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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9304003 | Stephen P. Braham | Redouane Fakir | Gravity-Wave Watching | 17pp, plain LaTeX, UBCTP-93-005 | Astrophys.J. 426 (1994) 74-78 | 10.1086/174040 | null | gr-qc astro-ph | null | It is suggested that gravity waves could, in several cases, be detected by
means of already (or shortly to be) available technology, independently of
current efforts of detection. The present is a follow-up on a recently
suggested detection strategy based on gravity-wave-induced deviations of null
geodesics. The new ... | [
{
"created": "Fri, 2 Apr 1993 20:04:59 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Sep 1993 18:06:21 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Fakir",
"Redouane",
""
]
] | It is suggested that gravity waves could, in several cases, be detected by means of already (or shortly to be) available technology, independently of current efforts of detection. The present is a follow-up on a recently suggested detection strategy based on gravity-wave-induced deviations of null geodesics. The new de... |
gr-qc/0609105 | Alberto Vecchio | K. A. Arnaud, S. Babak, J. G. Baker, M. J. Benacquista, N. J. Cornish,
C. Cutler, S. L. Larson, B. S. Sathyaprakash, M. Vallisneri, A. Vecchio and
J-Y. Vinet (The Mock LISA Data Challenge Task Force) | The Mock LISA Data Challenges: An overview | 6 pages, in Proceedings of the Sixth International LISA Symposium
(AIP, 2006) | AIPConf.Proc.873:619-624,2006 | 10.1063/1.2405108 | null | gr-qc | null | The LISA International Science Team Working Group on Data Analysis
(LIST-WG1B) is sponsoring several rounds of mock data challenges, with the
purposeof fostering the development of LISA data analysis capabilities, and of
demonstrating technical readiness for the maximum science exploitation of the
LISA data. The firs... | [
{
"created": "Mon, 25 Sep 2006 17:45:50 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Arnaud",
"K. A.",
"",
"The Mock LISA Data Challenge Task Force"
],
[
"Babak",
"S.",
"",
"The Mock LISA Data Challenge Task Force"
],
[
"Baker",
"J. G.",
"",
"The Mock LISA Data Challenge Task Force"
],
[
"Benacquista",
"M. J.",
"",
"The ... | The LISA International Science Team Working Group on Data Analysis (LIST-WG1B) is sponsoring several rounds of mock data challenges, with the purposeof fostering the development of LISA data analysis capabilities, and of demonstrating technical readiness for the maximum science exploitation of the LISA data. The first ... |
gr-qc/9511057 | Thomas Thiemann | Thomas Thiemann | Reality conditions inducing transforms for quantum gauge field theory
and quantum gravity | Latex, 23 pages | Class.Quant.Grav. 13 (1996) 1383-1404 | 10.1088/0264-9381/13/6/012 | CGPG-95/11-4, HUTMP-95/B-348 | gr-qc hep-th | null | For various theories, in particular gauge field theories, the algebraic form
of the Hamiltonian simplifies considerably if one writes it in terms of certain
complex variables. Also general relativity when written in the new canonical
variables introduced by Ashtekar belongs to that category, the Hamiltonian
being rep... | [
{
"created": "Tue, 21 Nov 1995 23:50:39 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Thiemann",
"Thomas",
""
]
] | For various theories, in particular gauge field theories, the algebraic form of the Hamiltonian simplifies considerably if one writes it in terms of certain complex variables. Also general relativity when written in the new canonical variables introduced by Ashtekar belongs to that category, the Hamiltonian being repla... |
gr-qc/9710067 | Victor Berezin | V.A.Berezin (Institute for Nuclear Research, Moscow, Russia),
A.M.Boyarsky. A.Yu.Neronov (Moscow State Univ., Russia) | Towards the mass spectrum of quantum black holes and wormholes | Talk given on the Second international conference ``Quantum field
theory and gravitation'', July 28 -August 2, 1997, Tomsk, Russia | null | null | null | gr-qc | null | The quantum black hole model with a self-gravitating spherically symmetric
thin dust shell as a source is considered. The shell Hamiltonian constraint is
written and the corresponding Schroedinger equation is obtained. This equation
appeared to be a finite differences equation. Its solutions are required to be
analyt... | [
{
"created": "Mon, 13 Oct 1997 16:09:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Berezin",
"V. A.",
"",
"Institute for Nuclear Research, Moscow, Russia"
],
[
"Neronov",
"A. M. Boyarsky. A. Yu.",
"",
"Moscow State Univ., Russia"
]
] | The quantum black hole model with a self-gravitating spherically symmetric thin dust shell as a source is considered. The shell Hamiltonian constraint is written and the corresponding Schroedinger equation is obtained. This equation appeared to be a finite differences equation. Its solutions are required to be analytic... |
gr-qc/0212112 | Kirill Bronnikov | K.A. Bronnikov and Sung-Won Kim | Possible wormholes in a brane world | 7 pages, revtex4. Submitted to Phys. Rev. D | Phys.Rev. D67 (2003) 064027 | 10.1103/PhysRevD.67.064027 | null | gr-qc hep-th | null | The condition R=0, where R is the four-dimensional scalar curvature, is used
for obtaining a large class (with an arbitrary function of r) of static,
spherically symmetric Lorentzian wormhole metrics. The wormholes are globally
regular and traversable, can have throats of arbitrary size and can be both
symmetric and ... | [
{
"created": "Fri, 27 Dec 2002 07:37:07 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Kim",
"Sung-Won",
""
]
] | The condition R=0, where R is the four-dimensional scalar curvature, is used for obtaining a large class (with an arbitrary function of r) of static, spherically symmetric Lorentzian wormhole metrics. The wormholes are globally regular and traversable, can have throats of arbitrary size and can be both symmetric and as... |
0802.1356 | Bahram Mashhoon | Bahram Mashhoon | Time-Varying Gravitomagnetism | 10 pages; v2: slightly expanded version accepted for publication in
Class. Quantum Grav | Class.Quant.Grav.25:085014,2008 | 10.1088/0264-9381/25/8/085014 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Time-varying gravitomagnetic fields are considered within the linear
post-Newtonian approach to general relativity. A simple model is developed in
which the gravitomagnetic field of a localized mass-energy current varies
linearly with time. The implications of this temporal variation of the source
for the precession ... | [
{
"created": "Sun, 10 Feb 2008 22:58:07 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Mar 2008 00:57:10 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Mashhoon",
"Bahram",
""
]
] | Time-varying gravitomagnetic fields are considered within the linear post-Newtonian approach to general relativity. A simple model is developed in which the gravitomagnetic field of a localized mass-energy current varies linearly with time. The implications of this temporal variation of the source for the precession of... |
2105.01614 | Kent Yagi | Kent Yagi and Michael Stepniczka | Neutron Stars in Scalar-Tensor Theories: Analytic Scalar Charges and
Universal Relations | 13 pages, 9 figures; accepted for publication in Phys. Rev. D | Phys. Rev. D 104, 044017 (2021) | 10.1103/PhysRevD.104.044017 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Neutron stars are ideal astrophysical sources to probe general relativity due
to their large compactnesses and strong gravitational fields. For example,
binary pulsar and gravitational wave observations have placed stringent bounds
on certain scalar-tensor theories in which a massless scalar field is coupled
to the m... | [
{
"created": "Tue, 4 May 2021 16:42:19 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jul 2021 00:43:06 GMT",
"version": "v2"
}
] | 2021-08-11 | [
[
"Yagi",
"Kent",
""
],
[
"Stepniczka",
"Michael",
""
]
] | Neutron stars are ideal astrophysical sources to probe general relativity due to their large compactnesses and strong gravitational fields. For example, binary pulsar and gravitational wave observations have placed stringent bounds on certain scalar-tensor theories in which a massless scalar field is coupled to the met... |
gr-qc/9601044 | null | T. Shirafuji, G.G.L. Nashed and K. Hayashi | Energy of General Spherically Symmetric Solution in Tetrad Theory of
Gravitation | 18 pages, LaTeX; published in Prog. Theor. Phys. 95 No.3 (1996) | Prog.Theor.Phys. 95 (1996) 665-678 | 10.1143/PTP.95.665 | STUPP--95--141, KITASATO--95--1 | gr-qc | null | We find the most general, spherically symmetric solution in a special class
of tetrad theory of gravitation. The tetrad gives the Schwarzschild metric. The
energy is calculated by the superpotential method and by the Euclidean
continuation method. We find that unless the time-space components of the
tetrad go to zero... | [
{
"created": "Mon, 29 Jan 1996 08:28:10 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Shirafuji",
"T.",
""
],
[
"Nashed",
"G. G. L.",
""
],
[
"Hayashi",
"K.",
""
]
] | We find the most general, spherically symmetric solution in a special class of tetrad theory of gravitation. The tetrad gives the Schwarzschild metric. The energy is calculated by the superpotential method and by the Euclidean continuation method. We find that unless the time-space components of the tetrad go to zero f... |
1712.00785 | Carlos Vega | Gregory J. Galloway, Carlos Vega | Rigidity in vacuum under conformal symmetry | 9 pages | null | 10.1007/s11005-018-1079-7 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Moitvated in part by [3], in this note we obtain a rigidity result for
globally hyperbolic vacuum spacetimes in arbitrary dimension that admit a
timelike conformal Killing vector field. Specifically, we show that if M is a
Ricci flat, timelike geodesically complete spacetime with compact Cauchy
surfaces that admits a... | [
{
"created": "Sun, 3 Dec 2017 16:05:44 GMT",
"version": "v1"
}
] | 2018-05-09 | [
[
"Galloway",
"Gregory J.",
""
],
[
"Vega",
"Carlos",
""
]
] | Moitvated in part by [3], in this note we obtain a rigidity result for globally hyperbolic vacuum spacetimes in arbitrary dimension that admit a timelike conformal Killing vector field. Specifically, we show that if M is a Ricci flat, timelike geodesically complete spacetime with compact Cauchy surfaces that admits a t... |
gr-qc/0205060 | Olivier Sarbach | Claudia Moreno, Dario Nunez, and Olivier Sarbach | Kerr-Schild type initial data for black holes with angular momenta | 13 pages, 3 figures. Revised version. To appear in Classical and
Quantum Gravity | Class.Quant.Grav. 19 (2002) 6059-6073 | 10.1088/0264-9381/19/23/312 | null | gr-qc | null | Generalizing previous work we propose how to superpose spinning black holes
in a Kerr-Schild initial slice. This superposition satisfies several physically
meaningful limits, including the close and the far ones. Further we consider
the close limit of two black holes with opposite angular momenta and explicitly
solve... | [
{
"created": "Wed, 15 May 2002 20:43:16 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Oct 2002 17:32:17 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Moreno",
"Claudia",
""
],
[
"Nunez",
"Dario",
""
],
[
"Sarbach",
"Olivier",
""
]
] | Generalizing previous work we propose how to superpose spinning black holes in a Kerr-Schild initial slice. This superposition satisfies several physically meaningful limits, including the close and the far ones. Further we consider the close limit of two black holes with opposite angular momenta and explicitly solve t... |
gr-qc/0110122 | Paola Zizzi | P. A. Zizzi | Ultimate Internets | 16 pages | null | null | null | gr-qc quant-ph | null | In a previous paper (gr-qc/0103002), the inflationary universe was described
as a quantum growing network (QGN). Here, we propose our view of the QGN as the
"ultimate Internet", as it saturates the quantum limits to computation. Also,
we enlight some features of the QGN which are related to: i) the problem of
causali... | [
{
"created": "Tue, 30 Oct 2001 23:19:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Zizzi",
"P. A.",
""
]
] | In a previous paper (gr-qc/0103002), the inflationary universe was described as a quantum growing network (QGN). Here, we propose our view of the QGN as the "ultimate Internet", as it saturates the quantum limits to computation. Also, we enlight some features of the QGN which are related to: i) the problem of causality... |
1404.4642 | Michael Coughlin | Michael Coughlin, Nelson Christensen, Jonathan Gair, Shivaraj
Kandhasamy, Eric Thrane | Method for estimation of gravitational-wave transient model parameters
in frequency-time maps | null | null | 10.1088/0264-9381/31/16/165012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A common technique for detection of gravitational-wave signals is searching
for excess power in frequency-time maps of gravitational-wave detector data. In
the event of a detection, model selection and parameter estimation will be
performed in order to explore the properties of the source. In this paper, we
develop a... | [
{
"created": "Thu, 17 Apr 2014 20:26:02 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Coughlin",
"Michael",
""
],
[
"Christensen",
"Nelson",
""
],
[
"Gair",
"Jonathan",
""
],
[
"Kandhasamy",
"Shivaraj",
""
],
[
"Thrane",
"Eric",
""
]
] | A common technique for detection of gravitational-wave signals is searching for excess power in frequency-time maps of gravitational-wave detector data. In the event of a detection, model selection and parameter estimation will be performed in order to explore the properties of the source. In this paper, we develop a B... |
2202.00847 | Craig Cahillane | Craig Cahillane and Georgia Mansell | Review of the Advanced LIGO gravitational wave observatories leading to
observing run four | 33 pages, 7 figures, 181 references | Galaxies 2022, 10(1), 36; | 10.3390/galaxies10010036 | LIGO DCC P2100483 | gr-qc astro-ph.IM physics.ins-det | http://creativecommons.org/licenses/by/4.0/ | Gravitational waves from binary black hole and neutron star mergers are being
regularly detected. As of 2021, ninety confident gravitational wave detections
have been made by the LIGO and Virgo detectors. Work is ongoing to further
increase the sensitivity of the detectors for the fourth observing run,
including inst... | [
{
"created": "Wed, 2 Feb 2022 01:51:41 GMT",
"version": "v1"
}
] | 2022-03-15 | [
[
"Cahillane",
"Craig",
""
],
[
"Mansell",
"Georgia",
""
]
] | Gravitational waves from binary black hole and neutron star mergers are being regularly detected. As of 2021, ninety confident gravitational wave detections have been made by the LIGO and Virgo detectors. Work is ongoing to further increase the sensitivity of the detectors for the fourth observing run, including instal... |
0711.1535 | Friedrich W. Hehl | Friedrich W. Hehl and Yuri N. Obukhov | Elie Cartan's torsion in geometry and in field theory, an essay | 38 pages of latex with 13 figures | null | null | null | gr-qc | null | We review the application of torsion in field theory. First we show how the
notion of torsion emerges in differential geometry. In the context of a Cartan
circuit, torsion is related to translations similar as curvature to rotations.
Cartan's investigations started by analyzing Einsteins general relativity
theory and... | [
{
"created": "Fri, 9 Nov 2007 20:47:02 GMT",
"version": "v1"
}
] | 2007-11-12 | [
[
"Hehl",
"Friedrich W.",
""
],
[
"Obukhov",
"Yuri N.",
""
]
] | We review the application of torsion in field theory. First we show how the notion of torsion emerges in differential geometry. In the context of a Cartan circuit, torsion is related to translations similar as curvature to rotations. Cartan's investigations started by analyzing Einsteins general relativity theory and b... |
1407.5894 | Lorenzo Iorio | Lorenzo Iorio | Is the recently proposed Mars-sized perturber at $65-80~\textrm{AU}$
ruled out by the Cassini ranging data? | LaTex2e, 10 pages, no tables, 2 figures. Accepted for publication in
the Research Topic "From Comets to Pluto and Beyond: Kuiper Belt Objects and
Investigations" of Frontiers in Astronomy and Space Sciences | Front. Astron. Space Sci. 4:28 2017 | 10.3389/fspas.2017.00028 | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, the existence of a pointlike pertuber PX with
$1~m_\textrm{Mars}\lesssim m_\textrm{X}\lesssim 2.4~m_\oplus$ supposedly moving
at $65-80~\textrm{AU}$ along a moderately inclined orbit has been hypothesized
in order to explain certain features of the midplane of the Kuiper Belt Objects
(KBOs). We preliminaril... | [
{
"created": "Sat, 19 Jul 2014 18:37:43 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Aug 2014 07:54:24 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Oct 2017 14:35:30 GMT",
"version": "v3"
},
{
"created": "Wed, 4 Oct 2017 13:13:10 GMT",
"version": "v4"
}
] | 2017-10-30 | [
[
"Iorio",
"Lorenzo",
""
]
] | Recently, the existence of a pointlike pertuber PX with $1~m_\textrm{Mars}\lesssim m_\textrm{X}\lesssim 2.4~m_\oplus$ supposedly moving at $65-80~\textrm{AU}$ along a moderately inclined orbit has been hypothesized in order to explain certain features of the midplane of the Kuiper Belt Objects (KBOs). We preliminarily ... |
2405.10359 | Paulo Luz | Paulo Luz and Sante Carloni | Non-comoving description of adiabatic radial perturbations of
relativistic stars | 22 pages, 5 figures | null | null | null | gr-qc astro-ph.SR hep-th | http://creativecommons.org/licenses/by/4.0/ | We study adiabatic, radial perturbations of static, self-gravitating perfect
fluids within the theory of general relativity employing a new perturbative
formalism. We show that by considering a radially static observer, the
description of the perturbations can be greatly simplified with respect to the
standard comovi... | [
{
"created": "Thu, 16 May 2024 18:00:00 GMT",
"version": "v1"
}
] | 2024-05-20 | [
[
"Luz",
"Paulo",
""
],
[
"Carloni",
"Sante",
""
]
] | We study adiabatic, radial perturbations of static, self-gravitating perfect fluids within the theory of general relativity employing a new perturbative formalism. We show that by considering a radially static observer, the description of the perturbations can be greatly simplified with respect to the standard comoving... |
2305.00007 | Sen Guo | Sen Guo, Yu-Xiang Huang, and Guo-Ping Li | Optical appearance of the Schwarzschild black hole in the string cloud
context | 10 pages, 7 figures | Chin.Phys.C Vol:47, 065105 (2023) | 10.1088/1674-1137/accad5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The image of a black hole (BH) consists of direct and secondary images that
depend on the observer position. We investigate the optical appearance of a
Schwarzschild BH in the context of a string cloud to reveal how the BH's
observable characteristics are influenced by the inclination angle, string
cloud parameter, a... | [
{
"created": "Fri, 28 Apr 2023 07:44:36 GMT",
"version": "v1"
}
] | 2023-05-02 | [
[
"Guo",
"Sen",
""
],
[
"Huang",
"Yu-Xiang",
""
],
[
"Li",
"Guo-Ping",
""
]
] | The image of a black hole (BH) consists of direct and secondary images that depend on the observer position. We investigate the optical appearance of a Schwarzschild BH in the context of a string cloud to reveal how the BH's observable characteristics are influenced by the inclination angle, string cloud parameter, and... |
gr-qc/9501012 | Gravity Research Group | A. Burinskii, R.P. Kerr | Nonstationary Kerr Congruences | 17 pages., AmS-TeX | null | null | null | gr-qc | null | The Kerr solution is defined by a null congruence which is geodesic and shear
free and has a singular line contained in a bounded region of space. A
generalization of the Kerr congruence for nonstationary case is obtained. We
find a nonstationary shear free geodesic null congruence which is generated by
a given analy... | [
{
"created": "Fri, 13 Jan 1995 15:02:11 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Burinskii",
"A.",
""
],
[
"Kerr",
"R. P.",
""
]
] | The Kerr solution is defined by a null congruence which is geodesic and shear free and has a singular line contained in a bounded region of space. A generalization of the Kerr congruence for nonstationary case is obtained. We find a nonstationary shear free geodesic null congruence which is generated by a given analyti... |
gr-qc/0201025 | Vojtich Pravda | V. Pravda, A. Pravdova | On the spinning C-metric | 12 pages, 7 figures, RevTeX 4 | null | 10.1142/9789812776938_0008 | null | gr-qc | null | Physical interpretation of some stationary and non-stationary regions of the
spinning C-metric is presented. They represent different spacetime regions of a
uniformly accelerated Kerr black hole.
Stability of geodesics corresponding to equilibrium points in a general
stationary spacetime with an additional symmetry... | [
{
"created": "Tue, 8 Jan 2002 15:51:33 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Pravda",
"V.",
""
],
[
"Pravdova",
"A.",
""
]
] | Physical interpretation of some stationary and non-stationary regions of the spinning C-metric is presented. They represent different spacetime regions of a uniformly accelerated Kerr black hole. Stability of geodesics corresponding to equilibrium points in a general stationary spacetime with an additional symmetry is ... |
gr-qc/0605145 | I-Ching Yang | I-Ching Yang | On the Energy of Vaidya Space-time | Latex, 10 pages | Chin.J.Phys.45:497,2006 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we calculate the energy distribution of six cases of
Vaidya-solutions in the M{\o}ller prescription. Except the energy complex of
M{\o}ller for the monopole solution vanishes everywhere, for other solutions
have non-zero energy component, only the energy distributions of the de Sitter
and anti-de Sitter... | [
{
"created": "Tue, 30 May 2006 01:54:45 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Jun 2006 01:38:43 GMT",
"version": "v2"
},
{
"created": "Fri, 20 Mar 2009 17:04:54 GMT",
"version": "v3"
}
] | 2011-01-27 | [
[
"Yang",
"I-Ching",
""
]
] | In this paper we calculate the energy distribution of six cases of Vaidya-solutions in the M{\o}ller prescription. Except the energy complex of M{\o}ller for the monopole solution vanishes everywhere, for other solutions have non-zero energy component, only the energy distributions of the de Sitter and anti-de Sitter s... |
2105.11349 | Victor Varela | Victor Varela and Lorenzo Leal | Simultaneous determination of mass parameter and radial marker in
Schwarzschild geometry | null | null | 10.1088/1361-6404/ac3f41 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that mass parameter and radial coordinate values can be indirectly
measured in thought experiments performed in Schwarzschild spacetime, without
using the Newtonian limit of general relativity or approximations based on
Euclidean geometry. Our approach involves different proper time quantifcations
as well as ... | [
{
"created": "Mon, 24 May 2021 15:35:57 GMT",
"version": "v1"
},
{
"created": "Mon, 31 May 2021 12:09:12 GMT",
"version": "v2"
}
] | 2022-02-02 | [
[
"Varela",
"Victor",
""
],
[
"Leal",
"Lorenzo",
""
]
] | We show that mass parameter and radial coordinate values can be indirectly measured in thought experiments performed in Schwarzschild spacetime, without using the Newtonian limit of general relativity or approximations based on Euclidean geometry. Our approach involves different proper time quantifcations as well as so... |
1209.1962 | Roberto A. Sussman | Roberto A. Sussman | Weighed scalar averaging in LTB dust models, part I: statistical
fluctuations and gravitational entropy | 27 pages in IOP format, 1 figure. Matches version accepted for
publication in Classical and Quantum Gravity | Classical and Quantum Gravity, 30 (2013) 065015 | 10.1088/0264-9381/30/6/065015 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a weighed scalar average formalism ("q-average") for the study
of the theoretical properties and the dynamics of spherically symmetric
Lemaitre-Tolman-Bondi (LTB) dust models models. The "q-scalars" that emerge by
applying the q-averages to the density, Hubble expansion and spatial curvature
(which are c... | [
{
"created": "Mon, 10 Sep 2012 12:27:30 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Jan 2013 01:57:52 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Feb 2013 23:43:01 GMT",
"version": "v3"
}
] | 2015-06-11 | [
[
"Sussman",
"Roberto A.",
""
]
] | We introduce a weighed scalar average formalism ("q-average") for the study of the theoretical properties and the dynamics of spherically symmetric Lemaitre-Tolman-Bondi (LTB) dust models models. The "q-scalars" that emerge by applying the q-averages to the density, Hubble expansion and spatial curvature (which are com... |
gr-qc/0210014 | Archana Pai | K. Rajesh Nayak, A. Pai, S. V. Dhurandhar and J-Y. Vinet | Improving the Sensitivity of LISA | 16 pages, 10 figures, Submitted to Class. Quant. Gravity | Class.Quant.Grav. 20 (2003) 1217-1232 | 10.1088/0264-9381/20/7/301 | null | gr-qc | null | It has been shown in the past, that the six Doppler data streams obtained
LISA configuration can be combined by appropriately delaying the data streams
for cancelling the laser frequency noise. Raw laser noise is several orders of
magnitude above the other noises and thus it is essential to bring it down to
the level... | [
{
"created": "Fri, 4 Oct 2002 16:49:54 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Nayak",
"K. Rajesh",
""
],
[
"Pai",
"A.",
""
],
[
"Dhurandhar",
"S. V.",
""
],
[
"Vinet",
"J-Y.",
""
]
] | It has been shown in the past, that the six Doppler data streams obtained LISA configuration can be combined by appropriately delaying the data streams for cancelling the laser frequency noise. Raw laser noise is several orders of magnitude above the other noises and thus it is essential to bring it down to the level o... |
1505.01686 | Detlev Buchholz | Detlev Buchholz and Rainer Verch | Unruh versus Tolman: On the heat of acceleration | v3: 11 pages, no figures. Dedicated to the memory of Rudolf Haag.
Version as to appear in Gen. Relat. Gravit | Gen. Relat. Gravit. (2016) 48:32 | 10.1007/s10714-016-2029-2 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the Unruh effect, i.e. the increase in temperature indicated
by a uniformly accelerated thermometer in an inertial vacuum state of a quantum
field, cannot be interpreted as the result of an exchange of heat with a
surrounding gas. Since the vacuum is spatially homogeneous in the accelerated
system it... | [
{
"created": "Thu, 7 May 2015 12:47:50 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Oct 2015 21:40:41 GMT",
"version": "v2"
},
{
"created": "Sat, 5 Mar 2016 11:32:12 GMT",
"version": "v3"
}
] | 2016-03-08 | [
[
"Buchholz",
"Detlev",
""
],
[
"Verch",
"Rainer",
""
]
] | It is shown that the Unruh effect, i.e. the increase in temperature indicated by a uniformly accelerated thermometer in an inertial vacuum state of a quantum field, cannot be interpreted as the result of an exchange of heat with a surrounding gas. Since the vacuum is spatially homogeneous in the accelerated system its ... |
2108.10364 | Andrius Tamosiunas | Andrius Tamosiunas, Chad Briddon, Clare Burrage, Weiguang Cui, Adam
Moss | Chameleon Screening Depends on the Shape and Structure of NFW Halos | 32 pages, 21 figures, 1 table, submitted to JCAP | null | 10.1088/1475-7516/2022/04/047 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Chameleon gravity is an example of a model that gives rise to interesting
phenomenology on cosmological scales while simultaneously possessing a
screening mechanism, allowing it to avoid solar system constraints. Such models
result in non-linear field equations, which can be solved analytically only in
simple highly ... | [
{
"created": "Mon, 23 Aug 2021 19:03:12 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Sep 2021 14:48:52 GMT",
"version": "v2"
},
{
"created": "Sat, 25 Dec 2021 18:50:09 GMT",
"version": "v3"
}
] | 2022-06-15 | [
[
"Tamosiunas",
"Andrius",
""
],
[
"Briddon",
"Chad",
""
],
[
"Burrage",
"Clare",
""
],
[
"Cui",
"Weiguang",
""
],
[
"Moss",
"Adam",
""
]
] | Chameleon gravity is an example of a model that gives rise to interesting phenomenology on cosmological scales while simultaneously possessing a screening mechanism, allowing it to avoid solar system constraints. Such models result in non-linear field equations, which can be solved analytically only in simple highly sy... |
2201.12294 | Jonathan Luk | Jonathan Luk, Sung-Jin Oh, Yakov Shlapentokh-Rothman | A scattering theory approach to Cauchy horizon instability and
applications to mass inflation | 34 pages, 2 figures; minor revisions | null | 10.1007/s00023-022-01216-7 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the strong cosmic censorship conjecture, we study the linear
scalar wave equation in the interior of subextremal strictly charged
Reissner-Nordstr\"om black holes by analyzing a suitably-defined "scattering
map" at $0$ frequency. The method can already be demonstrated in the case of
spherically symmetric... | [
{
"created": "Fri, 28 Jan 2022 18:00:00 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Jun 2022 16:28:18 GMT",
"version": "v2"
}
] | 2023-03-22 | [
[
"Luk",
"Jonathan",
""
],
[
"Oh",
"Sung-Jin",
""
],
[
"Shlapentokh-Rothman",
"Yakov",
""
]
] | Motivated by the strong cosmic censorship conjecture, we study the linear scalar wave equation in the interior of subextremal strictly charged Reissner-Nordstr\"om black holes by analyzing a suitably-defined "scattering map" at $0$ frequency. The method can already be demonstrated in the case of spherically symmetric s... |
1605.02689 | Izzet Sakalli | I. Sakalli and A. Ovgun | Black hole radiation of massive spin-2 particles in (3+1) dimensions | Accepted for publication in The European Physical Journal Plus
{http://www.springer.com/13360}. A typo in Ref.29 has been fixed | Eur. Phys. J. Plus (2016) 131: 184 | 10.1140/epjp/i2016-16184-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to the study of radiation of massive spin-2 boson
(graviton with a nonzero mass) through the event horizon of a generic static
and spherically symmetric black hole in (3+1) dimensions. To this end, we
consider the problem in the framework of quantum tunneling phenomenon. We
evaluate the tunnelin... | [
{
"created": "Mon, 9 May 2016 18:34:16 GMT",
"version": "v1"
},
{
"created": "Sat, 21 May 2016 07:27:23 GMT",
"version": "v2"
}
] | 2016-06-02 | [
[
"Sakalli",
"I.",
""
],
[
"Ovgun",
"A.",
""
]
] | This paper is devoted to the study of radiation of massive spin-2 boson (graviton with a nonzero mass) through the event horizon of a generic static and spherically symmetric black hole in (3+1) dimensions. To this end, we consider the problem in the framework of quantum tunneling phenomenon. We evaluate the tunneling ... |
1608.08214 | Sergey Yu. Vernov | Ekaterina O. Pozdeeva, Maria A. Skugoreva, Alexey V. Toporensky,
Sergey Yu. Vernov | Possible evolution of a bouncing universe in cosmological models with
non-minimally coupled scalar fields | 26 pages, 10 figures, v3: Section 6 and references added, accepted
for publication in JCAP | JCAP 1612 (2016) 006 | 10.1088/1475-7516/2016/12/006 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore dynamics of cosmological models with bounce solutions evolving on
a spatially flat Friedmann-Lemaitre-Robertson-Walker background. We consider
cosmological models that contain the Hilbert-Einstein curvature term, the
induced gravity term with a negative coupled constant, and even polynomial
potentials of t... | [
{
"created": "Mon, 29 Aug 2016 19:51:39 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Oct 2016 13:27:24 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Dec 2016 07:46:24 GMT",
"version": "v3"
}
] | 2016-12-08 | [
[
"Pozdeeva",
"Ekaterina O.",
""
],
[
"Skugoreva",
"Maria A.",
""
],
[
"Toporensky",
"Alexey V.",
""
],
[
"Vernov",
"Sergey Yu.",
""
]
] | We explore dynamics of cosmological models with bounce solutions evolving on a spatially flat Friedmann-Lemaitre-Robertson-Walker background. We consider cosmological models that contain the Hilbert-Einstein curvature term, the induced gravity term with a negative coupled constant, and even polynomial potentials of the... |
1508.07145 | Yungui Gong | Jianmang Lin, Qing Gao and Yungui Gong | The reconstruction of inflationary potentials | use mnras class, more discussions on the motivation are added | Mon. Not. Roy. Astron. Soc. 459 (2016) 4029-4037 | 10.1093/mnras/stw915 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The observational data on the anisotropy of the cosmic microwave background
constraints the scalar spectral tilt $n_s$ and the tensor to scalar ratio $r$
which depend on the first and second derivatives of the inflaton potential. The
information can be used to reconstruct the inflaton potential in the polynomial
form... | [
{
"created": "Fri, 28 Aug 2015 09:33:21 GMT",
"version": "v1"
},
{
"created": "Wed, 4 May 2016 14:46:19 GMT",
"version": "v2"
}
] | 2016-05-20 | [
[
"Lin",
"Jianmang",
""
],
[
"Gao",
"Qing",
""
],
[
"Gong",
"Yungui",
""
]
] | The observational data on the anisotropy of the cosmic microwave background constraints the scalar spectral tilt $n_s$ and the tensor to scalar ratio $r$ which depend on the first and second derivatives of the inflaton potential. The information can be used to reconstruct the inflaton potential in the polynomial form u... |
1709.09181 | Ian Harry | Ian Harry, Juan Calder\'on Bustillo and Alex Nitz | Searching for the full symphony of black hole binary mergers | 17 pages, 7 figures. Updating to match the published version
(published in 2018) | Phys. Rev. D 97, 023004 (2018) | 10.1103/PhysRevD.97.023004 | LIGO Document P1700262 | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Current searches for the gravitational-wave signature of compact binary
mergers rely on matched-filtering data from interferometric observatories with
sets of modelled gravitational waveforms. These searches currently use model
waveforms that do not include the higher-order mode content of the
gravitational-wave sign... | [
{
"created": "Tue, 26 Sep 2017 18:00:10 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Mar 2021 14:47:04 GMT",
"version": "v2"
}
] | 2021-03-02 | [
[
"Harry",
"Ian",
""
],
[
"Bustillo",
"Juan Calderón",
""
],
[
"Nitz",
"Alex",
""
]
] | Current searches for the gravitational-wave signature of compact binary mergers rely on matched-filtering data from interferometric observatories with sets of modelled gravitational waveforms. These searches currently use model waveforms that do not include the higher-order mode content of the gravitational-wave signal... |
gr-qc/9601006 | Carlos Lousto | C.O.Lousto (Univ. Utah) | Some Thermodynamic Aspects of Black Holes and Singularities | 16 pages, RevTeX, 5 compressed figures | Int.J.Mod.Phys. D6 (1997) 575-590 | 10.1142/S0218271897000352 | null | gr-qc astro-ph hep-th | null | We review and correct the classical critical exponents characterizing the
transition from negative to positive black hole's heat capacity at high
charge--angular momentum. We discuss the stability properties of black holes as
a thermodynamic system in equilibrium with a radiation bath (canonical
ensamble) by using th... | [
{
"created": "Fri, 5 Jan 1996 01:22:25 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Jan 1996 22:27:50 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Lousto",
"C. O.",
"",
"Univ. Utah"
]
] | We review and correct the classical critical exponents characterizing the transition from negative to positive black hole's heat capacity at high charge--angular momentum. We discuss the stability properties of black holes as a thermodynamic system in equilibrium with a radiation bath (canonical ensamble) by using the ... |
2210.07276 | Teodor Borislavov Vasilev | Teodor Borislavov Vasilev, Mariam Bouhmadi-L\'opez and Prado
Mart\'in-Moruno | Big rip in shift-symmetric Kinetic Gravity Braiding theories | 6 pages, 2 figures, 1 table. v2: minor modifications in the
conclusions section, no physics changes, matches PLB published version | Phys. Lett. B 838 (2023) 137711 | 10.1016/j.physletb.2023.137711 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We revise the future fate of a group of scalar-tensor theories known as
kinetic gravity braiding models. As it is well-known, these theories can safely
drive the expansion of the universe towards a future de Sitter state if the
corresponding Lagrangian is invariant under constant shifts in the scalar
field. However, ... | [
{
"created": "Thu, 13 Oct 2022 18:09:58 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jan 2023 12:17:58 GMT",
"version": "v2"
}
] | 2023-01-27 | [
[
"Vasilev",
"Teodor Borislavov",
""
],
[
"Bouhmadi-López",
"Mariam",
""
],
[
"Martín-Moruno",
"Prado",
""
]
] | We revise the future fate of a group of scalar-tensor theories known as kinetic gravity braiding models. As it is well-known, these theories can safely drive the expansion of the universe towards a future de Sitter state if the corresponding Lagrangian is invariant under constant shifts in the scalar field. However, th... |
1807.01600 | Mubasher Jamil | Mustapha Azreg-A\"inou, Sumarna Haroon, Mubasher Jamil, Muhammad
Rizwan | Rotating normal and phantom Einstein--Maxwell--dilaton black holes:
Geodesic analysis | 29 pages, 13 figures | Int. J. Mod. Phys. D 28 (2019) 1950063 | 10.1142/S0218271819500639 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Depending on five parameters, rotating counterparts of
Einstein--Maxwell--dilaton black holes are derived. We discuss their physical
and geometric properties and investigate their null and time-like geodesics
including circular orbits. The Lense--Thirring effect is considered.
| [
{
"created": "Tue, 3 Jul 2018 07:38:43 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Dec 2018 11:58:23 GMT",
"version": "v2"
}
] | 2018-12-21 | [
[
"Azreg-Aïnou",
"Mustapha",
""
],
[
"Haroon",
"Sumarna",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Rizwan",
"Muhammad",
""
]
] | Depending on five parameters, rotating counterparts of Einstein--Maxwell--dilaton black holes are derived. We discuss their physical and geometric properties and investigate their null and time-like geodesics including circular orbits. The Lense--Thirring effect is considered. |
1012.2879 | Patricia Schmidt | Patricia Schmidt, Mark Hannam, Sascha Husa, P. Ajith | Tracking the precession of compact binaries from their
gravitational-wave signal | 11 pages, 12 figures, 1 table | Phys.Rev.D84:024046,2011 | 10.1103/PhysRevD.84.024046 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a simple method to track the precession of a black-hole-binary
system, using only information from the gravitational-wave (GW) signal. Our
method consists of locating the frame from which the magnitude of the
$(\ell=2,|m|=2)$ modes is maximized, which we denote the "quadrupole-aligned"
frame. We demonstrat... | [
{
"created": "Mon, 13 Dec 2010 21:10:59 GMT",
"version": "v1"
}
] | 2011-08-12 | [
[
"Schmidt",
"Patricia",
""
],
[
"Hannam",
"Mark",
""
],
[
"Husa",
"Sascha",
""
],
[
"Ajith",
"P.",
""
]
] | We present a simple method to track the precession of a black-hole-binary system, using only information from the gravitational-wave (GW) signal. Our method consists of locating the frame from which the magnitude of the $(\ell=2,|m|=2)$ modes is maximized, which we denote the "quadrupole-aligned" frame. We demonstrate ... |
gr-qc/9809039 | Keisuke Taniguchi | Keisuke Taniguchi, Hideki Asada and Masaru Shibata | Irrotational and Incompressible Ellipsoids in the First Post-Newtonian
Approximation of General Relativity | 33 pages with 3 figures, ptptex, corrected some typos, tables and
figures | Prog.Theor.Phys. 100 (1998) 703-735 | 10.1143/PTP.100.703 | KUNS 1523, OU-TAP 81 | gr-qc | null | First post-Newtonian (1PN) hydrostatic equations for an irrotational fluid
which have been recently derived are solved for an incompressible star. The 1PN
configurations are expressed as a deformation of the Newtonian irrotational
Riemann ellipsoid using Lagrangian displacement vectors introduced by
Chandrasekhar. Fo... | [
{
"created": "Thu, 10 Sep 1998 03:30:15 GMT",
"version": "v1"
},
{
"created": "Sun, 14 Feb 1999 13:26:20 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Taniguchi",
"Keisuke",
""
],
[
"Asada",
"Hideki",
""
],
[
"Shibata",
"Masaru",
""
]
] | First post-Newtonian (1PN) hydrostatic equations for an irrotational fluid which have been recently derived are solved for an incompressible star. The 1PN configurations are expressed as a deformation of the Newtonian irrotational Riemann ellipsoid using Lagrangian displacement vectors introduced by Chandrasekhar. For ... |
gr-qc/0103042 | Osvaldo M. Moreschi | Osvaldo M. Moreschi and Alejandro Perez | Perturbations with angular momentum of Robinson-Trautman spacetimes | 23 pages, no figures | Class.Quant.Grav. 18 (2001) 3701-3720 | 10.1088/0264-9381/18/17/320 | null | gr-qc | null | We study the possible asymptotically flat perturbations of Robinson-Trautman
spacetimes. We differentiate between algebraically special perturbations and
general perturbations. The equations that determine physically realistic
spacetimes with angular momentum are presented.
| [
{
"created": "Tue, 13 Mar 2001 17:46:19 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Moreschi",
"Osvaldo M.",
""
],
[
"Perez",
"Alejandro",
""
]
] | We study the possible asymptotically flat perturbations of Robinson-Trautman spacetimes. We differentiate between algebraically special perturbations and general perturbations. The equations that determine physically realistic spacetimes with angular momentum are presented. |
1702.03864 | Luca Fabbri | Luca Fabbri | Singularity-free spinors in gravity with propagating torsion | 4 pages | Mod.Phys.Lett.A32:1750221(2017) | 10.1142/S0217732317502212 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the most general renormalizable theory of propagating torsion in
Einstein gravity for the Dirac matter distribution and we demonstrate that in
this case torsion is a massive axial-vector field whose coupling to the spinor
gives rise to conditions in terms of which gravitational singularities are not
bound... | [
{
"created": "Mon, 13 Feb 2017 16:40:08 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Dec 2017 13:35:28 GMT",
"version": "v2"
},
{
"created": "Wed, 20 Dec 2017 23:44:00 GMT",
"version": "v3"
},
{
"created": "Fri, 30 Nov 2018 10:49:35 GMT",
"version": "v4"
}
] | 2018-12-03 | [
[
"Fabbri",
"Luca",
""
]
] | We consider the most general renormalizable theory of propagating torsion in Einstein gravity for the Dirac matter distribution and we demonstrate that in this case torsion is a massive axial-vector field whose coupling to the spinor gives rise to conditions in terms of which gravitational singularities are not bound t... |
1608.07136 | Marek A. Abramowicz | Marek A. Abramowicz | Velocity, acceleration and gravity in Einstein's relativity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein's relativity theory demands that all meaningful physical objects
should be defined covariantly, i.e. in a coordinate independent way. Concepts
of relative velocity, acceleration, gravity acceleration and gravity potential
are fundamental in Newton's theory and they are imprinted in everyone's
physical intuit... | [
{
"created": "Thu, 25 Aug 2016 13:31:24 GMT",
"version": "v1"
}
] | 2016-08-26 | [
[
"Abramowicz",
"Marek A.",
""
]
] | Einstein's relativity theory demands that all meaningful physical objects should be defined covariantly, i.e. in a coordinate independent way. Concepts of relative velocity, acceleration, gravity acceleration and gravity potential are fundamental in Newton's theory and they are imprinted in everyone's physical intuitio... |
gr-qc/0608090 | Luca Fabbri | Luca Fabbri | On a Completely Antisymmetric Cartan Torsion Tensor | 11 pages | Annales Fond.Broglie32:215(2007) Special Issue "On Torsion" | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the general structure of metric geometries, and how metricity
implies the complete antisymmetry of Cartan tensor; an application in the frame
of Lie group theory is given. Interpretations of the completely antisymmetric
torsion in physical models are reviewed.
| [
{
"created": "Fri, 18 Aug 2006 16:39:16 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Feb 2008 16:06:29 GMT",
"version": "v2"
},
{
"created": "Tue, 3 May 2011 08:24:47 GMT",
"version": "v3"
},
{
"created": "Tue, 5 Jun 2012 12:15:06 GMT",
"version": "v4"
},
{
"cre... | 2017-11-21 | [
[
"Fabbri",
"Luca",
""
]
] | We discuss the general structure of metric geometries, and how metricity implies the complete antisymmetry of Cartan tensor; an application in the frame of Lie group theory is given. Interpretations of the completely antisymmetric torsion in physical models are reviewed. |
0911.1078 | Sean McWilliams | Sean T. McWilliams, James Ira Thorpe, John G. Baker, and Bernard J.
Kelly | Impact of mergers on LISA parameter estimation for nonspinning black
hole binaries | 16 pages, 9 figures, replaced with version published in Phys. Rev. D | Phys.Rev.D81:064014,2010 | 10.1103/PhysRevD.81.064014 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the precision with which the parameters describing the
characteristics and location of nonspinning black hole binaries can be measured
with the Laser Interferometer Space Antenna (LISA). By using complete waveforms
including the inspiral, merger and ringdown portions of the signals, we find
that LISA w... | [
{
"created": "Thu, 5 Nov 2009 16:58:58 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Apr 2010 19:26:27 GMT",
"version": "v2"
}
] | 2010-04-16 | [
[
"McWilliams",
"Sean T.",
""
],
[
"Thorpe",
"James Ira",
""
],
[
"Baker",
"John G.",
""
],
[
"Kelly",
"Bernard J.",
""
]
] | We investigate the precision with which the parameters describing the characteristics and location of nonspinning black hole binaries can be measured with the Laser Interferometer Space Antenna (LISA). By using complete waveforms including the inspiral, merger and ringdown portions of the signals, we find that LISA wil... |
2402.07998 | Emmanuel Chavez Nambo | Emmanuel Ch\'avez Nambo, Alberto Diez-Tejedor, Armando A. Roque and
Olivier Sarbach | On the linear stability of nonrelativistic selfinteracting boson stars | 15+1 pages and 10 figures. Minor changes were made. It was accepted
in journal Physical Review D | null | 10.1103/PhysRevD.109.104011 | null | gr-qc astro-ph.GA astro-ph.SR math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the linear stability of selfinteracting boson stars in
the nonrelativistic limit of the Einstein-Klein-Gordon theory. For this
purpose, based on a combination of analytic and numerical methods, we determine
the behavior of general linear perturbations around the stationary and
spherically symme... | [
{
"created": "Mon, 12 Feb 2024 19:04:24 GMT",
"version": "v1"
},
{
"created": "Fri, 17 May 2024 16:53:26 GMT",
"version": "v2"
}
] | 2024-05-20 | [
[
"Nambo",
"Emmanuel Chávez",
""
],
[
"Diez-Tejedor",
"Alberto",
""
],
[
"Roque",
"Armando A.",
""
],
[
"Sarbach",
"Olivier",
""
]
] | In this paper we study the linear stability of selfinteracting boson stars in the nonrelativistic limit of the Einstein-Klein-Gordon theory. For this purpose, based on a combination of analytic and numerical methods, we determine the behavior of general linear perturbations around the stationary and spherically symmetr... |
1206.0270 | Gaurav Khanna | Justin McKennon, Gary Forrester, Gaurav Khanna | High Accuracy Gravitational Waveforms from Black Hole Binary Inspirals
Using OpenCL | 8 pages; to appear in NSF XSEDE12 | null | null | null | gr-qc physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is a strong need for high-accuracy and efficient modeling of
extreme-mass-ratio binary black hole systems because these are strong sources
of gravitational waves that would be detected by future observatories. In this
article, we present sample results from our Teukolsky EMRI code: a time-domain
Teukolsky equat... | [
{
"created": "Fri, 1 Jun 2012 18:34:57 GMT",
"version": "v1"
}
] | 2012-06-04 | [
[
"McKennon",
"Justin",
""
],
[
"Forrester",
"Gary",
""
],
[
"Khanna",
"Gaurav",
""
]
] | There is a strong need for high-accuracy and efficient modeling of extreme-mass-ratio binary black hole systems because these are strong sources of gravitational waves that would be detected by future observatories. In this article, we present sample results from our Teukolsky EMRI code: a time-domain Teukolsky equatio... |
1509.01869 | Bahram Mashhoon | B. Mashhoon | Mach's Principle and the Origin of Inertia | 14 pages. Dedicated to Carl Brans in honor of his 80th birthday. To
appear in the Brans Festschrift; v2: typo corrected, published in: At the
Frontier of Spacetime, edited by T. Asselmeyer-Maluga (Springer, 2016),
Chapter 10, pp. 177-187 | Fundamental Theories of Physics 183 (2016) 177-187 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The current status of Mach's principle is discussed within the context of
general relativity. The inertial properties of a particle are determined by its
mass and spin, since these characterize the irreducible unitary representations
of the inhomogeneous Lorentz group. The origin of the inertia of mass and
intrinsic ... | [
{
"created": "Mon, 7 Sep 2015 00:32:02 GMT",
"version": "v1"
},
{
"created": "Tue, 17 May 2016 00:11:17 GMT",
"version": "v2"
}
] | 2020-07-29 | [
[
"Mashhoon",
"B.",
""
]
] | The current status of Mach's principle is discussed within the context of general relativity. The inertial properties of a particle are determined by its mass and spin, since these characterize the irreducible unitary representations of the inhomogeneous Lorentz group. The origin of the inertia of mass and intrinsic sp... |
1503.00718 | Carlos O. Lousto | H. Nakano, J. Healy, C.O. Lousto, Y. Zlochower | Perturbative extraction of gravitational waveforms generated with
Numerical Relativity | 13 pages, 6 figures, Revtex4-1 Added several references and strain
figures | null | 10.1103/PhysRevD.91.104022 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive an analytical expression for extracting the gravitational waveforms
at null infinity using the Weyl scalar $\psi_4$ measured at a finite radius.
Our expression is based on a series solution in orders of 1/r to the equations
for gravitational perturbations about a spinning black hole. We compute this
express... | [
{
"created": "Mon, 2 Mar 2015 21:00:00 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Apr 2015 18:02:19 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Nakano",
"H.",
""
],
[
"Healy",
"J.",
""
],
[
"Lousto",
"C. O.",
""
],
[
"Zlochower",
"Y.",
""
]
] | We derive an analytical expression for extracting the gravitational waveforms at null infinity using the Weyl scalar $\psi_4$ measured at a finite radius. Our expression is based on a series solution in orders of 1/r to the equations for gravitational perturbations about a spinning black hole. We compute this expressio... |
gr-qc/0308024 | Antony C. Searle | Antony C. Searle, Susan M. Scott and David E. McClelland | Spectral Line Removal in the LIGO Data Analysis System (LDAS) | 11 pages, 5 figures, to be published in CQG GWDAW02 proceedings | Class.Quant.Grav. 20 (2003) S721-S730 | 10.1088/0264-9381/20/17/315 | null | gr-qc | null | High power in narrow frequency bands, spectral lines, are a feature of an
interferometric gravitational wave detector's output. Some lines are coherent
between interferometers, in particular, the 2 km and 4 km LIGO Hanford
instruments. This is of concern to data analysis techniques, such as the
stochastic background ... | [
{
"created": "Sat, 9 Aug 2003 07:03:58 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Searle",
"Antony C.",
""
],
[
"Scott",
"Susan M.",
""
],
[
"McClelland",
"David E.",
""
]
] | High power in narrow frequency bands, spectral lines, are a feature of an interferometric gravitational wave detector's output. Some lines are coherent between interferometers, in particular, the 2 km and 4 km LIGO Hanford instruments. This is of concern to data analysis techniques, such as the stochastic background se... |
1705.07459 | Kyohei Kawaguchi | Kyohei Kawaguchi, Koutarou Kyutoku, Hiroyuki Nakano, Masaru Shibata | Extracting the orbital axis from gravitational waves of precessing
binary systems | 12 pages, 8 figures, 1 table, published in PRD | Phys. Rev. D 97, 024017 (2018) | 10.1103/PhysRevD.97.024017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new method for extracting the instantaneous orbital axis only
from gravitational wave strains of precessing binary systems observed from a
particular observer direction. This method enables us to reconstruct the
co-precessing frame waveforms only from observed quantities for the ideal case
that the signa... | [
{
"created": "Sun, 21 May 2017 15:14:10 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Feb 2018 05:08:31 GMT",
"version": "v2"
}
] | 2018-02-20 | [
[
"Kawaguchi",
"Kyohei",
""
],
[
"Kyutoku",
"Koutarou",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Shibata",
"Masaru",
""
]
] | We present a new method for extracting the instantaneous orbital axis only from gravitational wave strains of precessing binary systems observed from a particular observer direction. This method enables us to reconstruct the co-precessing frame waveforms only from observed quantities for the ideal case that the signal-... |
gr-qc/0303074 | Hanno Sahlmann | Hanno Sahlmann and Thomas Thiemann | Irreducibility of the Ashtekar-Isham-Lewandowski representation | 13 pages, no figures | Class.Quant.Grav. 23 (2006) 4453-4472 | 10.1088/0264-9381/23/13/010 | AEI-2003-034, PI-2003-002, CGPG-03/3-3 | gr-qc hep-th math-ph math.MP | null | Much of the work in loop quantum gravity and quantum geometry rests on a
mathematically rigorous integration theory on spaces of distributional
connections. Most notably, a diffeomorphism invariant representation of the
algebra of basic observables of the theory, the Ashtekar-Isham-Lewandowski
representation, has bee... | [
{
"created": "Thu, 20 Mar 2003 16:06:18 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Sahlmann",
"Hanno",
""
],
[
"Thiemann",
"Thomas",
""
]
] | Much of the work in loop quantum gravity and quantum geometry rests on a mathematically rigorous integration theory on spaces of distributional connections. Most notably, a diffeomorphism invariant representation of the algebra of basic observables of the theory, the Ashtekar-Isham-Lewandowski representation, has been ... |
1501.06570 | Vitor Cardoso | Richard Brito, Vitor Cardoso, Paolo Pani | Superradiance -- the 2020 Edition | 281 pages. Second Edition (2020) of the "Lecture Notes in Physics"
book by Springer-Verlag. Bounds on ultralight fields are summarized in Table
4 and kept up to date in this revision, which also updates the discussion of
gravitational-wave observables and plasma effects | Lecture Notes in Physics 971 (2020) | 10.1007/978-3-030-46622-0 | null | gr-qc astro-ph.HE hep-ph hep-th physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Superradiance is a radiation enhancement process that involves dissipative
systems. With a 60 year-old history, superradiance has played a prominent role
in optics, quantum mechanics and especially in relativity and astrophysics. In
General Relativity, black-hole superradiance is permitted by the ergoregion,
that all... | [
{
"created": "Mon, 26 Jan 2015 21:00:09 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Feb 2015 10:34:44 GMT",
"version": "v2"
},
{
"created": "Fri, 4 Sep 2015 12:45:59 GMT",
"version": "v3"
},
{
"created": "Mon, 2 Mar 2020 12:08:32 GMT",
"version": "v4"
},
{
"cre... | 2021-01-11 | [
[
"Brito",
"Richard",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Pani",
"Paolo",
""
]
] | Superradiance is a radiation enhancement process that involves dissipative systems. With a 60 year-old history, superradiance has played a prominent role in optics, quantum mechanics and especially in relativity and astrophysics. In General Relativity, black-hole superradiance is permitted by the ergoregion, that allow... |
2304.09052 | Tamanna Jain | Tamanna Jain | Gravitational scattering upto third post-Newtonian approximation for
conservative dynamics: Scalar-Tensor theories | 10 pages, 1 ancillary file | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the scattering angle $\chi$ for hyperboliclike encounters in
massless Scalar-Tensor (ST) theories up to third post-Newtonian (PN) order for
the conservative part of the dynamics. To calculate the gauge-invariant
scattering angle as a function of energy and orbital angular momentum, we use
the approach of E... | [
{
"created": "Tue, 18 Apr 2023 15:16:09 GMT",
"version": "v1"
}
] | 2023-04-19 | [
[
"Jain",
"Tamanna",
""
]
] | We compute the scattering angle $\chi$ for hyperboliclike encounters in massless Scalar-Tensor (ST) theories up to third post-Newtonian (PN) order for the conservative part of the dynamics. To calculate the gauge-invariant scattering angle as a function of energy and orbital angular momentum, we use the approach of Eff... |
1201.6213 | Eduardo Guendelman I | E. I. Guendelman | Extra Dimensional Curvature Supression of the Effective Four Dimensional
Vacuum Energy Density | 8 pages | null | 10.1088/0264-9381/29/10/105007 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Considering a very large number of extra dimensions, $N\rightarrow \infty$,
we show that in the effective four dimensional picture, to leading order in
$N$, both the cosmological constant in $N+4$ dimensions and the curvature of
the extra dimensions (curved as spheres) give the same type of contributions.
Furthermore... | [
{
"created": "Mon, 30 Jan 2012 14:03:07 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Guendelman",
"E. I.",
""
]
] | Considering a very large number of extra dimensions, $N\rightarrow \infty$, we show that in the effective four dimensional picture, to leading order in $N$, both the cosmological constant in $N+4$ dimensions and the curvature of the extra dimensions (curved as spheres) give the same type of contributions. Furthermore i... |
gr-qc/9503010 | Kostas Kokkotas | ANDRZEJ KR\'OLAK, KOSTAS D. KOKKOTAS and GERHARD SCH\"AFER | On the detectability of post-Newtonian effects in gravitational-wave
emission of a coalescing binary | 5 pages (16kb), LATEX, to be published in the proccedings of the 17th
Texas Symposium | null | 10.1111/j.1749-6632.1995.tb17593.x | null | gr-qc | null | The effect of the recently obtained 2nd post-Newtonian corrections on the
accuracy of estimation of parameters of the gravitational-wave signal from a
coalescing binary is investigated. It is shown that addition of this correction
degrades considerably the accuracy of determination of individual masses of the
members... | [
{
"created": "Mon, 6 Mar 1995 19:32:21 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"KRÓLAK",
"ANDRZEJ",
""
],
[
"KOKKOTAS",
"KOSTAS D.",
""
],
[
"SCHÄFER",
"GERHARD",
""
]
] | The effect of the recently obtained 2nd post-Newtonian corrections on the accuracy of estimation of parameters of the gravitational-wave signal from a coalescing binary is investigated. It is shown that addition of this correction degrades considerably the accuracy of determination of individual masses of the members o... |
0811.0661 | Molin Liu | Chunxiao Wang, Molin Liu and Hongya Liu | The Numerical Solution of Scalar Field for Nariai Case in 5D Ricci-flat
SdS Black String Space with Polynomial Approximation | 8 pages, 4 figures | Commun.Theor.Phys.50:889-892,2008 | 10.1088/0253-6102/50/4/19 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As one exact candidate of the higher dimensional black hole, the 5D
Ricci-flat Schwarzschild-de Sitter black string space presents something
interesting. In this paper, we give a numerical solution to the real scalar
field around the Nariai black hole by the polynomial approximation. Unlike the
previous tangent appro... | [
{
"created": "Wed, 5 Nov 2008 07:39:14 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Wang",
"Chunxiao",
""
],
[
"Liu",
"Molin",
""
],
[
"Liu",
"Hongya",
""
]
] | As one exact candidate of the higher dimensional black hole, the 5D Ricci-flat Schwarzschild-de Sitter black string space presents something interesting. In this paper, we give a numerical solution to the real scalar field around the Nariai black hole by the polynomial approximation. Unlike the previous tangent approxi... |
gr-qc/9502033 | Gerard Clement | G\'erard Cl\'ement | Wormhole cosmic strings | 17 pages, LaTeX, 4 figures (hard copy available on request) | Phys.Rev. D51 (1995) 6803-6809 | 10.1103/PhysRevD.51.6803 | GCR-95/02/03 | gr-qc astro-ph hep-th | null | We construct regular multi-wormhole solutions to a gravitating $\sigma$ model
in three space-time dimensions, and extend these solutions to cylindrical
traversable wormholes in four and five dimensions. We then discuss the
possibility of identifying wormhole mouths in pairs to give rise to Wheeler
wormholes. Such an ... | [
{
"created": "Fri, 17 Feb 1995 14:51:37 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Clément",
"Gérard",
""
]
] | We construct regular multi-wormhole solutions to a gravitating $\sigma$ model in three space-time dimensions, and extend these solutions to cylindrical traversable wormholes in four and five dimensions. We then discuss the possibility of identifying wormhole mouths in pairs to give rise to Wheeler wormholes. Such an id... |
1902.05079 | Alexandre Pombo | Pedro G. S. Fernandes, Carlos A. R. Herdeiro, Alexandre M. Pombo,
Eugen Radu and Nicolas Sanchis-Gual | Spontaneous scalarisation of charged black holes: coupling dependence
and dynamical features | 18 pages, 8 figures; Some visualizations of the numerical evolutions
can be seen here: http://gravitation.web.ua.pt/node/1657; v2. minor changes,
matches the version published in CQG | null | 10.1088/1361-6382/ab23a1 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spontaneous scalarisation of electrically charged, asymptotically flat
Reissner-Nordstr\"om black holes (BHs) has been recently demonstrated to occur
in Einstein-Maxwell-Scalar (EMS) models. EMS BH scalarisation presents a
technical simplification over the BH scalarisation that has been conjectured to
occur in extend... | [
{
"created": "Wed, 13 Feb 2019 19:00:04 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Aug 2019 15:26:51 GMT",
"version": "v2"
}
] | 2019-09-04 | [
[
"Fernandes",
"Pedro G. S.",
""
],
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Pombo",
"Alexandre M.",
""
],
[
"Radu",
"Eugen",
""
],
[
"Sanchis-Gual",
"Nicolas",
""
]
] | Spontaneous scalarisation of electrically charged, asymptotically flat Reissner-Nordstr\"om black holes (BHs) has been recently demonstrated to occur in Einstein-Maxwell-Scalar (EMS) models. EMS BH scalarisation presents a technical simplification over the BH scalarisation that has been conjectured to occur in extended... |
0908.2090 | Ian Harry | Ian Harry, Bruce Allen, B.S. Sathyaprakash | A stochastic template placement algorithm for gravitational wave data
analysis | 14 pages, 11 figures | Phys.Rev.D80:104014,2009 | 10.1103/PhysRevD.80.104014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents an algorithm for constructing matched-filter template
banks in an arbitrary parameter space. The method places templates at random,
then removes those which are "too close" together. The properties and
optimality of stochastic template banks generated in this manner are
investigated for some simpl... | [
{
"created": "Fri, 14 Aug 2009 16:23:26 GMT",
"version": "v1"
}
] | 2010-04-22 | [
[
"Harry",
"Ian",
""
],
[
"Allen",
"Bruce",
""
],
[
"Sathyaprakash",
"B. S.",
""
]
] | This paper presents an algorithm for constructing matched-filter template banks in an arbitrary parameter space. The method places templates at random, then removes those which are "too close" together. The properties and optimality of stochastic template banks generated in this manner are investigated for some simple ... |
gr-qc/0209087 | Sugumi Kanno | Sugumi Kanno, Jiro Soda | Braneworld Effective Action at Low Energies | 6 pages. Talk presented at the JENAM 2002 Workshop on Varying
Fundamental Constants, Porto, 3rd September 2002. To be published in the
Conference Proceedings | Astrophys.Space Sci. 283 (2003) 481-486 | 10.1023/A:1022556701901 | KUCP0219 | gr-qc hep-th | null | The low energy effective theory for the Randall-Sundrum two-brane system is
investigated with an emphasis on the role of the non-linear radion in the brane
world. It is shown that the gravity on the brane world is described by a
quasi-scalar-tensor theory with a specific coupling function.
| [
{
"created": "Tue, 24 Sep 2002 04:50:59 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Kanno",
"Sugumi",
""
],
[
"Soda",
"Jiro",
""
]
] | The low energy effective theory for the Randall-Sundrum two-brane system is investigated with an emphasis on the role of the non-linear radion in the brane world. It is shown that the gravity on the brane world is described by a quasi-scalar-tensor theory with a specific coupling function. |
2312.06079 | Viqar Husain | Viqar Husain, Hassan Mehmood | General covariance and dynamics with a Gauss law | 8 pages; explanation of missing constraints added; version to appear
in Phys. Rev. D | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We present a 4-dimensional generally covariant gauge theory which leads to
the Gauss constraint but lacks both the Hamiltonian and spatial diffeomorphism
constraints. The canonical theory therefore resembles Yang-Mills theory without
the Hamiltonian. We describe its observables, quantization, and some
generalizations... | [
{
"created": "Mon, 11 Dec 2023 02:59:24 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Feb 2024 16:39:07 GMT",
"version": "v2"
}
] | 2024-02-23 | [
[
"Husain",
"Viqar",
""
],
[
"Mehmood",
"Hassan",
""
]
] | We present a 4-dimensional generally covariant gauge theory which leads to the Gauss constraint but lacks both the Hamiltonian and spatial diffeomorphism constraints. The canonical theory therefore resembles Yang-Mills theory without the Hamiltonian. We describe its observables, quantization, and some generalizations. |
gr-qc/0203063 | Wieslaw Rudnicki | W. Rudnicki, R. J. Budzynski, W. Kondracki | Generalized Strong Curvature Singularities and Cosmic Censorship | LaTeX, 11 pages, no figures, to appear in Mod. Phys. Lett. A | Mod.Phys.Lett. A17 (2002) 387-397 | 10.1142/S021773230200659X | null | gr-qc | null | A new definition of a strong curvature singularity is proposed. This
definition is motivated by the definitions given by Tipler and Krolak, but is
significantly different and more general. All causal geodesics terminating at
these new singularities, which we call generalized strong curvature
singularities, are classi... | [
{
"created": "Tue, 19 Mar 2002 15:17:15 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Rudnicki",
"W.",
""
],
[
"Budzynski",
"R. J.",
""
],
[
"Kondracki",
"W.",
""
]
] | A new definition of a strong curvature singularity is proposed. This definition is motivated by the definitions given by Tipler and Krolak, but is significantly different and more general. All causal geodesics terminating at these new singularities, which we call generalized strong curvature singularities, are classifi... |
2009.07922 | Dmitri Gal'tsov | Igor Bogush, G\'erard Cl\'ement, Dmitri Gal'tsov, Dmitrii Torbunov | Nutty Kaluza-Klein dyons revisited | 45 pages, 22 figures | Phys. Rev. D 103, 064045 (2021) | 10.1103/PhysRevD.103.064045 | LAPTH-043/20 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the previous analysis of (locally) asymptotically flat solutions of
Kaluza-Klein (KK) theory by assuming that the dilaton charge is an independent
parameter. This corresponds to a general nondegenerate matrix of charges within
the geodesic sigma model approach and comes into contact with singular
solutions ... | [
{
"created": "Wed, 16 Sep 2020 20:22:04 GMT",
"version": "v1"
}
] | 2021-03-31 | [
[
"Bogush",
"Igor",
""
],
[
"Clément",
"Gérard",
""
],
[
"Gal'tsov",
"Dmitri",
""
],
[
"Torbunov",
"Dmitrii",
""
]
] | We extend the previous analysis of (locally) asymptotically flat solutions of Kaluza-Klein (KK) theory by assuming that the dilaton charge is an independent parameter. This corresponds to a general nondegenerate matrix of charges within the geodesic sigma model approach and comes into contact with singular solutions of... |
1011.0842 | Valentin Gladush | Valentin D. Gladush | On the Stable Spherically-Symmetric Charged Dust Configurations in
General Relativity | 4 pages, 9 figures | Odessa Astron.Pub.20:47-50,2007 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The radial motion of a self-graviting charged dust and stability condition of
the static charged dust spheres are considered. The stability is possible for
the bound states of the weakly charged layer with abnormal charge with respect
to the active mass.
| [
{
"created": "Wed, 3 Nov 2010 10:43:45 GMT",
"version": "v1"
}
] | 2011-04-14 | [
[
"Gladush",
"Valentin D.",
""
]
] | The radial motion of a self-graviting charged dust and stability condition of the static charged dust spheres are considered. The stability is possible for the bound states of the weakly charged layer with abnormal charge with respect to the active mass. |
1102.5102 | Alexandre Yale | Alexandre Yale | Comment on "Quantum Tunneling Beyond Semiclassical Approximation" by R.
Banerjee and B. R. Majhi (and many others!) | 4 pages, no figures. Comment on arXiv:0805.2220 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss recent work which has found, using a tunneling approach,
higher-order terms in the Hawking temperature. We highlight a few important
issues in the derivation, such as a misleading definition of energy, and
criticize some of the conclusions that have been reached. In particular, we
conclude that contrary to... | [
{
"created": "Thu, 24 Feb 2011 21:06:30 GMT",
"version": "v1"
}
] | 2011-03-02 | [
[
"Yale",
"Alexandre",
""
]
] | We discuss recent work which has found, using a tunneling approach, higher-order terms in the Hawking temperature. We highlight a few important issues in the derivation, such as a misleading definition of energy, and criticize some of the conclusions that have been reached. In particular, we conclude that contrary to m... |
1104.5615 | Ryuichi Fujita | Ryuichi Fujita | Gravitational radiation for extreme mass ratio inspirals to the 14th
post-Newtonian order | 8 pages, 2 figures | Prog. Theor. Phys. 127 (2012), 583-590 | 10.1143/PTP.127.583 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive gravitational waveforms needed to compute the 14th post-Newtonian
(14PN) order energy flux for a particle in circular orbit around a
Schwarzschild black hole, i.e. $v^{28}$ beyond the leading Newtonian
approximation where $v$ is the orbital velocity of a test particle. We
investigate the convergence of the ... | [
{
"created": "Fri, 29 Apr 2011 12:51:19 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Aug 2012 15:40:01 GMT",
"version": "v2"
}
] | 2012-08-28 | [
[
"Fujita",
"Ryuichi",
""
]
] | We derive gravitational waveforms needed to compute the 14th post-Newtonian (14PN) order energy flux for a particle in circular orbit around a Schwarzschild black hole, i.e. $v^{28}$ beyond the leading Newtonian approximation where $v$ is the orbital velocity of a test particle. We investigate the convergence of the en... |
2401.07664 | Murli Manohar Verma Dr. | Utkal Keshari Dash, Bal Krishna Yadav and Murli Manohar Verma | Scalar modes of polarization and speed of gravitational waves in $f(R)$
gravity | 7 pages, 6 figures | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We explore the gravitational waves (GWs) within the framework of the $f(R)$
gravity model represented by $f(R)=R^{1+\delta}/R^\delta_c$ in the weak field
approximation. In this scenario, gravitational waves exhibit an additional
polarization mode beyond the standard transverse-traceless (TT) tensor modes.
We show tha... | [
{
"created": "Mon, 15 Jan 2024 13:11:32 GMT",
"version": "v1"
}
] | 2024-01-17 | [
[
"Dash",
"Utkal Keshari",
""
],
[
"Yadav",
"Bal Krishna",
""
],
[
"Verma",
"Murli Manohar",
""
]
] | We explore the gravitational waves (GWs) within the framework of the $f(R)$ gravity model represented by $f(R)=R^{1+\delta}/R^\delta_c$ in the weak field approximation. In this scenario, gravitational waves exhibit an additional polarization mode beyond the standard transverse-traceless (TT) tensor modes. We show that ... |
1012.4806 | Matt Visser | Gabriel Abreu (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | Some generalizations of the Raychaudhuri equation | 8 pages | Phys.Rev.D83:104016,2011 | 10.1103/PhysRevD.83.104016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Raychaudhuri equation has seen extensive use in general relativity, most
notably in the development of various singularity theorems. In this rather
technical article we shall generalize the Raychaudhuri equation in several
ways. First an improved version of the standard timelike Raychaudhuri equation
is developed... | [
{
"created": "Tue, 21 Dec 2010 21:00:07 GMT",
"version": "v1"
}
] | 2011-05-13 | [
[
"Abreu",
"Gabriel",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | The Raychaudhuri equation has seen extensive use in general relativity, most notably in the development of various singularity theorems. In this rather technical article we shall generalize the Raychaudhuri equation in several ways. First an improved version of the standard timelike Raychaudhuri equation is developed, ... |
gr-qc/9603039 | O. Yu. Shvedov | O.Yu.Shvedov | Exponentially Large Probabilities in Quantum Gravity | 9 pages in LaTeX, 4 figures in PostScript, the brief version of this
paper is to appear in Proceedings of the XXIV ITEP Winter School of Physics | Surveys High Energ.Phys.10:411-416,1997 | 10.1080/01422419708219646 | null | gr-qc hep-th | null | The problem of topology change transitions in quantum gravity is investigated
from the Wheeler-de Witt wave function point of view. It is argued that for all
theories allowing wormhole effects the wave function of the universe is
exponentially large. If the wormhole action is positive, one can try to
overcome this di... | [
{
"created": "Sat, 23 Mar 1996 15:11:04 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Shvedov",
"O. Yu.",
""
]
] | The problem of topology change transitions in quantum gravity is investigated from the Wheeler-de Witt wave function point of view. It is argued that for all theories allowing wormhole effects the wave function of the universe is exponentially large. If the wormhole action is positive, one can try to overcome this diff... |
2106.05736 | Shahar Hod | Shahar Hod | Charged reflecting shells supporting non-minimally coupled massless
scalar field configurations | 10 pages | The European Physical Journal C 80, 408 (2020) | 10.1140/epjc/s10052-020-7981-z | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | We study {\it analytically} the physical and mathematical properties of
spatially regular massless scalar field configurations which are non-minimally
coupled to the electromagnetic field of a spherically symmetric charged
reflecting shell. In particular, the Klein-Gordon wave equation for the
composed
charged-reflec... | [
{
"created": "Thu, 10 Jun 2021 13:34:38 GMT",
"version": "v1"
}
] | 2021-06-16 | [
[
"Hod",
"Shahar",
""
]
] | We study {\it analytically} the physical and mathematical properties of spatially regular massless scalar field configurations which are non-minimally coupled to the electromagnetic field of a spherically symmetric charged reflecting shell. In particular, the Klein-Gordon wave equation for the composed charged-reflecti... |
1205.6348 | Cosimo Bambi | Cosimo Bambi | Probing the space-time geometry around black hole candidates with the
resonance models for high-frequency QPOs and comparison with the
continuum-fitting method | 1+17 pages, 9 figures. v2: refereed version | JCAP 1209:014,2012 | 10.1088/1475-7516/2012/09/014 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Astrophysical black hole candidates are thought to be the Kerr black hole
predicted by General Relativity. In order to confirm the Kerr-nature of these
objects, we need to probe the geometry of the space-time around them and see if
the observations are consistent with the predictions of the Kerr metric. That
can be a... | [
{
"created": "Tue, 29 May 2012 12:44:19 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Sep 2012 15:24:47 GMT",
"version": "v2"
}
] | 2012-09-12 | [
[
"Bambi",
"Cosimo",
""
]
] | Astrophysical black hole candidates are thought to be the Kerr black hole predicted by General Relativity. In order to confirm the Kerr-nature of these objects, we need to probe the geometry of the space-time around them and see if the observations are consistent with the predictions of the Kerr metric. That can be ach... |
1903.04712 | Fernando Izaurieta | Jos\'e Barrientos, Fernando Izaurieta, Eduardo Rodr\'iguez, Omar
Valdivia | Wave Operators, Torsion, and Weitzenb\"ock Identities | 22 pages, 2 figures | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We offer a mathematical toolkit for the study of waves propagating on a
background manifold with nonvanishing torsion. Examples include electromagnetic
and gravitational waves on a spacetime with torsion. The toolkit comprises
generalized versions of the Lichnerowicz-de Rham and the Beltrami wave
operators, and the W... | [
{
"created": "Tue, 12 Mar 2019 03:37:20 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jul 2020 19:53:47 GMT",
"version": "v2"
}
] | 2020-07-23 | [
[
"Barrientos",
"José",
""
],
[
"Izaurieta",
"Fernando",
""
],
[
"Rodríguez",
"Eduardo",
""
],
[
"Valdivia",
"Omar",
""
]
] | We offer a mathematical toolkit for the study of waves propagating on a background manifold with nonvanishing torsion. Examples include electromagnetic and gravitational waves on a spacetime with torsion. The toolkit comprises generalized versions of the Lichnerowicz-de Rham and the Beltrami wave operators, and the Wei... |
2106.02058 | Adriano Vigan\`o | Marco Astorino and Adriano Vigan\`o | Many accelerating distorted black holes | 19 pages, 5 figures. v2: minor corrections, references added | Eur.Phys.J.C 81 (2021) 10, 891 | 10.1140/epjc/s10052-021-09693-6 | IFUM-1092-FT | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | An analytical metric of four-dimensional General Relativity, representing an
array of collinear and accelerating black holes, is constructed with the
inverse scattering method. The solution can be completely regularised from any
conical singularity, thanks to the presence of an external gravitational field.
Therefore... | [
{
"created": "Thu, 3 Jun 2021 18:00:59 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Jun 2021 12:15:00 GMT",
"version": "v2"
}
] | 2023-08-22 | [
[
"Astorino",
"Marco",
""
],
[
"Viganò",
"Adriano",
""
]
] | An analytical metric of four-dimensional General Relativity, representing an array of collinear and accelerating black holes, is constructed with the inverse scattering method. The solution can be completely regularised from any conical singularity, thanks to the presence of an external gravitational field. Therefore t... |
1908.00252 | Sebastian V\"olkel | Sebastian H. V\"olkel and Kostas D. Kokkotas | Scalar Fields and Parametrized Spherically Symmetric Black Holes: Can
one hear the shape of space-time? | Accepted in Physical Review D | null | 10.1103/PhysRevD.100.044026 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study whether parametrized spherically symmetric black hole
solutions in metric theories of gravity can appear to be isospectral when
studying perturbations. From a theory agnostic point of view, the test scalar
field wave equation is the ideal starting point to approach the quasi-normal
mode spectrum... | [
{
"created": "Thu, 1 Aug 2019 08:05:42 GMT",
"version": "v1"
}
] | 2019-09-04 | [
[
"Völkel",
"Sebastian H.",
""
],
[
"Kokkotas",
"Kostas D.",
""
]
] | In this work we study whether parametrized spherically symmetric black hole solutions in metric theories of gravity can appear to be isospectral when studying perturbations. From a theory agnostic point of view, the test scalar field wave equation is the ideal starting point to approach the quasi-normal mode spectrum i... |
2207.09279 | Leandro Gomes G | Fabio Scalco Dias, Leandro Gustavo Gomes, Luis Fernando Mello | Spatially flat universes with isotropic tidal forces | 10 pages, 5 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the dynamics of the spatially flat universes submitted to
isotropic tidal forces and adiabatic expansion under Einstein's equations.
Surprisingly, the tendency to a high Hubble anisotropy at late times starts to
appear as far as we assume the strong energy condition, a characteristic which
becomes domi... | [
{
"created": "Tue, 19 Jul 2022 13:45:03 GMT",
"version": "v1"
}
] | 2022-07-20 | [
[
"Dias",
"Fabio Scalco",
""
],
[
"Gomes",
"Leandro Gustavo",
""
],
[
"Mello",
"Luis Fernando",
""
]
] | We investigate the dynamics of the spatially flat universes submitted to isotropic tidal forces and adiabatic expansion under Einstein's equations. Surprisingly, the tendency to a high Hubble anisotropy at late times starts to appear as far as we assume the strong energy condition, a characteristic which becomes domina... |
1909.02368 | Dimitar Ivanov Mr. | Dimitar Ivanov, Stefano Liberati | Testing Non-minimally Coupled BEC Dark Matter with Gravitational Waves | 28 pages, 2 figures, more detailed explanations, improvements in the
presentation | null | 10.1088/1475-7516/2020/07/065 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the phenomenology associated to non-minimally coupled dark matter.
In particular, we consider the model where the non-minimal coupling arises from
the formation of relativistic Bose-Einstein condensates in high density regions
of dark matter [1]. This non-minimal coupling is of Horndeski type and leads to
a ... | [
{
"created": "Thu, 5 Sep 2019 12:56:17 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Jun 2020 12:36:45 GMT",
"version": "v2"
}
] | 2020-08-05 | [
[
"Ivanov",
"Dimitar",
""
],
[
"Liberati",
"Stefano",
""
]
] | We study the phenomenology associated to non-minimally coupled dark matter. In particular, we consider the model where the non-minimal coupling arises from the formation of relativistic Bose-Einstein condensates in high density regions of dark matter [1]. This non-minimal coupling is of Horndeski type and leads to a lo... |
2309.06249 | Mikhail Smolyakov | Mikhail N. Smolyakov | Asymptotic behavior of solutions and spectrum of states in the quantum
scalar field theory in the Schwarzschild spacetime | 22 pages, 1 figure. v2: minor revision of the text, one reference
added, typos corrected | Phys. Rev. D 108, 105006 (2023) | 10.1103/PhysRevD.108.105006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the study of canonical quantization of a free real massive
scalar field in the Schwarzschild spacetime is continued. The normalization
constants for the eigenfunctions of the corresponding radial equation are
calculated, providing the necessary coefficients for the doubly degenerate
scatteringlike stat... | [
{
"created": "Tue, 12 Sep 2023 14:04:53 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Nov 2023 17:04:30 GMT",
"version": "v2"
}
] | 2023-11-17 | [
[
"Smolyakov",
"Mikhail N.",
""
]
] | In this paper, the study of canonical quantization of a free real massive scalar field in the Schwarzschild spacetime is continued. The normalization constants for the eigenfunctions of the corresponding radial equation are calculated, providing the necessary coefficients for the doubly degenerate scatteringlike states... |
gr-qc/0607106 | Keiichi Akama | Keiichi Akama | Fatal Missing Link from Classical Brane Dynamics to Einstein Gravity and
a Quantum Theoretical Solution | 4 pages, no figure | null | null | SMC-PHYS-175 | gr-qc | null | It is argued that the Einstein equation on a braneworld at low curvature
cannot be derived from its classical brane dynamics (i. e. dynamics of the
brane as a classical object in the higher dimensional spacetime) as far as the
action of the system has smooth low-curvature limit. We discuss possible
solutions to the p... | [
{
"created": "Mon, 24 Jul 2006 12:09:17 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Aug 2006 09:05:54 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Akama",
"Keiichi",
""
]
] | It is argued that the Einstein equation on a braneworld at low curvature cannot be derived from its classical brane dynamics (i. e. dynamics of the brane as a classical object in the higher dimensional spacetime) as far as the action of the system has smooth low-curvature limit. We discuss possible solutions to the pro... |
2205.00408 | Wen-Biao Han | Yuchan Yang, Wen-Biao Han, Qianyun Yun, Peng Xu, Ziren Luo | Tracing Astrophysical Black Hole Seeds and Primordial Black Holes with
LISA-Taiji Network | 8 pages, 13 figures | MNRAS 512, 6217 (2022) | 10.1093/mnras/stac920 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we discuss the improvement that the joint network of LISA and
Taiji could provide on exploring two kinds of black hole formation mechanisms.
For astrophysical origin, we consider light seed and heavy seed scenarios, and
generate populations accordingly. We find that the joint network has the
potential t... | [
{
"created": "Sun, 1 May 2022 06:54:23 GMT",
"version": "v1"
}
] | 2022-05-03 | [
[
"Yang",
"Yuchan",
""
],
[
"Han",
"Wen-Biao",
""
],
[
"Yun",
"Qianyun",
""
],
[
"Xu",
"Peng",
""
],
[
"Luo",
"Ziren",
""
]
] | In this work, we discuss the improvement that the joint network of LISA and Taiji could provide on exploring two kinds of black hole formation mechanisms. For astrophysical origin, we consider light seed and heavy seed scenarios, and generate populations accordingly. We find that the joint network has the potential to ... |
gr-qc/0410093 | Rajesh Nayak K. | S. V. Dhurandhar, K. Rajesh Nayak, S. Koshti and J-Y. Vinet | Fundamentals of the LISA Stable Flight Formation | 9 Pages, 2 Figure Submitted to Classical and Quantum Gravity | Class.Quant.Grav. 22 (2005) 481-488 | 10.1088/0264-9381/22/3/002 | null | gr-qc astro-ph | null | The joint NASA-ESA mission LISA relies crucially on the stability of the
three spacecraft constellation. Each of the spacecraft is in heliocentric
orbits forming a stable triangle. The principles of such a formation flight
have been formulated long ago and analysis performed, but seldom presented if
ever, even to LIS... | [
{
"created": "Tue, 19 Oct 2004 18:21:54 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Dhurandhar",
"S. V.",
""
],
[
"Nayak",
"K. Rajesh",
""
],
[
"Koshti",
"S.",
""
],
[
"Vinet",
"J-Y.",
""
]
] | The joint NASA-ESA mission LISA relies crucially on the stability of the three spacecraft constellation. Each of the spacecraft is in heliocentric orbits forming a stable triangle. The principles of such a formation flight have been formulated long ago and analysis performed, but seldom presented if ever, even to LISA ... |
1608.03273 | Etienne Baffou | E. H. Baffou, M. J. S. Houndjo, and J. Tossa | Exploring stable models in $f(R; T; R_{\mu\nu} T^{\mu\nu})$ gravity | 16 pages, 2 figures | Astrophys Space Sci (2016) 361:1-8 | 10.1007/s10509-016-2958-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine in this paper the stability analysis in $f(R; T;
R_{\mu\nu}T^{\mu\nu})$ modified gravity, where $R$ and $T$ are the Ricci scalar
and the trace of the energy-momentum tensor, respectively. By considering the
flat Friedmann universe, we obtain the corresponding generalized Friedmann
equations and we evaluate... | [
{
"created": "Wed, 10 Aug 2016 10:35:00 GMT",
"version": "v1"
}
] | 2016-12-15 | [
[
"Baffou",
"E. H.",
""
],
[
"Houndjo",
"M. J. S.",
""
],
[
"Tossa",
"J.",
""
]
] | We examine in this paper the stability analysis in $f(R; T; R_{\mu\nu}T^{\mu\nu})$ modified gravity, where $R$ and $T$ are the Ricci scalar and the trace of the energy-momentum tensor, respectively. By considering the flat Friedmann universe, we obtain the corresponding generalized Friedmann equations and we evaluate t... |
1407.5391 | Alessandro D.A.M. Spallicci di Filottrano | Alessandro D.A.M. Spallicci, Patxi Ritter | A fully relativistic radial fall | To appear in Int. J. Geom. Meth. Mod. Phys | 2014, Int. J. Geom. Meth. Mod. Phys., 11, 1450090 | 10.1142/S021988781450090X | null | gr-qc astro-ph.HE math-ph math.MP physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Radial fall has historically played a momentous role. It is one of the most
classical problems, the solutions of which represent the level of understanding
of gravitation in a given epoch. A {\it gedankenexperiment} in a modern frame
is given by a small body, like a compact star or a solar mass black hole,
captured b... | [
{
"created": "Mon, 21 Jul 2014 07:27:05 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Spallicci",
"Alessandro D. A. M.",
""
],
[
"Ritter",
"Patxi",
""
]
] | Radial fall has historically played a momentous role. It is one of the most classical problems, the solutions of which represent the level of understanding of gravitation in a given epoch. A {\it gedankenexperiment} in a modern frame is given by a small body, like a compact star or a solar mass black hole, captured by ... |
2211.11575 | David W. Neilsen | Milinda Fernando, David Neilsen, Yosef Zlochower, Eric W. Hirschmann,
Hari Sundar | Massively parallel simulations of binary black holes with Dendro-GR | null | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present results from the new Dendro-GR code. These include simulations of
binary black hole mergers for mass ratios up to q=16. Dendro-GR uses Wavelet
Adaptive Multi-Resolution (WAMR) to generate an unstructured grid adapted to
the spacetime geometry together with an octree based data structure. We
demonstrate goo... | [
{
"created": "Thu, 17 Nov 2022 23:28:56 GMT",
"version": "v1"
}
] | 2022-11-22 | [
[
"Fernando",
"Milinda",
""
],
[
"Neilsen",
"David",
""
],
[
"Zlochower",
"Yosef",
""
],
[
"Hirschmann",
"Eric W.",
""
],
[
"Sundar",
"Hari",
""
]
] | We present results from the new Dendro-GR code. These include simulations of binary black hole mergers for mass ratios up to q=16. Dendro-GR uses Wavelet Adaptive Multi-Resolution (WAMR) to generate an unstructured grid adapted to the spacetime geometry together with an octree based data structure. We demonstrate good ... |
gr-qc/9506055 | Neil Cornish | N. J. Cornish and J. W. Moffat | Comment on the formation of black holes in nonsymmetric gravity | 6 pages, RevTeX | null | null | UTPT-95-14 | gr-qc | null | We critically examine the claim made by Burko and Ori that black holes are
expected to form in nonsymmetric gravity and find their analysis to be
inconclusive. Their conclusion is a result of the approximations they make, and
not a consequence of the true dynamics of the theory. The approximation they
use fails to ca... | [
{
"created": "Mon, 26 Jun 1995 20:32:09 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cornish",
"N. J.",
""
],
[
"Moffat",
"J. W.",
""
]
] | We critically examine the claim made by Burko and Ori that black holes are expected to form in nonsymmetric gravity and find their analysis to be inconclusive. Their conclusion is a result of the approximations they make, and not a consequence of the true dynamics of the theory. The approximation they use fails to capt... |
1308.5178 | Grasiele Batista Dos Santos | Grasiele B. Santos, Eduardo Bittencourt and Jos\'e M. Salim | Scalar perturbations in a Friedmann-like metric with non-null Weyl
tensor | 14 pages, 1 figure, improved version with a new analysis of the large
wavelength limit. The current version matches the published one | JCAP 06 (2015) 013 | 10.1088/1475-7516/2015/06/013 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a previous work the authors have solved the Einstein equations of General
Relativity for a class of metrics with constant spatial curvature, where it was
found a non vanishing Weyl tensor in the presence of a primordial magnetic
field with an anisotropic pressure component. Here, we perform the perturbative
analys... | [
{
"created": "Fri, 23 Aug 2013 16:45:02 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Sep 2013 19:10:02 GMT",
"version": "v2"
},
{
"created": "Sun, 16 Feb 2014 18:35:59 GMT",
"version": "v3"
},
{
"created": "Sat, 6 Dec 2014 13:52:51 GMT",
"version": "v4"
},
{
"cr... | 2015-06-10 | [
[
"Santos",
"Grasiele B.",
""
],
[
"Bittencourt",
"Eduardo",
""
],
[
"Salim",
"José M.",
""
]
] | In a previous work the authors have solved the Einstein equations of General Relativity for a class of metrics with constant spatial curvature, where it was found a non vanishing Weyl tensor in the presence of a primordial magnetic field with an anisotropic pressure component. Here, we perform the perturbative analysis... |
2405.08522 | Ville Vaskonen | John Ellis, Malcolm Fairbairn, Juan Urrutia and Ville Vaskonen | In Search of the Biggest Bangs since the Big Bang | Awarded Fourth Prize in the 2024 Gravity Research Foundation
Competition for Essays on Gravitation | null | null | KCL-PH-TH/2024-27, CERN-TH-2024-058, AION-REPORT/2024-04 | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many galaxies contain supermassive black holes (SMBHs), whose formation and
history raise many puzzles. Pulsar timing arrays have recently discovered a
low-frequency cosmological "hum" of gravitational waves that may be emitted by
SMBH binary systems, and the JWST and other telescopes have discovered an
unexpectedly ... | [
{
"created": "Tue, 14 May 2024 11:56:26 GMT",
"version": "v1"
}
] | 2024-05-15 | [
[
"Ellis",
"John",
""
],
[
"Fairbairn",
"Malcolm",
""
],
[
"Urrutia",
"Juan",
""
],
[
"Vaskonen",
"Ville",
""
]
] | Many galaxies contain supermassive black holes (SMBHs), whose formation and history raise many puzzles. Pulsar timing arrays have recently discovered a low-frequency cosmological "hum" of gravitational waves that may be emitted by SMBH binary systems, and the JWST and other telescopes have discovered an unexpectedly la... |
1401.8085 | Hafiza Rizwana Kausar | H. Rizwana Kausar and Ifra Noureen | Dissipative Spherical Collapse of Charged Anisotropic Fluid in f(R)
Gravity | 18 pages, Accepted for publication in Eur. Phys. J. C | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This manuscript is devoted to study the combined effect of a viable model,
f(R) = R + \alpha R^n, and electromagnetic field on the instability range of
gravitational collapse. We assume charged anisotropic fluid that dissipate
energy via heat flow and discuss that electromagnetic field, density
inhomogeneity, shear a... | [
{
"created": "Fri, 31 Jan 2014 08:57:14 GMT",
"version": "v1"
}
] | 2014-02-03 | [
[
"Kausar",
"H. Rizwana",
""
],
[
"Noureen",
"Ifra",
""
]
] | This manuscript is devoted to study the combined effect of a viable model, f(R) = R + \alpha R^n, and electromagnetic field on the instability range of gravitational collapse. We assume charged anisotropic fluid that dissipate energy via heat flow and discuss that electromagnetic field, density inhomogeneity, shear and... |
1803.10529 | Melanie Graf | Gregory J. Galloway and Melanie Graf | Rigidity of asymptotically $AdS_2 \times S^2$ spacetimes | 26 pages, v2: minor changes to the introduction and abstract | null | null | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spacetime $AdS_2 \times S^2$ is well known to arise as the 'near horizon'
geometry of the extremal Reissner-Nordstrom solution, and for that reason it
has been studied in connection with the AdS/CFT correspondence. Here we
consider asymptotically $AdS_2 \times S^2$ spacetimes that obey the null energy
condition (... | [
{
"created": "Wed, 28 Mar 2018 11:15:00 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Aug 2018 14:13:57 GMT",
"version": "v2"
}
] | 2018-08-03 | [
[
"Galloway",
"Gregory J.",
""
],
[
"Graf",
"Melanie",
""
]
] | The spacetime $AdS_2 \times S^2$ is well known to arise as the 'near horizon' geometry of the extremal Reissner-Nordstrom solution, and for that reason it has been studied in connection with the AdS/CFT correspondence. Here we consider asymptotically $AdS_2 \times S^2$ spacetimes that obey the null energy condition (or... |
1110.6508 | Gary Gibbons | G. W. Gibbons, M. Vyska | The Application of Weierstrass elliptic functions to Schwarzschild Null
Geodesics | Latex file, 19 pages 4 figures references and two comments added | null | 10.1088/0264-9381/29/6/065016 | DAMTP-2011-89 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we focus on analytical calculations involving null geodesics in
some spherically symmetric spacetimes. We use Weierstrass elliptic functions to
fully describe null geodesics in Schwarzschild spacetime and to derive
analytical formulae connecting the values of radial distance at different
points along th... | [
{
"created": "Sat, 29 Oct 2011 09:04:07 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Nov 2011 18:23:15 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Gibbons",
"G. W.",
""
],
[
"Vyska",
"M.",
""
]
] | In this paper we focus on analytical calculations involving null geodesics in some spherically symmetric spacetimes. We use Weierstrass elliptic functions to fully describe null geodesics in Schwarzschild spacetime and to derive analytical formulae connecting the values of radial distance at different points along the ... |
1907.03090 | Aharon Davidson | Aharon Davidson | From Planck area to graph theory: Topologically distinct black hole
microstates | 6 pages, 5 figures; v2: minor changes, ref added; v3: version
published in PRD (RC) | Phys. Rev. D 100, 081502 (2019) | 10.1103/PhysRevD.100.081502 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We postulate a Planck scale horizon unit area, with no bits of information
locally attached to it, connected but otherwise of free form, and let $n$ such
geometric units compactly tile the black hole horizon. Associated with each
topologically distinct tiling configuration is then a simple, connected,
undirected, unl... | [
{
"created": "Sat, 6 Jul 2019 07:10:34 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Sep 2019 18:46:59 GMT",
"version": "v2"
},
{
"created": "Mon, 21 Oct 2019 10:48:20 GMT",
"version": "v3"
}
] | 2019-10-23 | [
[
"Davidson",
"Aharon",
""
]
] | We postulate a Planck scale horizon unit area, with no bits of information locally attached to it, connected but otherwise of free form, and let $n$ such geometric units compactly tile the black hole horizon. Associated with each topologically distinct tiling configuration is then a simple, connected, undirected, unlab... |
1111.5607 | Gregory L. Comer | G. L. Comer, Patrick Peter, N. Andersson | Cosmological Two-stream Instability | 9 pages, 3 figures. Final version that is published | Physics Letters B 715 (2012) 289 - 292 | 10.1016/j.physletb.2012.07.069 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two-stream instability requires, essentially, two things to operate: a
relative flow between two fluids and some type of interaction between them. In
this letter we provide the first demonstration that this mechanism may be
active in a cosmological context. Building on a recently developed formalism
for cosmological ... | [
{
"created": "Wed, 23 Nov 2011 20:40:42 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Aug 2012 14:47:32 GMT",
"version": "v2"
}
] | 2012-08-28 | [
[
"Comer",
"G. L.",
""
],
[
"Peter",
"Patrick",
""
],
[
"Andersson",
"N.",
""
]
] | Two-stream instability requires, essentially, two things to operate: a relative flow between two fluids and some type of interaction between them. In this letter we provide the first demonstration that this mechanism may be active in a cosmological context. Building on a recently developed formalism for cosmological mo... |
2401.08692 | Zeeshan Gul | Muhammad Zeeshan Gul, Shamaila Rani, Muhammad Adeel and Abdul Jawad | Viable and Stable Compact Stars in $f(\mathcal{Q})$ Theory | 25 pages, 12 figures | Eur. Phys. J. C 84(2024)8 | 10.1140/epjc/s10052-023-12368-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the viability and stability of anisotropic compact
stars in the context of $f(\mathcal{Q})$ theory, where $\mathcal{Q}$ is
non-metricity scalar. We use Finch-Skea solutions to investigate the physical
properties of compact stars. To determine the values of unknown constants, we
match internal ... | [
{
"created": "Sat, 13 Jan 2024 14:17:58 GMT",
"version": "v1"
}
] | 2024-01-18 | [
[
"Gul",
"Muhammad Zeeshan",
""
],
[
"Rani",
"Shamaila",
""
],
[
"Adeel",
"Muhammad",
""
],
[
"Jawad",
"Abdul",
""
]
] | In this paper, we study the viability and stability of anisotropic compact stars in the context of $f(\mathcal{Q})$ theory, where $\mathcal{Q}$ is non-metricity scalar. We use Finch-Skea solutions to investigate the physical properties of compact stars. To determine the values of unknown constants, we match internal sp... |
gr-qc/0408059 | Jan Metzger | Jan Metzger | Numerical computation of constant mean curvature surfaces using finite
elements | 23 pagers, 16 figures, 5 tables. To appear in Classical and quantum
Gravity. Version with full resolution graphics available at
http://www.mathematik.uni-tuebingen.de/~jan/preprints/ | Class.Quant.Grav. 21 (2004) 4625-4646 | 10.1088/0264-9381/21/19/010 | AEI-2004-062 | gr-qc | null | This paper presents a method for computing two-dimensional constant mean
curvature surfaces. The method in question uses the variational aspect of the
problem to implement an efficient algorithm. In principle it is a flow like
method in that it is linked to the gradient flow for the area functional, which
gives relia... | [
{
"created": "Wed, 18 Aug 2004 12:37:58 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Metzger",
"Jan",
""
]
] | This paper presents a method for computing two-dimensional constant mean curvature surfaces. The method in question uses the variational aspect of the problem to implement an efficient algorithm. In principle it is a flow like method in that it is linked to the gradient flow for the area functional, which gives reliabl... |
gr-qc/9507032 | Parthasarathi Mitra | A. Ghosh and P. Mitra | Temperatures of extremal black holes | 11 pages, REVTEX | null | null | P/95-11 | gr-qc hep-th | null | The temperature of an extremal Reissner - Nordstrom black hole is not
restricted by the requirement of absence of a conical singularity. It is
demonstrated how Kruskal-like coordinates may be constructed corresponding to
any temperature whatsoever. A recently discovered stringy extremal black hole
which apparently ha... | [
{
"created": "Fri, 14 Jul 1995 19:31:52 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ghosh",
"A.",
""
],
[
"Mitra",
"P.",
""
]
] | The temperature of an extremal Reissner - Nordstrom black hole is not restricted by the requirement of absence of a conical singularity. It is demonstrated how Kruskal-like coordinates may be constructed corresponding to any temperature whatsoever. A recently discovered stringy extremal black hole which apparently has ... |
gr-qc/0409032 | Edward Malec | Janusz Karkowski and Edward Malec | On conformally flat initial data for Einstein equations | It is explained how the solution reported in version 1 of this paper
is related to the solution of Dain and Friedrich (gr-qc/0102047) | null | null | null | gr-qc | null | We describe conformally flat initial data, with explicitly given analytic
extrinsic curvature solving the vacuum momentum constraints. They follow from a
solution of Dain and Friedrich discovered in 2001. The cylindrically symmetric
subcase of the Bowen-York solution is a subclass of this general configuration.
| [
{
"created": "Tue, 7 Sep 2004 14:26:47 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Sep 2004 15:30:13 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Karkowski",
"Janusz",
""
],
[
"Malec",
"Edward",
""
]
] | We describe conformally flat initial data, with explicitly given analytic extrinsic curvature solving the vacuum momentum constraints. They follow from a solution of Dain and Friedrich discovered in 2001. The cylindrically symmetric subcase of the Bowen-York solution is a subclass of this general configuration. |
0812.2995 | Edwin J. Son | Wontae Kim, Edwin J. Son | Note on cosmology of dimensionally reduced gravitational Chern-Simons | 3 pages, minor changes, references added, version to appear in PRD | Phys.Rev.D79:087501,2009 | 10.1103/PhysRevD.79.087501 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present cosmological solutions from the dimensionally reduced Chern-Simons
term and obtain the smooth transition solution from the decelerated phase (AdS)
to the accelerated phase (dS).
| [
{
"created": "Tue, 16 Dec 2008 08:09:40 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Apr 2009 08:12:14 GMT",
"version": "v2"
}
] | 2009-05-12 | [
[
"Kim",
"Wontae",
""
],
[
"Son",
"Edwin J.",
""
]
] | We present cosmological solutions from the dimensionally reduced Chern-Simons term and obtain the smooth transition solution from the decelerated phase (AdS) to the accelerated phase (dS). |
gr-qc/0212130 | Parampreet Singh | Jeeva Anandan, Naresh Dadhich, Parampreet Singh | Action principle formulation for motion of extended bodies in General
Relativity | Revised version derives Octupole moment force. Some clarifications
and a reference added. To appear in Phys. Rev. D | Phys.Rev.D68:124014,2003 | 10.1103/PhysRevD.68.124014 | null | gr-qc astro-ph hep-th quant-ph | null | We present an action principle formulation for the study of motion of an
extended body in General Relativity in the limit of weak gravitational field.
This gives the classical equations of motion for multipole moments of arbitrary
order coupling to the gravitational field. In particular, a new force due to
the octupo... | [
{
"created": "Tue, 31 Dec 2002 17:18:05 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Jan 2003 10:00:17 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Oct 2003 11:37:20 GMT",
"version": "v3"
}
] | 2011-07-19 | [
[
"Anandan",
"Jeeva",
""
],
[
"Dadhich",
"Naresh",
""
],
[
"Singh",
"Parampreet",
""
]
] | We present an action principle formulation for the study of motion of an extended body in General Relativity in the limit of weak gravitational field. This gives the classical equations of motion for multipole moments of arbitrary order coupling to the gravitational field. In particular, a new force due to the octupole... |
2004.01519 | Shounak Ghosh | Rikpratik Sengupta, Shounak Ghosh, Saibal Ray, B. Mishra and S. K.
Tripathy | Gravastar under the framework of Braneworld Gravity | 12 pages, 5 figures | Phys. Rev. D 102, 024037 (2020) | 10.1103/PhysRevD.102.024037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravastars have been considered as a serious alternative to black holes in
the past couple of decades. Stable models of gravastar have been constructed in
many of the alternate gravity models besides standard General Relativity (GR).
The Randall-Sundrum (RS) braneworld model has been a popular alternative to GR,
spec... | [
{
"created": "Wed, 1 Apr 2020 18:06:43 GMT",
"version": "v1"
}
] | 2020-07-15 | [
[
"Sengupta",
"Rikpratik",
""
],
[
"Ghosh",
"Shounak",
""
],
[
"Ray",
"Saibal",
""
],
[
"Mishra",
"B.",
""
],
[
"Tripathy",
"S. K.",
""
]
] | Gravastars have been considered as a serious alternative to black holes in the past couple of decades. Stable models of gravastar have been constructed in many of the alternate gravity models besides standard General Relativity (GR). The Randall-Sundrum (RS) braneworld model has been a popular alternative to GR, specia... |
gr-qc/0611073 | Andrew Randono | Andrew Randono | Generalizing the Kodama State I: Construction | First part in two part series, 20 pages | null | null | null | gr-qc hep-th | null | The Kodama State is unique in being an exact solution to all the ordinary
constraints of canonical quantum gravity that also has a well defined
semi-classical interpretation as a quantum version of a classical spacetime,
namely (anti)de Sitter space. However, the state is riddled with difficulties
which can be tracke... | [
{
"created": "Tue, 14 Nov 2006 04:56:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Randono",
"Andrew",
""
]
] | The Kodama State is unique in being an exact solution to all the ordinary constraints of canonical quantum gravity that also has a well defined semi-classical interpretation as a quantum version of a classical spacetime, namely (anti)de Sitter space. However, the state is riddled with difficulties which can be tracked ... |
gr-qc/0109093 | Miguel Alcubierre | Mihai Bondarescu, Miguel Alcubierre, Edward Seidel | Isometric embeddings of black hole horizons in three-dimensional flat
space | 11 pages, 12 figures. Includes comments made by referees | Class.Quant.Grav. 19 (2002) 375-392 | 10.1088/0264-9381/19/2/311 | null | gr-qc | null | The geometry of a two-dimensional surface in a curved space can be most
easily visualized by using an isometric embedding in flat three-dimensional
space. Here we present a new method for embedding surfaces with spherical
topology in flat space when such a embedding exists. Our method is based on
expanding the surfac... | [
{
"created": "Fri, 28 Sep 2001 08:25:45 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Nov 2001 07:48:47 GMT",
"version": "v2"
},
{
"created": "Wed, 10 May 2006 07:30:07 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Bondarescu",
"Mihai",
""
],
[
"Alcubierre",
"Miguel",
""
],
[
"Seidel",
"Edward",
""
]
] | The geometry of a two-dimensional surface in a curved space can be most easily visualized by using an isometric embedding in flat three-dimensional space. Here we present a new method for embedding surfaces with spherical topology in flat space when such a embedding exists. Our method is based on expanding the surface ... |
gr-qc/0403112 | Achim Kempf | Achim Kempf | Short-Distance Cutoffs in Curved Space | Talk presented at 10th Marcel Grossmann Meeting, Rio de Janeiro, July
20-26, 2003 | null | 10.1142/9789812704030_0316 | null | gr-qc | null | It is shown that space-time may possess the differentiability properties of
manifolds as well as the ultraviolet finiteness properties of lattices. Namely,
if a field's amplitudes are given on any sufficiently dense set of discrete
points this could already determine the field's amplitudes at all other points
of the ... | [
{
"created": "Tue, 30 Mar 2004 03:48:24 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Kempf",
"Achim",
""
]
] | It is shown that space-time may possess the differentiability properties of manifolds as well as the ultraviolet finiteness properties of lattices. Namely, if a field's amplitudes are given on any sufficiently dense set of discrete points this could already determine the field's amplitudes at all other points of the ma... |
gr-qc/0310027 | T. Padmanabhan | T.Padmanabhan | Quasi normal modes: A simple derivation of the level spacing of the
frequencies | 6 pages | Class.Quant.Grav. 21 (2004) L1 | 10.1088/0264-9381/21/1/L01 | null | gr-qc astro-ph hep-th | null | It is known that the imaginary parts of the frequencies of the quasi normal
modes of the Schwarzschild black hole are equally spaced, with the level
spacing dependent only on the surface gravity. We generalize this result to a
wider class of spacetimes and provide a simple derivation of the imaginary
parts of the fre... | [
{
"created": "Sun, 5 Oct 2003 12:54:52 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Padmanabhan",
"T.",
""
]
] | It is known that the imaginary parts of the frequencies of the quasi normal modes of the Schwarzschild black hole are equally spaced, with the level spacing dependent only on the surface gravity. We generalize this result to a wider class of spacetimes and provide a simple derivation of the imaginary parts of the frequ... |
2110.00903 | Jie Jiang | Aofei Sang and Jie Jiang | Black Hole Zeroth Law in Horndeski Gravity | 6 pages, and this paper has been accepted by PRD | null | 10.1103/PhysRevD.104.084092 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The four laws of black hole mechanics have been put forward for a long time.
However, the zeroth law, which states that the surface gravity of a stationary
black hole is a constant on the event horizon, still lacks universal proof in
various modified gravitational theories. In this paper, we study the zeroth law
{in ... | [
{
"created": "Sun, 3 Oct 2021 01:52:21 GMT",
"version": "v1"
}
] | 2021-11-10 | [
[
"Sang",
"Aofei",
""
],
[
"Jiang",
"Jie",
""
]
] | The four laws of black hole mechanics have been put forward for a long time. However, the zeroth law, which states that the surface gravity of a stationary black hole is a constant on the event horizon, still lacks universal proof in various modified gravitational theories. In this paper, we study the zeroth law {in a ... |
gr-qc/0302019 | Ciprian Dariescu | Ciprian Dariescu (U. of Oregon) | Evolving Maximally Symmetric Spacetime Bubbles from Spontaneous
Z_2-Violation at Electroweak Symmetry Breaking Scale | 43 pages LaTeX, no figures | null | 10.1142/S0218271804003676 | null | gr-qc | null | The Einstein-Gordon equations for Friedmann-Robertson-Walker (FRW) geometries
in feedback reaction with the quartically self-interacting physical field,
arisen from the "inner parity" spontaneous breaking, are explicitly formulated.
The Hamiltonian density non-positive extrema would classically forbid both
spatially ... | [
{
"created": "Thu, 6 Feb 2003 20:03:14 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Dariescu",
"Ciprian",
"",
"U. of Oregon"
]
] | The Einstein-Gordon equations for Friedmann-Robertson-Walker (FRW) geometries in feedback reaction with the quartically self-interacting physical field, arisen from the "inner parity" spontaneous breaking, are explicitly formulated. The Hamiltonian density non-positive extrema would classically forbid both spatially cl... |
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