"Wu",
"Puxun",
""
],
[
"Yu",
"Hongwei",
""
]
] | The scenario of an emergent universe provides a promising resolution to the big bang singularity in universes with positive or negative spatial curvature. It however remains unclear whether the scenario can be successfully implemented in a spatially flat universe which seems to be favored by present cosmological observ... |
0904.4368 | Harvey S. Reall | Mahdi Godazgar, Harvey S. Reall | Algebraically special axisymmetric solutions of the higher-dimensional
vacuum Einstein equation | 28 pages | Class.Quant.Grav.26:165009,2009 | 10.1088/0264-9381/26/16/165009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A d-dimensional spacetime is "axisymmetric" if it possesses an SO(d-2)
isometry group whose orbits are (d-3)-spheres. In this paper, algebraically
special, axisymmetric solutions of the higher dimensional vacuum Einstein
equation (with cosmological constant) are investigated. Necessary and
sufficient conditions for s... | [
{
"created": "Tue, 28 Apr 2009 11:34:59 GMT",
"version": "v1"
}
] | 2009-11-19 | [
[
"Godazgar",
"Mahdi",
""
],
[
"Reall",
"Harvey S.",
""
]
] | A d-dimensional spacetime is "axisymmetric" if it possesses an SO(d-2) isometry group whose orbits are (d-3)-spheres. In this paper, algebraically special, axisymmetric solutions of the higher dimensional vacuum Einstein equation (with cosmological constant) are investigated. Necessary and sufficient conditions for sta... |
1911.06183 | Ignazio Ciufolini | Ignazio Ciufolini, Erricos C. Pavlis, Giampiero Sindoni, John Ries,
Antonio Paolozzi, Rolf Koenig, Richard Matzner | A new laser-ranged satellite for General Relativity and Space Geodesy
II. Monte Carlo Simulations and covariance analyses of the LARES 2 Experiment | 15 pages and 6 figures. arXiv admin note: text overlap with
arXiv:1310.2601 | Eur. Phys. J. Plus (2017) 132: 337 | 10.1140/epjp/i2017-11636-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the previous paper we have introduced the LARES 2 space experiment. The
LARES 2 laser-ranged satellite is planned for a launch in 2019 with the new
VEGA C launch vehicle of the Italian Space Agency (ASI), ESA and ELV. The main
objectives of the LARES 2 experiment are accurate measurements of General
Relativity, gr... | [
{
"created": "Tue, 12 Nov 2019 14:39:30 GMT",
"version": "v1"
}
] | 2019-11-15 | [
[
"Ciufolini",
"Ignazio",
""
],
[
"Pavlis",
"Erricos C.",
""
],
[
"Sindoni",
"Giampiero",
""
],
[
"Ries",
"John",
""
],
[
"Paolozzi",
"Antonio",
""
],
[
"Koenig",
"Rolf",
""
],
[
"Matzner",
"Richard",
""
]
... | In the previous paper we have introduced the LARES 2 space experiment. The LARES 2 laser-ranged satellite is planned for a launch in 2019 with the new VEGA C launch vehicle of the Italian Space Agency (ASI), ESA and ELV. The main objectives of the LARES 2 experiment are accurate measurements of General Relativity, grav... |
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