id large_stringlengths 9 16 | title large_stringlengths 1 382 | abstract large_stringlengths 3 6.09k | publish_date date32 | update_date date32 | categories large listlengths 1 13 | authors large_stringlengths 3 62.8k |
|---|---|---|---|---|---|---|
astro-ph/9507027 | Neutrino pair synchrotron radiation from relativistic electrons in
strong magnetic fields | The emissivity for the neutrino pair synchrotron radiation in strong magnetic
fields has been calculated both analytically and numerically for high densities
and moderate temperatures, as can be found in neutron stars. Under these
conditions, the electrons are relativistic and degenerate. We give here our
results in te... | 1995-07-07 | 2009-10-28 | [
"astro-ph"
] | A. Vidaurre, A. Perez, H. Sivak, J. Bernabeu and J.M. Ibanez |
astro-ph/9507025 | A Stellar Audit: The Computation of Encounter Rates for 47 Tucanae and
omega Centauri | Using King-Mitchie Models, we compute encounter rates between the various
stellar species in the globular clusters $\omega$ Cen, and 47 Tuc. We also
compute event rates for encounters between single stars and a population of
primordial binaries. Using these rates, and what we have learnt from
hydrodynamical simulations... | 1995-07-07 | 2015-06-24 | [
"astro-ph"
] | M.B. Davies, W. Benz |
astro-ph/9507029 | The LMC Supersoft X-Ray Binary RX J0513.9-6951 | A detailed analysis of simultaneous photometric and spectroscopic
observations of the optical counterpart of the LMC "supersoft" X-ray source RX
J0513.9-6951 (identified with HV 5682) is presented. The spectrum is dominated
by He II emission lines and H + He II blends; no He I is observed but several
higher ionization ... | 1995-07-07 | 2015-06-24 | [
"astro-ph"
] | David Crampton, J.B. Hutchings, A.P. Cowley, P.C. Schmidtke, T.K.
McGrath, D. O'Donoghue and M.K. Harrop-Allin |
astro-ph/9507024 | Constraining Peaks in Gaussian Primordial Density Fields: an Application
of the Hoffman-Ribak Method | We develop an algorithm for setting up initial Gaussian random density and
velocity fields containing one or more peaks or dips, in an arbitrary
cosmological scenario. The intention is to generate appropriate initial
conditions for cosmological N-body simulations that focus on the evolution of
the progenitors of the pr... | 1995-07-07 | 2015-06-24 | [
"astro-ph"
] | Rien van de Weygaert and Edmund Bertschinger |
astro-ph/9507019 | Galaxy clusters and microwave background anisotropy | Previous estimates of the microwave background anisotropies produced by
freely falling spherical clusters are discussed. These estimates are based on
the Swiss-Cheese and Tolman-Bondi models. It is proved that these models give
only upper limits to the anisotropies produced by the observed galaxy clusters.
By using sph... | 1995-07-06 | 2015-06-24 | [
"astro-ph"
] | V. Quilis, J.M. Ibanez and D. Saez (Univ. Valencia, Dpto. Astronomia y
Astrofisica) |
astro-ph/9507021 | Spherical Redshift Distortions | Peculiar velocities induce apparent line of sight displacements of galaxies
in redshift space, distorting the pattern of clustering in the radial versus
transverse directions. On large scales, the amplitude of the distortion yields
a measure of the dimensionless linear growth rate $\beta \approx
\Omega^{0.6}/b$, where ... | 1995-07-06 | 2015-06-24 | [
"astro-ph"
] | A. J. S. Hamilton and M. Culhane |
astro-ph/9507018 | Multiplicity among T Tauri stars in OB and T associations: Implications
for binary star formation | We present first results of a survey for companions among X-ray selected
pre-main sequence stars, most of them being weak-line T Tauri stars (WTTS).
These T Tauri stars have been identified in the course of optical follow-up
observations of sources from the ROSAT All Sky Survey associated with star
forming regions. The... | 1995-07-06 | 2016-08-30 | [
"astro-ph"
] | Wolfgang Brandner, Juan M. Alcala, Michael Kunkel, Andrea Moneti, and
Hans Zinnecker |
astro-ph/9507017 | Star Cluster Evolution, Dynamical Age Estimation and the Kinematical
Signature of Star Formation | We use N-body integration to follow the evolution of clusters of 200 binary
systems with different initial half mass radii $R_{0.5}$. We also simulate
single-star clusters. All clusters evolve according to the same $n(t)$ curve,
where $n(t)$ is the number density of stars in the central 2~pc sphere at time
$t$. $n(t)$ ... | 1995-07-06 | 2015-06-24 | [
"astro-ph"
] | Pavel Kroupa |
astro-ph/9507020 | Getting the Measure of the Flatness Problem | The problem of estimating cosmological parameters such as $\Omega$ from noisy
or incomplete data is an example of an inverse problem and, as such, generally
requires a probablistic approach. We adopt the Bayesian interpretation of
probability for such problems and stress the connection between probability and
informati... | 1995-07-06 | 2010-04-06 | [
"astro-ph",
"bayes-an"
] | Guillaume Evrard (Universite Montpellier II, France and Queen Mary and
Westfield College, London), Peter Coles (Queen Mary and Westfield College,
London) |
astro-ph/9507022 | Redshift Distortions and Omega in IRAS Surveys | Redshift space distortions on large scales can be used to measure the linear
growth rate parameter $\ff \approx \Omega^{0.6}/b$. I report here measurements
of such distortions in the IRAS 2 Jy, 1.2 Jy, and QDOT redshift surveys,
finding $\ff = 0.69^{+ .21}_{- .19}$ from a merged QDOT plus 1.2 Jy catalogue.
Unfortunatel... | 1995-07-06 | 2008-02-03 | [
"astro-ph"
] | A. J. S. Hamilton |
astro-ph/9507016 | Secondary Infall: Theory {\it Versus} Simulations | The applicability of the highly idealized secondary infall model to
`realistic' initial conditions is investigated. The collapse of proto-halos
seeded by $3\sigma$ density perturbations to an Einstein--de Sitter universe is
studied here for a variety of scale-free power spectra with spectral indices
ranging from $n=1$ ... | 1995-07-05 | 2009-10-28 | [
"astro-ph"
] | Saleem Zaroubi, Avi Naim, and Yehuda Hoffman |
astro-ph/9507015 | Omega from the COBE-DMR anisotropy maps | We have made a likelihood statistical analysis of the angular correlations in
the {\it COBE}-DMR two-year sky maps by Monte Carlo simulation of the
temperature fluctuations. We assume an open universe and consider as primordial
power spectrum the Harrison-Zeldovich one, $P(k)=Ak$. We find that the flatness
of the unive... | 1995-07-05 | 2015-06-24 | [
"astro-ph"
] | L. Cayon, E. Martinez-Gonzalez, J.L. Sanz, N. Sugiyama, S. Torres |
astro-ph/9507014 | THE CANADA-FRANCE REDSHIFT SURVEY V: Global Properties of the Sample | The photometric and spectroscopic data of the CFRS survey of objects with
17.5 < I_{AB} < 22.5 are combined and analysed. The overall completeness is
85%. The redshift histogram of the sample is presented for 591 field galaxies
with secure redshifts. The median redshift is z = 0.56, and the highest
redshift observed is... | 1995-07-05 | 2016-08-30 | [
"astro-ph"
] | David Crampton, O. Le Fevre, S.J. Lilly and F. Hammer |
astro-ph/9507009 | A method for subtracting foregrounds from multi-frequency CMB sky maps | An improved method for subtracting contaminants from Cosmic Microwave
Background (CMB) sky maps is presented, and used to estimate how well future
experiments will be able to recover the primordial CMB fluctuations. We find
that the naive method of subtracting foregrounds (such as dust emission,
synchrotron radiation, ... | 1995-07-04 | 2015-06-24 | [
"astro-ph"
] | Max Tegmark and George Efstathiou |
astro-ph/9507012 | THE CANADA-FRANCE REDSHIFT SURVEY III: "Single Emission Line" Objects,
Analysis of Repeat Observations, and Spectroscopic Identifications in the
1415+52 and 2215+00 Fields | This paper is one of a series describing the Canada-France Redshift Survey
(CFRS). It is shown how the shape of the continuum around the emission line can
be used to distinguish between [OII] 3727 at z > 0.76 and H$\alpha$ at low
redshift in spectra for which only a single isolated emission line is visible.
Based on th... | 1995-07-04 | 2009-10-28 | [
"astro-ph"
] | S.J. lilly, F. Hammer, O. Le Fevre and David Crampton |
astro-ph/9507011 | THE CANADA-FRANCE REDSHIFT SURVEY II: Spectroscopic Program; Data for
the 0000-00 and 1000+25 Fields | This paper describes the methods used to obtain the spectroscopic data and
construct redshift catalogs for the Canada-France deep Redshift Survey (CFRS).
The full data set consists of more than one thousand spectra, of objects with
17.5 < I_{AB} < 22.5, obtained from deep multi-slit data with the MARLIN and
MOS-SIS spe... | 1995-07-04 | 2016-08-30 | [
"astro-ph"
] | O. Le Fevre, David Crampton, S.J. Lilly, F. Hammer and L. Tresse |
astro-ph/9507013 | THE CANADA-FRANCE REDSHIFT SURVEY IV: Spectroscopic Selection Effects
and 0300+00 Field Spectroscopic Data | Possible surface brightness selection effects in the redshift catalogs of the
Canada-France Redshift Survey are investigated through comparisons of
subsamples of the data. Our analyses demonstrate that the securing of redshifts
is independent of possible biases arising from surface brightness effects
and/or differing g... | 1995-07-04 | 2009-10-28 | [
"astro-ph"
] | F. Hammer, David Crampton, O. Le Fevre and S.J. Lilly |
astro-ph/9507007 | Observational Evidence for Weak Gravitational Lensing by Large Scale
Structure | A single very deep $10'$ field has been imaged to $r \sim 26$. There are 2682
galaxies with $23 \le r \le 26$ with a size significantly larger than the
seeing disk in the field. After correcting for telescope aberrations, possible
guiding errors, and signal degradation due to seeing, I find a polarization
signal of amp... | 1995-07-04 | 2007-05-23 | [
"astro-ph"
] | Jens Verner Villumsen (Max Planck Institute fur Astrophysik, Garching,
Germany) |
astro-ph/9507008 | The Dark Matter, Gas and Galaxy Distributions in Abell 2218: A Weak
Gravitational Lensing and X-ray Analysis | We report on the detection of dark matter in the cluster Abell 2218 using the
weak gravitational distortion of background galaxies. We find a highly
significant, coherent detection of the distortion in the images of the
background galaxies. The inferred 2D mass distribution has a peak that is
coincident with the optica... | 1995-07-04 | 2009-10-28 | [
"astro-ph"
] | G. Squires, N. Kaiser, A. Babul, G. Fahlman, D. Woods, D. M. Neumann,
and H. B\"ohringer |
astro-ph/9507004 | ROSAT observations of PSR 2334+61 in the supernova remnant G114.3+0.3 | We report on the observation of PSR 2334+61 in the soft X-ray domain with
ROSAT. Assuming a power-law spectrum $dN/dE\propto E^{-\alpha}$ with
photon-index $\alpha=2$ we derive an X-ray flux of $f_x=(7.1 \pm 0.2) \times
10^{-14} \hbox{erg s}^{-1}\hbox{cm}^{-2}$ within the $0.1$--$2.4$ keV energy
range. An upper limit f... | 1995-07-04 | 2007-05-23 | [
"astro-ph"
] | W.Becker, K.T.S.Barzier and J.Tr\"umper |
astro-ph/9507005 | Velocity correlation tensor and substructure's statistics around density
peaks | We derive the conditional probability distribution of the peculiar velocity
around a peak of given overdensity in a Gaussian density field. This
distribution characterizes the shear field around local, isolated density
peaks. We use the moments of the velocity distribution to study the spatial
distribution of the escap... | 1995-07-04 | 2007-05-23 | [
"astro-ph"
] | V. Antonuccio-delogu and S. Colafrancesco |
astro-ph/9507010 | The CANADA-FRANCE REDSHIFT SURVEY I: Introduction to the Survey,
Photometric Catalogs and Surface Brightness Selection Effects | The Canada-France Redshift Survey has been undertaken to provide a large
well-defined sample of faint galaxies at high redshift in which the selection
criteria match as closely as possible those of samples of nearby galaxies. The
survey is designed to have a median redshift of z ~ 0.6 corresponding to a
look-back time ... | 1995-07-04 | 2009-10-28 | [
"astro-ph"
] | S.J. Lilly, O. Le Fevre, David Crampton, F. Hammer and L. Tresse |
astro-ph/9507006 | Cold Plus Hot Dark Matter Cosmology in the Light of Solar and
Atmospheric Neutrino Oscillations | We explore the implications of possible neutrino oscillations, as indicated
by the solar and atmospheric neutrino experiments, for the cold plus hot dark
matter scenario of large scale structure formation. We find that there are
essentially three distinct schemes that can accommodate the oscillation data
and which also... | 1995-07-04 | 2008-11-26 | [
"astro-ph",
"hep-ph"
] | K.S. Babu, R.K. Schaefer, and Q. Shafi |
astro-ph/9507001 | A General Analytic Formula for the Spectral Index of the Density
Perturbations produced during Inflation | The standard calculation of the spectrum of density perturbations produced
during inflation assumes that there is only one real dynamical degree of
freedom during inflation. However, there is no reason to believe that this is
actually the case. In this paper we derive general analytic formulae for the
spectrum and spec... | 1995-07-03 | 2009-10-09 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | Misao Sasaki and Ewan D. Stewart |
astro-ph/9507003 | Gauge Invariant Density and Temperature Perturbations in the
Quasi-Newtonian Formulation | We give an improved formalism for calculating the evolution of density
fluctuations and temperature perturbations in flat universes. Our equations are
general enough to treat the perturbations in collisionless relics like massive
neutrinos. We find this formulation to be simpler to use than gauge dependent
and other ga... | 1995-07-03 | 2011-05-12 | [
"astro-ph",
"hep-ph"
] | Robert K. Schaefer and Andrew A. de Laix |
astro-ph/9507002 | FRII Radio Sources in Rich Clusters of Galaxies | A sample of FRII radio sources in rich clusters of galaxies, both at high
(z$\sim$0.5) and low (z$\sim$0) redshift, has been constructed to study the
effect of environment on radio sources. Comparisons are made between the
properties of FRII sources in cluster and non-cluster environments, and between
X-ray clusters wi... | 1995-07-03 | 2007-05-23 | [
"astro-ph"
] | Lin Wan & Ruth A. Daly |
astro-ph/9506147 | The Destruction of a Compact Group of Galaxies | The very high apparent galaxy densities in Hickson compact groups (HCGs)
should produce copious amounts of galaxy-galaxy interaction, if these groups
are bound dynamical units. I examine the evidence for such interactions in HCG
94, a group of seven galaxies with an envelope of diffuse optical light and an
extremely hi... | 1995-07-02 | 2009-10-28 | [
"astro-ph"
] | Rachel A. Pildis (UMich) |
astro-ph/9506146 | Characteristics of Cosmic Time | The nature of cosmic time is illuminated using Hamilton-Jacobi theory for
general relativity. For problems of interest to cosmology, one may solve for
the phase of the wavefunctional by using a line integral in superspace. Each
contour of integration corresponds to a particular choice of time hypersurface,
and each yie... | 1995-07-01 | 2009-10-28 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | D. S. Salopek |
astro-ph/9506142 | Dynamical and radiative properties of astrophysical supersonic jets I.
Cocoon morphologies | We present the results of a numerical analysis of the propagation and
interaction of a supersonic jet with the external medium. We discuss the motion
of the head of the jet into the ambient in different physical conditions,
carrying out calculations with different Mach numbers and density ratios of the
jet to the exter... | 1995-06-30 | 2008-02-03 | [
"astro-ph"
] | S. Massaglia, G. Bodo, A. Ferrari (Osservatorio Astronomico di Torino,
Italy) |
astro-ph/9506145 | Discovery of a Large Gravitational Arc in the X-ray Cluster A2280 | This Letter presents the serendipitous discovery of a large arc in an X-ray
selected cluster detected in the Rosat North Ecliptic Pole (NEP) survey. The
cluster, associated with Abell 2280, is identified as the optical counterpart
of the X-ray source RXJ 1743.5+6341. This object is a medium--distant z=0.326
and luminou... | 1995-06-30 | 2007-05-23 | [
"astro-ph"
] | I. M. Gioia, J. P. Henry, G. A. Luppino, D. I. Clowe, H. Boehringer,
U. G. Briel, W. Voges, J.P. Huchra, H. MacGillivray (Institute for Astronomy,
University of Hawaii,USA; Istituto di Radioastronomia del CNR, Bologna,
Italy; Max-Planck-Institut fuer Extraterrestrische Physik, Garching bei
Muenchen, Federal Rep... |
astro-ph/9506140 | The Optical Variability of QSO's | The long-term variability of a sample of 486 optically selected QSOs in the
fields of the SA94, SA57 and SGP has been studied. The relations of variability
with luminosity and redshift have been investigated by means of statistical
estimators that are ``robust'' and allow at the same time to eliminate the
influence of ... | 1995-06-30 | 2007-05-23 | [
"astro-ph"
] | S. Cristiani, S. Trentini, F. La Franca, I. Aretxaga, P. Andreani, R.
Vio, A. Gemmo |
astro-ph/9506144 | Action Principle Solutions For Galaxy Motions Within 3000 Km/s | The numerical action variational principle is used to find fully nonlinear
solutions for the orbits of the mass tracers given their present redshifts and
angular positions and the cosmological boundary condition that the peculiar
velocities are small at high redshift. A solution predicts the distances of the
mass trace... | 1995-06-30 | 2009-10-28 | [
"astro-ph"
] | Edward J. Shaya, P.J.E. Peebles, & R. Brent Tully |
astro-ph/9506141 | Spatial and Luminosity Properties of the Perseus-Pisces Redshift Survey | We analyze the spatial and the luminosity properties of the Perseus-Pisces
redshift survey. We find that the two point correlation function (CF)
$\Gamma(r)$ is a power law up to the sample effective depth ($\sim 30
h^{-1}Mpc$), showing the fractal nature of the galaxy distribution in this
catalog. The fractal dimension... | 1995-06-30 | 2017-04-26 | [
"astro-ph"
] | F. Sylos Labini, M. Montuori and L. Pietronero |
astro-ph/9506143 | Statistics of N-Body Simulations. III. Unequal Masses | We describe results from large numbers of $N$-body simulations containing
from $250$ to $1000$ stars each. The distribution of stellar masses is a power
law, and the systems are isolated. While the collapse of the core exhibits the
expected segregation of different masses, we find that the post-collapse
evolution is, a... | 1995-06-30 | 2015-06-24 | [
"astro-ph"
] | Mirek Giersz and Douglas C. Heggie |
astro-ph/9506138 | Galactic jet sources and the AGN connection | In order to further test our hypothesis that jets and disk around compact
accreting objects are symbiotic features we investigate the newly discovered
superluminal galactic radio jets GRS 1915+105 and GRO J1655-40 and the two
famous galactic radio jets 1E1740-2942 and SS 433 within the framework of our
couple jet/disk ... | 1995-06-29 | 2007-05-23 | [
"astro-ph"
] | Heino Falcke and Peter L. Biermann |
astro-ph/9506139 | Multiwavelength Energy Distributions and Bolometric Luminosities of the
12--Micron Galaxy Sample | Aperture photometry from our own observations and the literature is presented
for the 12\um\ Galaxies in the near infrared J, H and K bands and, in some
cases, in the L band. These data are corrected to ``total'' near--infrared
magnitudes, (with a typical uncertainty of 0.3 magnitudes) for a direct
comparison with our ... | 1995-06-29 | 2009-10-28 | [
"astro-ph"
] | Luigi Spinoglio (IFSI), Matthew A. Malkan & Brian Rush (UCLA), and
Luis Carrasco & Else Recillas-Cruz (UNAM) |
astro-ph/9506133 | Formation, Propagation, and Decay of Coherent Pulses of Solar Cosmic
Rays | We have performed numerical simulations of the interplanetary transport of
solar cosmic rays. The particles form a coherent pulse within $\sim0.01$ AU
after their injection. The gradual decrease of a pulse's speed and anisotropy
can be understood in terms of an equilibrium between pitch-angle scattering and
focusing. T... | 1995-06-28 | 2015-06-24 | [
"astro-ph"
] | D. Ruffolo and T. Khumlumlert (Chulalongkorn U., Bangkok) |
astro-ph/9506136 | The Infrared Diameter -- Velocity Dispersion Relation for Elliptical
Galaxies | Using single channel infrared photometry from the literature, a provisional
K-band diameter--velocity dispersion relation for elliptical galaxies in the
Coma and Virgo clusters is derived. The Coma cluster relation has \~1.5 times
lower scatter at K than in B or V. Excluding 4 outliers, the RMS scatter at K
for 24 gala... | 1995-06-28 | 2009-10-28 | [
"astro-ph"
] | Michael D. Gregg (IGPP/LLNL) |
astro-ph/9506134 | Three-point correlation function of galaxy clusters in cosmological
models: a strong dependence on triangle shape | In this paper, we use large $\pppm$ N-body simulations to study the
three-point correlation function $\zeta$ of clusters in two theoretical models.
The first model (LCDM) is a low-density flat model of $\Omega_0=0.3$,
$\Lambda_0=0.7$ and $h=0.75$, and the second model (PIM) is an
Einstein-de-Sitter model with its linea... | 1995-06-28 | 2015-06-24 | [
"astro-ph"
] | Y.P. Jing (MPA), G. Boerner (MPA), R. Valdarnini (SISSA) |
astro-ph/9506137 | On The Jets Associated with Galactic Superluminal Sources | Recent observations of GRS 1915+105 and GRO J1655+40 reveal superluminal
motions in Galactic sources. This letter examines the physical conditions
within these Galactic sources, their interaction with their environment, their
possible formation, and contrasts them with their extragalactic counterparts.
In particular, e... | 1995-06-28 | 2009-10-28 | [
"astro-ph"
] | Amir Levinson and Roger Blandford |
astro-ph/9506132 | Primordial Magnetic Fields in False Vacuum Inflation | We show that, during false vacuum inflation, a primordial magnetic field can
be created, sufficiently strong to seed the galactic dynamo and generate the
observed galactic magnetic fields. Considering the inflaton dominated regime,
our field is produced by the Higgs-field gradients, resulting from a grand
unified phase... | 1995-06-28 | 2010-11-30 | [
"astro-ph",
"hep-ph"
] | A. C. Davis and K. Dimopoulos |
astro-ph/9506135 | The Nature of Plerions Surrounding Soft Gamma-Ray Repeaters | Compact steady sources of X-ray emission have been detected at the positions
of at least two soft gamma-ray repeaters (SGRs). These sources have been
interpreted as synchrotron nebulae powered by the neutron star that is causing
the bursts. We explore a plerion model for the sources surrounding SGRs where
the steady ob... | 1995-06-28 | 2009-10-28 | [
"astro-ph"
] | Alice K. Harding (NASA GSFC) |
astro-ph/9506148 | The Effects of Starbursts and Low-Surface-Brightness Galaxies on Faint
Galaxy Models | We present models predicting the magnitude, redshift, and color distributions
of field galaxies. We explore whether a fading starburst scenario can account
for the observations of faint blue galaxies. We marginally rule out a starburst
scenario with a local IMF because the models predict too many nearby faint
galaxies ... | 1995-06-28 | 2009-10-28 | [
"astro-ph"
] | B. A. McLeod and M. J. Rieke |
astro-ph/9506129 | QSO's from Galaxy Collisions with Naked Black Holes | In the now well established conventional view (see Rees [1] and references
therein), quasi-stellar objects (QSOs) and related active galactic nuclei (AGN)
phenomena are explained as the result of accretion of plasma onto giant black
holes which are postulated to form via gravitational collapse of the high
density regio... | 1995-06-27 | 2009-10-28 | [
"astro-ph"
] | M. Fukugita and E. L. Turner |
astro-ph/9506128 | ROSAT observations of radio-selected BL Lac objects | ROSAT observations of a homogeneous sample of radio--selected BL Lac objects
are presented. Results of a detailed spectral analysis in the soft 0.1-2.0 keV
energy range are discussed and compared with similar previously published
results. The X--ray spectral shape is discussed in relation to the overall
energy distribu... | 1995-06-27 | 2015-06-24 | [
"astro-ph"
] | Andrea Comastri, Silvano Molendi and Gabriele Ghisellini |
astro-ph/9506127 | Ising Model formulation of Large Scale Dynamics: Universality in the
Universe | The partition function of a system of galaxies in gravitational interaction
can be cast in an Ising Model form, and this reformulated via a
Hubbard--Stratonovich transformation into a three dimensional stochastic and
classical scalar field theory, whose critical exponents are calculable and
known. This allows one to {\... | 1995-06-27 | 2007-05-23 | [
"astro-ph",
"gr-qc"
] | J. Perez--Mercader, T. Goldman, D. Hochberg and R. Laflamme |
astro-ph/9506130 | Photon Splitting in Magnetar Models of Soft Gamma Repeaters | The recent association of soft gamma repeaters (SGRs) with counterparts in
other wavebands has sparked much interest in these sources. One of the recent
models for these objects is that they originate in the environs of neutron
stars with fields much stronger than the quantum critical field
\teq{B_{cr}=4.413\times 10^{... | 1995-06-27 | 2009-10-28 | [
"astro-ph"
] | M. G. Baring and A. K. Harding |
astro-ph/9506131 | Big Bang Nucleosynthesis: An Update | WThe current status of big bang nucleosynthesis is reviewed with an emphasis
on the comparison between the observational determination of the light element
abundances of \D, \he3, \he4 and \li7 and the predictions from theory. In
particular, we present new analyses for \he4 and \li7. Implications for physics
beyond the... | 1995-06-27 | 2009-09-15 | [
"astro-ph",
"hep-ph"
] | Keith A. Olive and Sean T. Scully |
astro-ph/9506122 | The purpose of astronomy | This is a presentation of the purpose of astronomy in the context of modern
society. After exposing two misconceptions about astronomy, I detail its role
in five domains, certified knowledge, incorporated abilities, innovations,
collective goods, and popular science; with each domain is associated an
institution, an in... | 1995-06-26 | 2009-10-28 | [
"astro-ph"
] | Emmanuel Davoust (OMP, Toulouse, France) |
astro-ph/9506123 | Visual Search for Galaxies near the Northern Crossing of the
Supergalactic plane by the Milky Way | We have visually examined twelve Palomar red Plates for galaxies at low
Galactic latitude b, where the Supergalactic Plane (SGP) is crossed by the
Galactic Plane (GP), at Galactic longitude l ~135 degrees. The catalogue
consists of 2575 galaxy candidates, of which 462 have major axis diameters d >=
0.8 arc min (uncorre... | 1995-06-26 | 2015-06-24 | [
"astro-ph"
] | G. K. T. Hau, H. C. Ferguson, O. Lahav, D. Lynden-Bell |
astro-ph/9506125 | The Physical State of the Intergalactic Medium or Can We Measure Y? | We present an argument for a {\it lower limit} to the Compton-$y$ parameter
describing spectral distortions of the cosmic microwave background (CMB). The
absence of a detectable Gunn-Peterson signal in the spectra of high redshift
quasars demands a high ionization state of the intergalactic medium (IGM).
Given an ioniz... | 1995-06-26 | 2015-06-24 | [
"astro-ph"
] | J.G. Bartlett, D. Barbosa, A. Blanchard (Observatoire de Strasbourg) |
astro-ph/9506121 | Software for producing trichromatic images in astronomy | We present a software package for combining three monochromatic images of an
astronomical object into a trichromatic color image. We first discuss the
meaning of "true" colors in astronomical images. We then describe the different
steps of our method, choosing the relevant dynamic intensity range in each
filter, invent... | 1995-06-26 | 2009-10-28 | [
"astro-ph"
] | Sebastien Morel, Emmanuel Davoust (OMP, Toulouse, France) |
astro-ph/9506124 | The HST Quasar Absorption Line Key Project VII. Absorption Systems at
$z_{\rm abs} \leq 1.3$ | We present evidence that clumps of \lya lines are physically associated with
about half of the extensive metal-line systems (absorption systems with four or
more observed metal-line species) found in this paper, demonstrate that all
four \lylimit systems discussed here correspond to extensive metal-line
absorption syst... | 1995-06-26 | 2009-10-28 | [
"astro-ph"
] | John N. Bahcall, Jacqueline Bergeron, Alec Boksenberg, George F.
hartig, Buell T. Jannuzi, Sofia Kirhakos, W. L. W. Sargent, Blair D. Savage,
Donald P.Schneider, David A. Turnshek, Ray J. Weymann, and Arthur M. Wolfe |
astro-ph/9506126 | ASCA observations of high redshift quasars | ASCA observations of 4 high redshift radio--loud quasars with 1.44$<$z$<$3.21
are presented. The spectral analysis for three of them (PKS 0332-403, PKS
0537-286, PKS 2149-306) reveals that their X-ray continuum emission is well
represented by a simple power--law model plus absorption with photon indices of
$\Gamma =1.9... | 1995-06-26 | 2007-05-23 | [
"astro-ph"
] | J.Siebert, M.Matsuoka, W.Brinkmann, M.Cappi, T.Mihara, T.Takahashi |
astro-ph/9506120 | Measuring Hubble's Constant in our Inhomogeneous Universe | Recent observations of Cepheids in the Virgo cluster have bolstered the
evidence that supports a Hubble constant in 70-90 km/s/Mpc range. This
evidence, by and large, probes the expansion of the Universe within 100 Mpc. We
investigate the possibility that the expansion rate within this region is
systematically higher t... | 1995-06-25 | 2015-06-24 | [
"astro-ph"
] | Xiangdong Shi, Lawrence M. Widrow, L. Jonathan Dursi (Queen's
University, Kinsgton, Ontario) |
astro-ph/9506119 | Propagation of Ultra High Energy Protons over Cosmological Distances and
Implications for Topological Defect Models | We describe the results of a hybrid matrix--Monte Carlo calculation of
cascading of UHE cosmic rays and $\gamma$-rays through the cosmic background
radiation fields over cosmological distances. We calculate the $\gamma$-ray and
neutrino emission that results from the cascade, as well as the effect of
cascading on the p... | 1995-06-23 | 2009-10-28 | [
"astro-ph"
] | R. J. Protheroe and P. A. Johnson |
astro-ph/9506118 | A Break in the Highest Energy Cosmic Ray Spectrum: A Signature of New
Physics? | Recent experimental data from the Fly's Eye and the Akeno array seem to
indicate significant structure in the ultrahigh energy cosmic ray spectrum
above $10^{18}\eV$. A statistically significant dip has been established at
about $5\times10^{18}\eV$. In addition, each experiment observed a different
superhigh energy eve... | 1995-06-23 | 2009-10-28 | [
"astro-ph"
] | G.Sigl, S.Lee, D.N.Schramm, and P.Bhattacharjee |
astro-ph/9506116 | The Globular Clusters in M87: A Bimodal Colour Distribution | We present $V$ and $I$ photometry for $\sim 150$ globular clusters with $20 <
V < 27$ $\sim 2.5$ arcmin from the centre of M87, the cD galaxy in the Virgo
cluster. The data were acquired with the Hubble Space Telescope which, with
effective resolution 0.1 arcsec, allows us for the first time to distinguish
between glob... | 1995-06-22 | 2015-06-24 | [
"astro-ph"
] | Rebecca A.W. Elson and Basilio X. Santiago |
astro-ph/9506115 | VLBI Observations of a Complete Sample of Radio Galaxies. VI. The Two
FR-I Radio Galaxies B2 0836+29 and 3C465 | We present 5 GHz global VLBI observations of the two Fanaroff Riley Type I
radio galaxies B2 0836+29 and 3C465 (2335+26). For 3C465 we present also 1.7
GHz and 8.4 GHz global VLBI data. In addition VLA observations were used to
obtain arsecond resolution continuum and polarization maps at 5 GHz. Both
sources are very a... | 1995-06-22 | 2015-06-24 | [
"astro-ph"
] | T. Vneturi, C. Castaldini, W.D. Cotton, L. Feretti, G. Giovannini, L.
Lara, J.M. Marcaide, A.E. Wehrle |
astro-ph/9506114 | First Observation of Parallax in a Gravitational Microlensing Event | We present the first detection of parallax effects in a gravitational
microlensing event. Parallax in a gravitational microlensing event observed
only from the Earth appears as a distortion of the lightcurve due to the motion
of the Earth around the Sun. This distortion can be detected if the event
duration is not much... | 1995-06-22 | 2009-10-28 | [
"astro-ph"
] | C. Alcock, R.A. Allsman, D. Alves, T.S. Axelrod, D.P. Bennett, K.H.
Cook, K.C. Freeman, K. Griest, J. Guern, M.J. Lehner, S.L. Marshall, B.A.
Peterson, M.R. Pratt, P.J. Quinn, A.W. Rodgers, C.W. Stubbs, and W.
Sutherland (The MACHO Collaboration) |
astro-ph/9506117 | Discovery of a faint optical jet in 3C 120 | We report the detection of an optical jet in the nearby Seyfert 1 radio
galaxy 3C 120. The optical jet coincides with the well-known radio jet and
emits continuum radiation (B,V',I) with a radio-to-optical spectral index of
0.65. There are no clear optical counterparts to the radio knots, although the
optical condensat... | 1995-06-22 | 2008-02-03 | [
"astro-ph"
] | J. Hjorth, M. Vestergaard, A. N. Sorensen, F. Grundahl |
astro-ph/9506113 | The MACHO Project First Year LMC Results: The Microlensing Rate and the
Nature of the Galactic Dark Halo | The MACHO collaboration reports on the analysis of our first year LMC data,
9.5 million light curves with an average of 235 observations each. Automated
selection procedures give 3 events consistent with microlensing. We evaluate
our experimental detection efficiency using a range of Monte- Carlo
simulations. Using a `... | 1995-06-21 | 2009-10-28 | [
"astro-ph",
"hep-ph"
] | C.Alcock, R.A.Allsman, T.S.Axelrod, D.P.Bennett, K.H.Cook,
K.C.Freeman, K.Griest, J.A.Guern, M.J.Lehner, S.L.Marshall, H.-S.Park,
S.Perlmutter, B.A.Peterson, M.R.Pratt, P.J.Quinn, A.W.Rodgers, C.W.Stubbs,
W.Sutherland (The MACHO Collaboration) |
astro-ph/9506112 | Pair annihilation radiation from relativistic jets in gamma-ray blazars | The contribution of the pair annihilation process in relativistic
electron-positron jets to the gamma-ray emission of blazars is calculated.
Under the same assumptions as for the calculation of the yield of inverse
Compton scattered accretion disk radiation (Dermer and Schlickeiser 1993) we
calculate the emerging pair ... | 1995-06-21 | 2011-05-23 | [
"astro-ph"
] | M. Boettcher, R. Schlickeiser (MPI f. Radioastronomie, Bonn) |
astro-ph/9506109 | Self-Consistent Evolution of Ring Galaxies | Ring galaxies are commonly known as objects where a burst of star formation
was triggered by a close encounter with an intruder, maybe a satellite galaxy.
BVRI CCD observations of five ring galaxies have been performed. Here we
present the results of a self-consistent approach to reproduce their observed
morphology and... | 1995-06-21 | 2009-10-28 | [
"astro-ph"
] | Paola Mazzei, Anna, Curir, Carlotta Bonoli |
astro-ph/9506111 | Spectropolarimetry of the nova-like variable V1315 Aql | We present spectropolarimetric observations of the eclipsing nova-like
variable V1315 Aql, obtained with the aim of determining whether the
single-peaked uneclipsed lines observed in this and related nova-likes are the
result of disc emission scattered into the line of sight by the wind. The data
show linear polarizati... | 1995-06-21 | 2015-06-24 | [
"astro-ph"
] | V.S. Dhillon, R.G.M. Rutten |
astro-ph/9506103 | The Metallicity Dependence of the CO-to-H$_2$ Conversion Factor from
Observations of Local Group Galaxies | High-resolution CO maps of 9 molecular clouds in IC 10 are combined with the
new measurement of the distance to this nearby metal poor galaxy to measure
accurately the CO-to-H2 conversion factor. The result for IC 10 is combined
with published data for four other Local Group galaxies (M31, M33, NGC 6822,
the SMC) to tr... | 1995-06-20 | 2010-04-06 | [
"astro-ph"
] | C. D. Wilson |
astro-ph/9506104 | The Star Formation Histories and Efficiencies of Two Giant HII Regions
in M33 | $UBV$ photometry is used to re-identify the OB associations which power the
two most luminous HII regions in M33, NGC 604 and NGC 595. There is a
significant difference (2-3 Myr) in the ages of the most recent star formation
episode in these two regions, while NGC 595 also has undergone a prior episode
of star formatio... | 1995-06-20 | 2009-10-28 | [
"astro-ph"
] | C. D. Wilson and B. C. Matthews |
astro-ph/9506110 | The Cluster Distribution as a Test for Dark Matter Models. II: The
Dipole Structure | We study the dipole for a redshift sample of Abell/ACO clusters. To elucidate
the constraints it places on dark matter models, we use numerical simulations
based on the Zel'dovich approximation. We run 20 realizations of each of six
different dark matter models: four of these have a density parameter
$\Omega_0=1$, whil... | 1995-06-20 | 2015-06-24 | [
"astro-ph"
] | P. Tini Brunozzi, S. Borgani, M. Plionis, L. Moscardini, P. Coles |
astro-ph/9506101 | Object DUO 2: A New Binary Lens Candidate | We present the light curve of an unusual variable object, DUO 2, detected
during the search for microlensing events by the DUO project. The star remained
stable for more than 150 days before it brightened by more than two magnitudes
in 6 days in the B and R bands. The light curves are achromatic during the
variability.... | 1995-06-20 | 2007-05-23 | [
"astro-ph"
] | C. Alard, S. Mao, J. Guibert |
astro-ph/9506107 | Are Galaxies Optically Thin to Their Own Lyman Continuum Radiation? II.
NGC 6822 | Halpha and UBV photometry of NGC 6822 are used to study the distribution of
OB stars and HII regions in the galaxy and to determine whether individual
regions of the galaxy are in a state of ionization balance. Four distinct
components of the Halpha emission (bright, halo, diffuse and field)
differentiated by their sur... | 1995-06-20 | 2009-10-28 | [
"astro-ph"
] | K. Patel and C. D. Wilson |
astro-ph/9506106 | Are Galaxies Optically Thin to Their Own Lyman Continuum Radiation? I.
M33 | Halpha and UBV photometry of the inner kpc of M33 are used to study the
distribution of OB stars and HII regions in the galaxy and to determine whether
individual regions of the galaxy are in a state of ionization balance. Based on
the surface brightness of the Halpha emission, we identify three distinct
ionized gas en... | 1995-06-20 | 2009-10-28 | [
"astro-ph"
] | K. Patel and C. D. Wilson |
astro-ph/9506100 | The Significance of the Cosmic Virial Theorem | We discuss the development and physics of the cosmic virial theorem and its
traditional application as an indicator of the cosmic mean density. The
standard result that the density must be sub-critical relies on the assumption
that the galaxy three-point correlation function accurately describes the mass
distribution a... | 1995-06-20 | 2011-05-23 | [
"astro-ph"
] | James G. Bartlett and Alain Blanchard (Observatoire de Strasbourg) |
astro-ph/9506108 | The extinction by dust in the outer parts of spiral galaxies | To investigate the distribution of dust in Sb and Sc galaxies we have
analyzed near-infrared and optical surface photometry for an unbiased sample of
37 galaxies. Since light in the $K$-band is very little affected by extinction
by dust, the $B-K$ colour is a good indicator of the amount of extinction, and
using the co... | 1995-06-20 | 2007-05-23 | [
"astro-ph"
] | R.F. Peletier, E.A. Valentijn, A.F.M. Moorwood, W. Freudling, J.H.
Knapen and J.E. Beckman |
astro-ph/9506102 | Gravitational Lensing and Anisotropies of CBR on the Small Angular
Scales | We investigate the effect of gravitational lensing, produced by linear
density perturbations, for anisotropies of the Cosmic Background Radiation
(CBR) on scales of arcminutes. In calculations, a flat universe ($\Omega=1$)
and the Harrison-Zel'dovich spectrum ($n=1$) are assumed. The numerical results
show that on scal... | 1995-06-20 | 2015-06-24 | [
"astro-ph"
] | J.M. Liu, J.G. Gao |
astro-ph/9506105 | HST Star Counts at High Galactic Latitudes | We use star counts from 13 deep HST fields imaged with the {\it Wide Field
Camera - 2} in order to constrain the amount of dark matter in the Galaxy that
can be in the form of low-mass main sequence stars or white-dwarfs. Based on
the number of red stars found in our fields, we exclude the possibility that
more than 25... | 1995-06-20 | 2015-06-24 | [
"astro-ph"
] | Basilio X. Santiago, Gerard Gilmore, Rebecca A. W. Elson |
astro-ph/9506099 | Gamma-ray bursters as sources of cosmic rays | The little we do know of the physical conditions in gamma-ray bursters makes
them conducive to the acceleration of high-energy cosmic rays, especially if
they are at cosmological distances. We find that, with the observed statistics
and fluxes of gamma-ray bursts, cosmological bursters may be an important
source of cos... | 1995-06-20 | 2008-11-26 | [
"astro-ph",
"hep-ph"
] | Mordehai Milgrom and Vladimir Usov (Weizmann Institute) |
astro-ph/9506098 | The Central Region in M100: Observations and Modeling | We present new high-resolution observations of the center of the late-type
spiral M100 (NGC 4321) supplemented by 3D numerical modeling of stellar and gas
dynamics, including star formation (SF). NIR imaging has revealed a stellar
bar, previously inferred from optical and 21 cm observations, and an
ovally-shaped ring-l... | 1995-06-19 | 2010-04-21 | [
"astro-ph"
] | J.H. Knapen, J.E. Beckman, C.H. Heller, I. Shlosman & R.S. de Jong |
astro-ph/9506097 | The OPAL Equation of State and Low Metallicity Isochrones | The Yale stellar evolution code has been modified to use the OPAL equation of
state tables (Rogers 1994). Stellar models and isochrones were constructed for
low metallicity systems ($-2.8 \le [Fe/H] \le -0.6$). Above $M\sim 0.7\,\msun$,
the isochrones are very similar to those which are constructed using an
equation of... | 1995-06-19 | 2009-10-28 | [
"astro-ph"
] | Brian Chaboyer and Yong --Cheol Kim |
astro-ph/9506095 | Deep optical galaxy counts with the Keck Telescope | We present faint galaxy counts from deep $VRI$ images obtained with the Keck
Telescope. These images reach $R\sim27$ in median seeing FWHM $\sim 0.5$--0.6
arcsec and we detect a integrated galaxy number density of $7\times 10^{5}$
degree$^{-2}$, equivalent to $3\times 10^{10}$ galaxies in the observable
Universe. In ad... | 1995-06-17 | 2009-10-28 | [
"astro-ph"
] | Ian Smail (OCIW), David W. Hogg (Caltech), Lin Yan (Caltech), and Judy
Cohen (Caltech) |
astro-ph/9506096 | X-Ray Spectra of Z Sources | A simple, physically consistent model has been proposed that seeks to explain
in a unified way the X-ray spectra and rapid X-ray variability of the so-called
Z sources and other accreting neutron stars in low-mass systems. Here we
summarize the results of detailed numerical calculations of the X-ray spectra
of the Z so... | 1995-06-17 | 2009-10-28 | [
"astro-ph"
] | Dimitrios Psaltis (University of Illinois), Frederick K. Lamb
(University of Illinois), and Guy S. Miller (Northwestern University) |
astro-ph/9506090 | ABELL 2163: Temperature, Mass, and Hydrostatic Equilibrium | Using ASCA data, we have measured the electron temperature in A2163 out to
1.5h^{-1} Mpc (10a_x) from the center, in three radial bins. The temperatures
are 12.2+1.9-1.2 keV, 11.5+2.7-2.9 keV and 3.8+1.1-0.9 keV (90%) in the 0-3 a_x
(0-3.5'), 3-6 a_x and 6-13 a_x spherical shells, respectively. Applying the
hydrostatic... | 1995-06-16 | 2009-10-28 | [
"astro-ph"
] | M.Markevitch, R.Mushotzky, H.Inoue, K.Yamashita, A.Furuzawa, Y.Tawara |
astro-ph/9506091 | Open Cold Dark Matter Models | Motivated by recent developments in inflationary cosmology indicating the
possibility of obtaining genuinely open universes in some models, we compare
the predictions of cold dark matter (CDM) models in open universes with a
variety of observational information. The spectrum of the primordial curvature
perturbation is ... | 1995-06-16 | 2015-06-24 | [
"astro-ph"
] | Andrew R Liddle, David H Lyth, David Roberts and Pedro P T Viana |
astro-ph/9506094 | Big-Bang Nucleosynthesis and Galactic Chemical Evolution | Deuterium is the best indicator of the baryon density; however, only its
present abundance is known (and only locally) and its chemical evolution is
intertwined with that of $^3$He. Because galactic abundances are spatially
heterogeneous, mean chemical-evolution models are not well suited for
extrapolating the pre-sola... | 1995-06-16 | 2009-10-28 | [
"astro-ph"
] | Craig J. Copi, David N. Schramm, and Michael S. Turner |
astro-ph/9506092 | Blending of Light in Gravitational Microlensing Events | When there is more than one source of light along the line of sight to a
gravitationally lensed object, the characteristics of the observed light curve
are influenced by the presence of the light that is not lensed. In this paper
we develop a formalism to quantify the associated effects. We find it useful to
introduce ... | 1995-06-16 | 2009-10-28 | [
"astro-ph"
] | R. DiStefano, A. A. Esin |
astro-ph/9506093 | The environments of z<0.3 QSOs | We have carried out an investigation of the galaxy environments of low
redshift ($z<0.3$) QSOs by cross-correlating the positions on the sky of
X-ray-selected QSOs/AGN identified in the {\it Einstein} Medium Sensitivity
Survey (EMSS) with those of $B_J<20.5$ galaxies in the APM galaxy catalogues.
At $<5\,$arcmin, we fi... | 1995-06-16 | 2015-06-24 | [
"astro-ph"
] | R.J. Smith, B.J. Boyle, S.J. Maddox |
astro-ph/9506086 | ASCA PV observations of the Seyfert 1 galaxy MCG-6-30-15 : rapid
variability of the warm absorber | We present a detailed re-analysis of the two {\it ASCA} Performance
Verification observations of the nearby Seyfert 1 galaxy MCG-6-30-15.
Confirming the results of Fabian et al. (1994), we find definite evidence for
the {\sc O\,vii} and {\sc O\,viii} K-shell absorption edges of the warm
absorber and a doubling of the w... | 1995-06-14 | 2015-06-24 | [
"astro-ph"
] | C.S. Reynolds, A.C. Fabian, K. Nandra, H. Inoue, H. Kunieda, K.
Iwasawa |
astro-ph/9506084 | Inversions in astronomy and the SOLA method | This paper was presented at the Institute for Mathematics and its
Applications workshop "Inverse problems in wave propagation" and will appear in
the series IMA volumes (Springer). A brief overview of applications of
inversions within astronomy is presented and also an inventory of techniques
commonly in use. Most of t... | 1995-06-14 | 2007-05-23 | [
"astro-ph"
] | F.P. Pijpers |
astro-ph/9506089 | Spectroscopic Evidence That the Extreme Properties of IRAS F10214+4724
are due to Gravitational Lensing | The extreme bolometric luminosity of IRAS F10214+4724, and in particular the
huge mass in molecular gas inferred from the CO line fluxes have led to
suggestions that this is a giant galaxy in the process of formation. An
arc-like structure and the closeness of a second object suggest, however, that
gravitational lensin... | 1995-06-14 | 2016-06-08 | [
"astro-ph"
] | Stephen Serjeant, Mark Lacy, Steve Rawlings, Lindsay King, D.L.
Clements |
astro-ph/9506087 | Discovery of an ultrasoft transient ROSAT AGN: WPVS007 | We have identified the ROSAT source RX J0039.2-5117 with the previously
almost unknown `narrow line' Seyfert 1 galaxy WPVS007 (z=0.028). The X-ray
source displays quite unusual properties for an AGN. It was bright and
ultrasoft in the ROSAT All-Sky Survey (RASS) and found at a level lower by a
factor of ~ 400 in PSPC c... | 1995-06-14 | 2007-05-23 | [
"astro-ph"
] | D. Grupe, K. Beuermann, K. Mannheim, H.-C. Thomas, D. deMartino, and
H.H. Fink |
astro-ph/9506088 | COBE-DMR-normalisation for inflationary flat dark matter models | The two-year COBE-DMR 53 and 90 GHz sky maps, in both galactic and ecliptic
coordinates, are used to determine the normalisation of inflationary universe
models with a flat global geometry and adiabatic density perturbations. The
appropriately normalised cold and mixed dark matter models and cosmological
constant domin... | 1995-06-14 | 2015-06-24 | [
"astro-ph"
] | R. Stompor, K.M. Gorski and A.J. Banday |
astro-ph/9506085 | Optical appearance of the gravitational lens system B0218+35.7 | We present high-resolution CCD images (FWHM=0.6"-0.7") of the compact
gravitational lens system B0218+35.7 obtained at the Nordic Optical Telescope.
Using aperture and PSF photometry we detect the two closely separated (335 mas)
components A and B as well as the lensing galaxy. In the optical B seems to be
very much br... | 1995-06-13 | 2016-06-08 | [
"astro-ph"
] | F. Grundahl, J. Hjorth |
astro-ph/9506083 | Mergers and Galaxy Evolution (Sept94 Ringberg Workshop) | Galaxy merging is the late time manifestation of the galaxy formation process
and likely significantly effects $z<1$ galaxies. A ``maximum reasonable rate''
model for merging finds a $\sim2$ mag K band increase in the luminosities of
dwarf galaxies so that they contribute significantly to the faint counts, with
spirals... | 1995-06-13 | 2016-08-30 | [
"astro-ph"
] | R. G. Carlberg |
astro-ph/9506080 | The Optical Content of the Error Box of GRS 1915+105 | We report on deep photometry and spectroscopy of the objects detected in the
ROSAT HRI X-ray error box of the hard X-ray transient, GRS 1915+105. The
probable counterpart of this source has been detected, with a magnitude of 23.4
in the I band. The optical absorption ${\rm A}_{\rm V} = 28$ derived from the
X-ray data i... | 1995-06-13 | 2007-05-23 | [
"astro-ph"
] | Michel Boer, Jochen Greiner, and Christian Motch |
astro-ph/9506081 | On the acceleration of Ultra High Energy Cosmic Rays in Gamma Ray Bursts | UHECRs are roughly isotropic and attain very large energies, $E \gtrsim
3\times 10^{20} \; eV$. Conventional models fail to explain both facts. I show
here that acceleration of UHECRs in GRBs satisfies both observational
constraints. Using M\'esz\'aros and Rees' (1994) model of GRBs as due to
hyperrelativistic shocks, ... | 1995-06-13 | 2009-10-28 | [
"astro-ph"
] | Mario Vietri (Osservatorio Astronomico di Roma) |
astro-ph/9506082 | The Effect of Encounters on the Eccentricity of Binaries in Clusters | We derive analytical expressions for the change in the orbital eccentricity
of a binary following a distant encounter with a third star on a hyperbolic or
parabolic orbit. To establish the accuracy of these expressions, we present
detailed comparisons with the results of direct numerical integrations of the
equations o... | 1995-06-13 | 2015-06-24 | [
"astro-ph"
] | Douglas C. Heggie and Frederic A. Rasio |
astro-ph/9506079 | On the Global Stability of Magnetized Accretion Disks. II. Vertical and
Azimuthal Magnetic Fields | We investigate the global stability of a differentially rotating fluid shell
threaded by vertical and azimuthal magnetic fields to linear, axisymmetric
perturbations. This system, which models a thick accretion disk in the vicinity
of its midplane, is susceptible to the Velikhov-Chandrasekhar (VC) instability
in the ab... | 1995-06-13 | 2009-10-28 | [
"astro-ph"
] | Charles Curry and Ralph E. Pudritz |
astro-ph/9506075 | The small-scale clustering power spectrum and relativistic decays | We present constraints on decaying-particle models in which an enhanced
relativistic density allows an $\Omega=1$ Cold Dark Matter universe to be
reconciled with acceptable values for the Hubble constant. Such models may
contain extra small-scale power, which can have important consequences for
enhanced object formatio... | 1995-06-12 | 2015-06-24 | [
"astro-ph"
] | S.J. McNally and J.A. Peacock |
astro-ph/9506077 | The Canada-France Redshift Survey VII: Optical counterparts of
microJansky radiosources | Deep imaging and spectroscopy have been carried out for optical counterparts
of a complete sample of S$>$16 $\mu$Jy radiosources during the course of the
Canada-France Redshift Survey (CFRS). All 36 sources but two have been
optically identified, and spectra have been obtained for 23 of them. The
objects brighter than ... | 1995-06-12 | 2015-06-24 | [
"astro-ph"
] | F. Hammer, D. Crampton, O. Le Fevre, S. Lilly, T. Kenet |
astro-ph/9506073 | How much of the extreme luminosity of IRAS F10214+4724 can be attributed
to gravitational lensing | \noindent The galaxy IRAS F10214+4724, discovered in a spectroscopic survey
of a 0.2 Jy sample by Rowan-Robinson and collaborators in 1991, is
significantly more luminous than any other known galaxy. Its bolometric
luminosity is comparable to those of the most luminous quasars. Recent
obsservations have revealed a cand... | 1995-06-12 | 2015-06-24 | [
"astro-ph"
] | Neil Trentham |
astro-ph/9506078 | Cygnus A and Other 3CR Sources in Cosmological Tests | Powerful extended radio galaxies like Cygnus A can be used for cosmological
tests. The characteristic, time-independent length $D_*$ for several radio
sources is calculated and compared to the average physical length for a sample
of radio galaxies. The ratio of these two lengths as a function of redshift is
used to con... | 1995-06-12 | 2007-05-23 | [
"astro-ph"
] | Erick J. Guerra & Ruth A. Daly |
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