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/9504025 | Approximate input physics for stellar modelling | We present a simple and efficient, yet reasonably accurate, equation of
state, which at the moderately low temperatures and high densities found in the
interiors of stars less massive than the Sun is substantially more accurate
than its predecessor by Eggleton, Faulkner & Flannery. Along with the most
recently availabl... | 1995-04-07 | 2015-06-24 | [
"astro-ph"
] | O.R. Pols, C.A. Tout, P.P. Eggleton, Z. Han |
astro-ph/9504026 | The Nuclear Impact on Cosmology: The $H_0\hbox{-}\Omega$ Diagram | The \HOmega\ diagram is resurrected to dramatically illustrate the nature of
the key problems in physical cosmology today and the role that nuclear physics
plays in many of them. In particular it is noted that the constraints on
\OmegaB\ from big bang nucleosynthesis do not overlap with the constraints on
\OmegaVis\ no... | 1995-04-07 | 2014-10-13 | [
"astro-ph"
] | Craig J. Copi and David N. Schramm |
astro-ph/9504023 | An additional source of gas ionization in the extended narrow line
region of NGC1068 | The results of calculations of gas emission spectra with both central and
extended sources of ionization have been compared to the ratio of line
intensities observed in the extended narrow line region of NGC1068. The origin
of an extended structure of anomalous strength in the $[OIII] \lambda 5007$ and
$[NeV] \lambda 3... | 1995-04-07 | 2007-05-23 | [
"astro-ph"
] | L.S. Nazarova |
astro-ph/9504016 | RECONSTRUCTING POSITIONS AND PECULIAR VELOCITIES OF GALAXY CLUSTERS
WITHIN 20000 Km/sec | Starting from the observed redshift distribution of a volume limited
Abell/ACO cluster sample we use a 2-step procedure to recover their distances
and peculiar velocities (assuming linear theory and linear biasing). The
resulting 3D dipole is found to be 23\% less than the corresponding z-space one
which leads to a val... | 1995-04-06 | 2007-05-23 | [
"astro-ph"
] | E. BRANCHINI and M. PLIONIS |
astro-ph/9504018 | The Statistics of Microlensing Light Curves: I. Amplification
Probability Distributions | The passage of stars through the beam of a lensed quasar can induce violent
fluctuations in its apparent brightness. The fluctuations observed in the
Huchra lens, (2237+0305), are taken to be the first evidence of this
``microlensing'' occurring in lensing systems. Subsequent microlensing events
observed in this system... | 1995-04-06 | 2015-06-24 | [
"astro-ph"
] | G.F. Lewis, M.J. Irwin |
astro-ph/9504017 | The proximity Effect on the Lyman alpha Forest due to a Foreground QSO | We present the results of our study on three close pairs of QSOs. Our results
are consistent with the existence of a proximity effect due to the foreground
QSO, but due to its weakness we can only reject the absence of such effect at
approx. 1 sigma level. By modelling this proximity effect in terms of a simple
photoio... | 1995-04-06 | 2007-05-23 | [
"astro-ph"
] | A. Fernandez-Soto, X.Barcons, R. Carballo, J.K. Webb |
astro-ph/9504020 | GALAXY DYNAMICS IN CLUSTERS | We use high resolution simulations to study the formation and distribution of
galaxies within a cluster which forms hierarchically. We follow both dark
matter and baryonic gas which is subject to thermal pressure, shocks and
radiative cooling. Galaxy formation is identified with the dissipative collapse
of the gas into... | 1995-04-06 | 2009-09-25 | [
"astro-ph"
] | C.S. Frenk, A.E. Evrard, S.D.M. White & FJ Summers |
astro-ph/9504015 | Spectrum of the relic neutrino background from past supernovae and
cosmological models | It is greatly expected that the relic neutrino background from past
supernovae is detected by Superkamiokande (SK) which is now under construction.
We calculate the spectrum and the event rate at SK systematically by using the
results of simulations of a supernova explosion and reasonable supernova rates.
We also inves... | 1995-04-06 | 2010-11-01 | [
"astro-ph"
] | Tomonori Totani and Katsuhiko Sato (Tokyo Univ.) |
astro-ph/9504019 | Splitting of the Alfven surface in a relativistic pulsar wind | In a recent paper, Li and Melrose have claimed that the splitting - due to
relativistic effects - of the Alfven surface in an axisymmetric pulsar wind
does not occur. Here we refute this claim by showing that, unless the solution
that describes the flow along each open magnetic field line passes through the
pure Alfven... | 1995-04-06 | 2015-06-24 | [
"astro-ph"
] | H. Ardavan |
astro-ph/9504014 | A Warm-Plus-Hot Dark Matter Universe | We investigate a new hybrid-model universe containing two types of dark
matter, one ``warm'' and the other ``hot''. The hot component is an ordinary
light neutrino with mass $\sim 25h^2$~eV while the warm component is a sterile
neutrino with mass $\sim 700h^2$~eV. The two types of dark matter arise
entirely within the ... | 1995-04-05 | 2009-10-28 | [
"astro-ph",
"hep-ph"
] | R.A. Malaney, G.D. Starkman, L. Widrow |
astro-ph/9504011 | Interstellar matter in Shapley-Ames elliptical galaxies. IV. A diffusely
distributed component of dust and its effect on colour gradients | The presence of dust in elliptical galaxies has recently been shown to be
quite common. Deep optical multi-colour CCD imaging has revealed the presence
of dust lanes and patches, and the technique of co-adding IRAS survey scans has
led to many detections of elliptical galaxies. The optical and far-infrared
surveys repo... | 1995-04-05 | 2008-11-26 | [
"astro-ph"
] | Paul Goudfrooij (ESO Garching) and Teije de Jong (Laboratory for Space
Research, Groningen) |
astro-ph/9504012 | Stochastic aggregation model for the multifractal distribution of matter | Two main features of the observable distribution of visible matter are the
space correlations of galaxy positions and the mass function of galaxies. As
discussed in Pietronero and Sylos Labini on this issue ([1], see also [2],[3]),
the concept of multifractal (MF) distribution (including the masses) naturally
unifies t... | 1995-04-05 | 2016-08-30 | [
"astro-ph"
] | F. Sylos Labini and L. Pietronero |
astro-ph/9504004 | Stable and Unstable Accretion Flows with Angular Momentum near a Point
Mass | The properties of axisymmetric accretion flows of cold adiabatic gas with
zero total energy in the vicinity of a Newtonian point mass are characterized
by a single dimensionless parameter, the thickness of incoming flow. In the
limit of thin accretion flows with vanishing thickness, we show that the
governing equations... | 1995-04-05 | 2009-10-28 | [
"astro-ph"
] | Dongsu Ryu, Garry L. Brown, Jeremiah P. Ostriker, and Abraham Loeb |
astro-ph/9504013 | Cosmological Principle and the debate about Large Scale Structures
distribution | The basic hypothesis of a post-Copernican Cosmological theory is that {\em
all the points} of the Universe have to be essentially equivalent: this
hypothesis is required in order to avoid any privileged {\em observer}. This
assumption has been implemented by Einstein in the so-called Cosmological
Principles (CP): {\em ... | 1995-04-05 | 2009-10-28 | [
"astro-ph"
] | L.Pietronero and F. Sylos Labini |
astro-ph/9504005 | A Study of the Large--Scale Distribution of Galaxies in the South
Galactic Pole Region: I. The Data | We present the data from an extensive, moderately deep (b_J = 19.5)
spectroscopic survey of $\sim 600$ galaxies within four regions of sky located
near the South Galactic Pole. About 75% of the measured galaxies are in a 3deg
x 1.5deg region dominated by the rich cluster Klemola 44 (Abell 4038). The
other three smaller... | 1995-04-04 | 2015-06-24 | [
"astro-ph"
] | S. Ettori, L. Guzzo, M. Tarenghi |
astro-ph/9504010 | Do Gamma-Ray Burst Sources Repeat? | The demonstration of repeated gamma-ray bursts from an individual source
would severely constrain burst source models. Recent reports (Quashnock and
Lamb 1993; Wang and Lingenfelter 1993) of evidence for repetition in the first
BATSE burst catalog have generated renewed interest in this issue. Here, we
analyze the angu... | 1995-04-04 | 2009-10-28 | [
"astro-ph"
] | Charles A. Meegan (NASA/MSFC), Dieter H. Hartmann (Clemson), J. J.
Brainerd (UAH), Michael S. Briggs (UAH), William S. Paciesas (UAH), Geoffrey
Pendleton (UAH), Chryssa Kouveliotou (USRA), Gerald Fishman (NASA/MSFC),
George Blumenthal (UCSC), Martin Brock (NASA/MSFC) |
astro-ph/9504008 | The Distribution of Mass and Gas in the Center of Clusters of Galaxies
Implied by X-Ray and Lensing Observations | Observations of gravitational lensing indicate that the mass distribution in
clusters of galaxies (where most of the mass is dark matter) is highly peaked
towards the center, while X-ray observations imply that the gas is more
extended. The additional fact that the gas is cooling in the center has often
led one to expe... | 1995-04-04 | 2009-10-28 | [
"astro-ph"
] | Eli Waxman and Jordi Miralda-Escud\'e (Institute for Advanced Study) |
astro-ph/9504006 | Abundances in the Lyman--alpha clouds | We have re--examined the chemical composition of \lya clouds using the
composite--cloud technique, in which each \lya line in a spectrum is shifted to
its rest frame wavelength and all rest frame spectra are co--added to form an
`averaged' \lya cloud spectrum. We illustrate how various estimates of the
spectrum and red... | 1995-04-04 | 2007-05-23 | [
"astro-ph"
] | Sandra Savaglio & John Webb |
astro-ph/9504007 | EVOLUTION OF IR-SELECTED GALAXIES IN Z~0.4 CLUSTERS | Wide-field optical and near--IR ($JHK$) imaging is presented for two rich
galaxy clusters: Abell~370 at $z=0.374$ and Abell~851 (Cl0939+47) at $z=0.407$.
Galaxy catalogs selected from the near--IR images are 90\% complete to
approximately 1.5 mag below $K^\ast$ resulting in samples with $\sim$100
probable member galaxi... | 1995-04-04 | 2009-10-28 | [
"astro-ph"
] | S.A. Stanford, P.R.M. Eisenhardt, and Mark Dickinson |
astro-ph/9504009 | Active vase mirrors warped by Zernike polynomials for Correcting
off-axis aberrations of fixed primary mirrors. Part 2 - Optical testing and
performance evaluation | We investigate the aspherization of an active mirror for correcting third and
fifth-order aberrations. We use a stainless steel AISI 420 mirror with a
controlled pressure load, two series of 12-punctual radial positions of force
application distributed symmetrically in two concentric rings around the
mirror. We obtain ... | 1995-04-04 | 2019-08-15 | [
"astro-ph"
] | G. Moretto, G. R. LemaitreT. Bactivelane, M. Wang, M. Ferrari, S.
Mazzanti, B. Di Biagio and E.F. Borra |
astro-ph/9503125 | Cosmological Dynamics | This is a set of lecture notes basd on the lectures on cosmological dynamics
given by E. Bertschinger at Les Houches in August 1993. The contents include
elementary mechanics in cosmology, Eulerian and Lagrangian fluid dynamics, hot
dark matter, and relativistic cosmological perturbation theory. To typeset the
notes on... | 1995-04-03 | 2007-05-23 | [
"astro-ph"
] | Edmund Bertschinger |
astro-ph/9504001 | REMOVING DEGENERACY OF MICROLENSING LIGHT CURVES THROUGH NARROW-BAND
PHOTOMETRY OF GIANTS | The standard light curve of a microlensing event provides only two
constraints on the six unknown parameters of the lens. We show that narrow-band
photometry during a microlensing event of a giant star can in addition
determine the angular radius of the Einstein ring and the proper motion of the
lens. This possibility ... | 1995-04-03 | 2009-10-28 | [
"astro-ph"
] | Abraham Loeb and Dimitar Sasselov (Harvard Univ.) |
astro-ph/9503124 | A Study of the Stability Properties of SPH | When using a formulation of Smooth Particle Hydrodynamics (SPH) which
conserves momentum exactly the motion of the particles is observed to be
unstable to negative stress. It is also found that under normal circumstances a
lattice of SPH particles is potentially unstable to transverse waves. This
document is a summary ... | 1995-04-03 | 2007-05-23 | [
"astro-ph"
] | Joseph Peter Morris (Monash University, Melbourne) |
astro-ph/9504003 | The Cosmological Constant is Back | A diverse set of observations now compellingly suggest that Universe
possesses a nonzero cosmological constant. In the context of quantum-field
theory a cosmological constant corresponds to the energy density of the vacuum,
and the wanted value for the cosmological constant corresponds to a very tiny
vacuum energy dens... | 1995-04-03 | 2014-10-13 | [
"astro-ph",
"hep-ph"
] | Lawrence M. Krauss and Michael S. Turner |
astro-ph/9504002 | COOLING FLOW MODELS OF THE X--RAY EMISSION AND TEMPERATURE PROFILES FOR
A SAMPLE OF ELLIPTICAL GALAXIES | A simple spherically-symmetric, steady-state, cooling-flow description with
gas loss (following Sarazin \& Ashe 1989), within galaxy models constrained by
radially extended stellar dynamical data, is shown to provide generally
reasonable fits to the existing data on X-ray emission profiles and
temperatures for a set of... | 1995-04-03 | 2009-10-28 | [
"astro-ph"
] | Giuseppe Bertin and Thomas Toniazzo |
astro-ph/9503123 | Two X-ray Sources in 30 Doradus: Wolf-Rayet + Black Hole Binaries? | I report the detection of two X-ray sources of luminosities $\sim 10^{36}
{\rm~ergs~s^{-1}}$ in the central region of 30 Doradus. These two sources
appear point-like in images taken with the {\sl ROSAT} HRI. One of the sources
is most likely associated with a close spectroscopic binary R140a2 (WN6) with
an orbital peri... | 1995-04-02 | 2009-10-28 | [
"astro-ph"
] | Q. Daniel Wang (Northwestern University) |
astro-ph/9503122 | Numerical simulation of large-scale magnetic-field evolution in spiral
galaxies | The evolution of large-scale magnetic fields in disk galaxies is investigated
numerically. The gasdynamical simulations in a disk perturbed by spiral or bar
potential are incorporated into the kinematic calculations of induction
equations to elucidate the effects of non-axisymmetric disk structure on
magnetic fields. T... | 1995-04-02 | 2007-05-23 | [
"astro-ph"
] | K. Otmianowska-Mazur, M. Chiba |
astro-ph/9503119 | Measurement of the Mass Profile of Abell 1689 | In this letter we present calibrated mass and light profiles of the rich
cluster of galaxies Abell 1689 out to 1 $h^{-1}$ Mpc from the center. The high
surface density of faint blue galaxies at high redshift, selected by their low
surface brightness, are unique tools for mapping the projected mass
distribution of foreg... | 1995-04-01 | 2016-08-30 | [
"astro-ph"
] | J. A. Tyson and P. Fischer |
astro-ph/9503120 | 26Al and 60Fe From Supernova Explosions | Using recently calculated yields for Type II supernovae, along with models
for chemical evolution and the distribution of mass in the interstellar medium,
the current abundances and spatial distributions of two key gamma-ray
radioactivities, $^{26}$Al and $^{60}$Fe, are determined. The estimated steady
state production... | 1995-04-01 | 2009-10-28 | [
"astro-ph"
] | F.X.Timmes, S.E.Woosley, D.H.Hartmann, R.D.Hoffman, T.A.Weaver, and
F.Matteucci |
astro-ph/9503118 | OLD ISOLATED ACCRETING NEUTRON STARS: CONTRIBUTION TO THE SOFT X--RAY
BACKGROUND IN THE 0.5--2 KEV BAND | The issue of the observability of Old Isolated Neutron Stars (ONSs) accreting
from the interstellar gas, is reconsidered using the spectra presented in
Zampieri {\it et al.\/} (1995). In particular, we focus our attention on the
overall soft X--ray emission of ONSs, which may provide a substantial
contribution to the X... | 1995-03-31 | 2009-10-28 | [
"astro-ph"
] | Silvia Zane, Roberto Turolla, Luca Zampieri, Monica Colpi, Aldo Treves |
astro-ph/9503121 | A New Statistical Indicator to Study Nonlinear Gravitational Clustering
and Structure Formation | In an expanding universe, velocity field and gravitational force field are
proportional to each other in the linear regime. Neither of these quantities
evolve in time and these can be scaled suitably so that the constant of
proportionality is unity and velocity and force field are equal. The Zeldovich
approximation ext... | 1995-03-31 | 2009-10-28 | [
"astro-ph"
] | J.S.Bagla and T.Padmanabhan |
astro-ph/9503117 | A Multiwavelength Picture of the AFGL 5142 Star-forming Region | We present molecular line, H2O maser, radio continuum and near infrared maps
of the bipolar outflow source AFGL5142. The high resolution of our molecular CO
observations enables us to define the morphology of the large-scale bipolar
outflow into a two lobe structure extending for 2' on each side of the center.
In the p... | 1995-03-31 | 2007-05-23 | [
"astro-ph"
] | Todd R. Hunter (CIT), Leonardo Testi (Arcetri), Greg B. Taylor (CIT),
Marcello Felli (Arcetri), Gianni Tofani (Arcetri) and Thomas G. Phillips
(CIT) |
astro-ph/9503114 | What is the Small-Scale Velocity Dispersion of Galaxy Pairs? | We present some new results from an ongoing investigation of the anisotropy
of the two--point correlation function for optically selected galaxies. We have
estimated xi(r_p,pi) from the Perseus-Pisces redshift survey, which is now
virtually 100\% complete for all morphological types to m_B = 15.5. We detect
strong dist... | 1995-03-30 | 2007-05-23 | [
"astro-ph"
] | L. Guzzo, K.B. Fisher, M.S. Strauss, R. Giovanelli, M.P. Haynes |
astro-ph/9503116 | A faint galaxy redshift survey to B=24 | Using the multislit LDSS-2 spectrograph on the {\it William Herschel
Telescope} we have completed a redshift survey in the magnitude range $22.5<B<
24$ which has produced 73 redshifts representing a 73\% complete sample
uniformly-selected from four deep fields at high Galactic latitude. The survey
extends out to $z>1$ ... | 1995-03-30 | 2015-06-24 | [
"astro-ph"
] | K. Glazebrook, R. Ellis, M. Colless, T. Broadhurst, J.
Allington-Smith, N. Tanvir |
astro-ph/9503115 | Contribution to the Three--Point Function of the Cosmic Microwave
Background from the Rees--Sciama Effect | We compute the contribution to the three--point temperature correlation
function of the Cosmic Microwave Background coming from the non--linear
evolution of Gaussian initial perturbations, as described by the Rees--Sciama
(or integrated Sachs--Wolfe) effect. By expressing the collapsed three--point
function in terms of... | 1995-03-30 | 2011-05-10 | [
"astro-ph"
] | Silvia Mollerach, Alejandro Gangui, Francesco Lucchin, and Sabino
Matarrese |
astro-ph/9503111 | COSMOLOGY WITH CLUSTERS OF GALAXIES | Rich clusters of galaxies, the largest virialized systems known, provide a
powerful tool for the study of cosmology. Some of the fundamental questions
that can be addressed with clusters of galaxies include: how did galaxies and
large-scale structure form and evolve? What is the amount, composition and
distribution of ... | 1995-03-29 | 2007-05-23 | [
"astro-ph"
] | Neta A. Bahcall (Princeton University Observatory) |
astro-ph/9503109 | Evidence for Steep Luminosity Functions in Clusters of Galaxies | Luminosity Functions have been obtained for very faint dwarf galaxies in the
cores of four rich clusters of galaxies (Abell 2052, 2107, 2199 and 2666). It
is found that the luminosity function of dwarf galaxies rises very steeply in
these clusters, with a power-law slope of \alpha -2.2 (down to absolute
limiting magnit... | 1995-03-29 | 2009-10-28 | [
"astro-ph"
] | R. De Propris, C. J. Pritchet, W. E. Harris, R. D. McClure |
astro-ph/9503112 | CLUSTERING AND LARGE SCALE STRUCTURE WITH THE SDSS | The Sloan Digital Sky Survey (SDSS) will provide a complete imaging and
spectroscopic survey of the high-latitude northern sky. The 2D survey will
image the sky in five colors and will contain nearly 5 x 107 galaxies to g ~
23m. The spectroscopic survey will obtain spectra of the brightest 106
galaxies, 105 quasars, an... | 1995-03-29 | 2009-10-28 | [
"astro-ph"
] | Neta A. Bahcall (Princeton University Observatory) |
astro-ph/9503113 | A STRINGENT CONSTRAINT ON ALTERNATIVES TO A MASSIVE BLACK HOLE AT THE
CENTER OF NGC 4258 | There is now dynamical evidence for massive dark objects at the center of
several galaxies, but suggestions that these are supermassive black holes are
based only on indirect astrophysical arguments. The recent unprecedented
measurement of the rotation curve of maser emission sources at the center of
NGC 4258, and the ... | 1995-03-29 | 2009-10-28 | [
"astro-ph"
] | Eyal Maoz |
astro-ph/9503108 | A NEW METHOD OF STUDYING GALAXY VELOCITY FIELD: FIRST RESULTS | It is shown that the average magnitude - redshift diagram for a
magnitude-limited sample of galaxies can be effectively used for mapping galaxy
velocity field. This new approach is quantitatively introduced and applied to
the CfA, ESO/LV and ZCAT samples of galaxies. Strong arguments are presented
for infall velocities... | 1995-03-29 | 2016-06-08 | [
"astro-ph"
] | Jacek Choloniewski |
astro-ph/9503106 | NEAR-SURFACE EFFECTS IN MODELLING OSCILLATIONS OF ETA BOO | Following the report of solar-like oscillations in the G0 V star eta Boo
(Kjeldsen et al. 1995, AJ 109, 1313), a first attempt to model the observed
frequencies was made by Christensen-Dalsgaard et al. (1995, ApJ Letters, in
press). This attempt succeeded in reproducing the observed frequency
separations, although ther... | 1995-03-29 | 2007-05-23 | [
"astro-ph"
] | J. Christensen-Dalsgaard, T.R. Bedding, G. Houdek, H. Kjeldsen, C.
Rosenthal, R. Trampedach, M.J.P.F.G. Monteiro & A. Nordlund |
astro-ph/9503110 | RATING COSMOLOGICAL MODELS | I summarize the successes and failures of the most popular current
cosmological models in accounting for the available observations. This
evaluation, presented as the summary of the 11th Potsdam Workshop on
Large-Scale Structure, was discussed by all the participants. I present the
ratings given to each model based on ... | 1995-03-29 | 2007-05-23 | [
"astro-ph"
] | Neta A. Bahcall (Princeton University Observatory) |
astro-ph/9503102 | The Luminosity Function of the Coma Cluster Core for -25<M_R<-11 | We determine the luminosity function (LF) of galaxies in the core of the Coma
cluster for M_R<=-11.4 (assuming H_0=75 km/s/Mpc), a magnitude regime
previously explored only in the Local Group. Objects are counted in a deep CCD
image of Coma having RMS noise of 27.7 R mag~arcsec$^{-2}$. A correction for
objects in the f... | 1995-03-28 | 2009-10-28 | [
"astro-ph"
] | G. M. Bernstein, R. C. Nichol, J. A. Tyson, M. P. Ulmer, and D.
Wittman |
astro-ph/9503101 | The morphological identification of the rapidly evolving population of
faint galaxies | The excess numbers of blue galaxies at faint magnitudes are a long-standing
cosmological puzzle. We present new number-magnitude counts as a function of
galactic morphology from the first deep fields of the Cycle 4 Hubble Space
Telescope {\it Medium Deep Survey} project. From a sample of 301 galaxies we
define counts f... | 1995-03-28 | 2016-06-08 | [
"astro-ph"
] | Karl Glazebrook, Richard Ellis, Basilio Santiago (Institute of
Astronomy, Cambridge) and Richard Griffiths (Johns Hopkins University) |
astro-ph/9503103 | Deformation of Rapidly Rotating Compact Stars | We have developed a numerical code to study the deformation ($\varepsilon =
(I_{zz}-I_{xx})/I_{zz}$, where $I_{ii}$ are the moments of inertia) of neutron
stars in rapidly rotation in a fully general relativistic calculation. We have
found that the deformation is larger, depending on the angular velocity, than
is gener... | 1995-03-28 | 2007-05-23 | [
"astro-ph"
] | J.C.N. de Araujo, J.A. de Freitas Pacheco, M. Cattani and J.E. Horvath
(IAG/USP) |
astro-ph/9503105 | Fireballs in Dense Stellar Regions as an explanation of Gamma Ray Bursts | We study a cosmological scenario for gamma ray bursts (GRBs) where
relativistic flows interact with dense radiation fields. It is shown that this
scenario is plausible in very dense stellar regions which are known to exist in
collapsed cores of globular clusters or dense nuclei of galaxies. It yields a
correct quantita... | 1995-03-28 | 2015-06-24 | [
"astro-ph"
] | Nir J. Shaviv and Arnon Dar |
astro-ph/9503104 | Lattice Stellar Dynamics | We describe a technique for solving the combined collisionless Boltzmann and
Poisson equations in a discretised, or lattice, phase space. The time and the
positions and velocities of `particles' take on integer values, and the forces
are rounded to the nearest integer. The equations of motion are symplectic. In
the lim... | 1995-03-28 | 2015-06-24 | [
"astro-ph"
] | D. Syer and S. Tremaine, (CITA) |
astro-ph/9503107 | Cooling flows, central galaxy--cluster alignments, X-ray absorption and
dust | We present the analysis of pointed ROSAT PSPC observations of five of the
most luminous, intermediate redshift ($0.1 < z < 0.15$) clusters of galaxies
detected in the ROSAT All-Sky Survey. The PSPC data are combined with optical
CCD images and spectra to examine the relationship between clusters and their
central clust... | 1995-03-28 | 2015-06-24 | [
"astro-ph"
] | S.W. Allen, A.C. Fabian, A.C. Edge, H. Bohringer, D.A. White |
astro-ph/9503097 | The age of old Magelanic Cloud clusters. I: NGC 2257. | Deep CCD photometry down to V=24.5 is presented for the old Magellanic
Globular cluster NGC 2257. The main result cna be summarized as follows: i) the
RGB Bump has been detected at V=18.7+-0.1, and is compatible with determination
of this feature in GGCs; ii) NGC 2257 seems to be 2-3 Gyrs younger than a
typical GGC; ii... | 1995-03-27 | 2015-06-24 | [
"astro-ph"
] | V.Testa, F.R.Ferraro, E. Brocato, V. Castellani |
astro-ph/9503098 | EROS: Short period Cepheids in the bar of the LMC. | We present Fourier analysis at 490\,nm for 87 Cepheid light curves in the bar
of the Large Magellanic Cloud. The photometry has be obtained through the EROS
project whose main purpose is the search for baryonic dark matter in the
Galactic halo. The very high quality of the photometry and the good phase
coverage enable ... | 1995-03-27 | 2007-05-23 | [
"astro-ph"
] | J.P. Beaulieu (EROS collaboration) |
astro-ph/9503095 | N-body Simulations of the Small Magellanic Cloud and the Magellanic
Stream | An extensive set of N-body simulations has been carried out on the
gravitational interaction of the Small Magellanic Cloud (SMC) with the Galaxy
and the Large Magellanic Cloud (LMC). The SMC is assumed to have been a barred
galaxy with a disc-to-halo mass ratio of unity before interaction and modelled
by a large number... | 1995-03-27 | 2015-06-24 | [
"astro-ph"
] | L. Gardiner and M. Noguchi |
astro-ph/9503096 | Cluster lens reconstruction using only observed local data -- an
improved finite-field inversion technique | Gravitational light deflection can distort the images of distant sources by
its tidal effects. The population of faint blue galaxies is at sufficiently
high redshift so that their images are distorted near foreground clusters, with
giant luminous arcs being the most spectacular evidence for this effect. Much
weaker dis... | 1995-03-27 | 2007-05-23 | [
"astro-ph"
] | Stella Seitz and Peter Schneider |
astro-ph/9503099 | Thick to Thin: The Evolutionary Connection Between PG 1159 Stars and the
Thin Helium-Enveloped Pulsating White Dwarf GD 358 | Seismological observations with the Whole Earth Telescope (WET) allow the
determination of the subsurface compositional structure of white dwarf stars.
The hot DO PG 1159 has a helium surface layer with a mass of 0.001 Msun, while
the cooler DB white dwarf GD 358 has a much thinner surface helium layer of
10^-6 Msun. T... | 1995-03-27 | 2009-10-08 | [
"astro-ph"
] | Benjamin T. Dehner and Steven D. Kawaler |
astro-ph/9503094 | HELIUM PHOTODISINTEGRATION AND NUCLEOSYNTHESIS: IMPLICATIONS FOR
TOPOLOGICAL DEFECTS, HIGH ENERGY COSMIC RAYS, AND MASSIVE BLACK HOLES | We consider the production of $^3$He and $^2$H by $^4$He photodisintegration
initiated by non-thermal energy releases during early cosmic epochs. We find
that this process cannot be the predominant source of primordial $^2$H since it
would result in anomalously high $^3$He/D ratios in conflict with standard
chemical ev... | 1995-03-26 | 2008-11-26 | [
"astro-ph"
] | G.Sigl, K.Jedamzik, D.N.Schramm, and V.S.Berezinsky |
astro-ph/9503093 | THE FORMATION OF LSB GALAXIES | The formation of low surface brightness galaxies is an unavoidable prediction
of any hierarchical clustering scenario. In these models, low surface
brightness galaxies form at late times from small initial overdensities, and
make up most of the faint end of the galaxy luminosity function. Because there
are tremendous o... | 1995-03-26 | 2007-05-23 | [
"astro-ph"
] | J. J. Dalcanton, D. N. Spergel, and F J Summers |
astro-ph/9503092 | Millisecond Pulsars: Detectable Sources of Continuous Gravitational
Waves? | Laboratory searches for the detection of gravitational waves have focused on
the detection of burst signals emitted during a supernova explosion, but have
not resulted in any confirmed detections. An alternative approach has been to
search for continuous wave (CW) gravitational radiation from the Crab pulsar.
In this p... | 1995-03-25 | 2010-11-01 | [
"astro-ph",
"gr-qc"
] | Kimberly C. B. New, G. Chanmugam, Warren W. Johnson, and Joel E.
Tohline (Louisiana State University) |
astro-ph/9503090 | Cepheids in the Magellanic Clouds | In the past few years, the Magellanic Clouds have been the targets for
several major variable star surveys. The results of these surveys are now
becoming available and it is clear that a Renaissance in LMC and SMC variable
star research will result. In this review, I will describe the results of such
surveys and review... | 1995-03-25 | 2007-05-23 | [
"astro-ph"
] | D.L. Welch, C. Alcock, D.P. Bennett, K.H. Cook, R.A. Allsman, T.S.
Axelrod, K.C. Freeman, B.A. Peterson, P.J. Quinn, A.W. Rodgers, K. Griest,
S.L. Marshall, M.R. Pratt, C.W. Stubbs, and W. Sutherland (The MACHO
Collaboration) |
astro-ph/9503091 | A possible correlation between EGRET Sources and an Air-Borne experiment | In 1989, an air-borne experiments (VEGA experiment) aiming at the detection
of a few 10 GeV $\gamma$-ray were carried out. In these experiments, nine
point-source candidates along the Galactic plane were reported. In these
candidates, the five of five highest significance candidates positionally
coincide with the EGRET... | 1995-03-25 | 2007-05-23 | [
"astro-ph"
] | Ryoji Enomoto |
astro-ph/9503088 | On the Destruction and Over-Merging of Dark Halos in Dissipationless
N-body Simulations | N-body simulations that follow only a collisionless dark matter component
have failed to produce galaxy halos or substructure within dense environments.
We investigate the `over-merging' problem analytically and with numerical
simulations, by calculating dissolution timescales of halos due to physical and
artificial dy... | 1995-03-24 | 2009-10-28 | [
"astro-ph"
] | Ben Moore, Neal Katz and George Lake |
astro-ph/9503087 | The Brightness Distribution of Bursting Sources in Relativistic
Cosmologies | We present analytical solutions for the integral distribution of arbitrary
bursting or steady source counts as a function of peak photon count rate within
Friedmann cosmological models. We discuss both the standard candle and
truncated power-law luminosity function cases with a power-law density
evolution. While the an... | 1995-03-24 | 2009-10-28 | [
"astro-ph",
"gr-qc"
] | P. Meszaros and A. Meszaros |
astro-ph/9503089 | High Redshift Lyman Limit and Damped Lyman-Alpha Absorbers | We have obtained high signal:to:noise optical spectroscopy at 5\AA\
resolution of 27 quasars from the APM z$>$4 quasar survey. The spectra have
been analyzed to create new samples of high redshift Lyman-limit and damped
Lyman-$\alpha$ absorbers. These data have been combined with published data
sets in a study of the r... | 1995-03-24 | 2007-05-23 | [
"astro-ph"
] | L.J. Storrie-Lombardi, R.G. McMahon, M.J. Irwin, C. Hazard |
astro-ph/9503086 | Elimination of resonant divergences from QED in super-strong magnetic
fields | We study the resonant divergences that occur in quantum scattering
cross-sections in the presence of a strong external magnetic field. We
demonstrate that all such divergences may be eliminated by introducing
radiative corrections to the leading-order scattering amplitudes. These
corrections impose a choice of basis st... | 1995-03-23 | 2009-10-28 | [
"astro-ph"
] | Carlo Graziani, Alice K. Harding, and Ramin Sina |
astro-ph/9503085 | Are Unidentified EUV Sources the Closest Neutron Stars? | Unidentified extreme UV sources, detected in the {\it EUVE} and {\it ROSAT}
WFC all-sky surveys, could be isolated old neutron stars, accreting material
from the ISM. The closest neutron stars, that are located in the local ISM
bubble of unusually low density, are faint and cool ($L \sim 10^{27} {\rm \ erg
\ s^{-1}}$, ... | 1995-03-23 | 2016-06-08 | [
"astro-ph"
] | Amotz Shemi |
astro-ph/9503083 | WFPC2 aperture photometry and PSF modelling | Since the WFPC-2 undersamples the PSF, aperture photometry can produce
results which are competetive with profile fitting in many situations. This
article reports and investigation of aperture corrections using both real data
and PSF models. | 1995-03-22 | 2007-05-23 | [
"astro-ph"
] | N.R. Tanvir, D.R.T. Robinson, T. von Hippel |
astro-ph/9503082 | Radio observations of the gamma-ray quasar 0528+134: Superluminal motion
and an extreme scattering event | We report on multifrequency radio observations made with the Effelsberg 100-m
telescope, the IRAM 30-m telescope and the Green Bank Interferometer between
1992 and 1994 of the $\gamma$-ray quasar 0528+134. We present a new VLBI based
map of 0518+134 at 22 GHz with sub-mas angular resolution observed in November
1992, w... | 1995-03-22 | 2007-05-23 | [
"astro-ph"
] | M. Pohl, W. Reich, T. P. Krichbaum, K. Standke, S. Britzen, H. P.
Reuter, P. Reich, R. Schlickeiser, R. L. Fiedler, E. B. Waltman, F. D. Ghigo,
K. J. Johnston |
astro-ph/9503084 | Star formation in normal and barred cluster spirals | An objective prism H alpha survey has shown that there is a population of
early type spiral galaxies in nearby clusters with strong central bursts of
star formation which could be due to galaxy--galaxy tidal interactions. Such
galaxies are rarely found in the field. | 1995-03-22 | 2007-05-23 | [
"astro-ph"
] | C. Moss, M. Whittle, J.E. Pesce, H. Navarro |
astro-ph/9503081 | Lithium Abundance of Halo Dwarfs Revised | Lithium abundances in a sample of halo dwarfs have been redetermined by using
the new T$_{eff}$ derived by Fuhrmann et al (1994) from modelling of the Balmer
lines. These T$_{eff}$ are reddening independent, homogeneous and of higher
quality than those based on broad band photometry. Abundances have been derived
by gen... | 1995-03-21 | 2007-05-23 | [
"astro-ph"
] | P. Molaro (Osservatorio Astronomico di Trieste), F. Primas
(Dipartimento di Astronomia, Universita` degli Studi di Trieste) P. Bonifacio
(Dipartimento di Astronomia, Universita` degli Studi di Trieste) |
astro-ph/9503078 | On the electrodynamics of a magnetized rotating accretor | We consider the current flow in an accreting rotating neutron star (X-ray
pulsator) and propose that the active magnetosphere is limited by the Alfv\`en
surface. Formulae for the luminosity and torque due to currents circulating in
the neutron star are given, and astrophysical consequences for systems like Her
X-1 and ... | 1995-03-21 | 2015-06-24 | [
"astro-ph"
] | Aldo Treves and Ewa Szuszkiewicz |
astro-ph/9503077 | Evolution Of Gravitational Potential In The Quasilinear And Nonlinear
Regimes | We study the evolution of the power spectrum of gravitational potential
during the nonlinear clustering in an $\Omega=1$ matter dominated phase. N-body
simulations suggest that the potential does not evolve in time even in the
quasilinear phase for an $n=-1$ power spectrum. For $n=-2$, the potential
evolves in the quas... | 1995-03-21 | 2007-05-23 | [
"astro-ph"
] | J.S.Bagla and T.Padmanabhan |
astro-ph/9503079 | The Onset of the Cold HI Phase in Disks of Protogalaxies | We discuss a possible delay experienced by protogalaxies with low column
density of gas in forming stars over large scales. After the hydrogen has
recombined, as the external ionizing UV flux decreases and the metal abundance
$Z$ increases, the HI, initially in the warm phase ($T\simgt 5000$ K), makes a
transition to t... | 1995-03-21 | 2009-10-28 | [
"astro-ph"
] | Edvige Corbelli, Edwin E. Salpeter |
astro-ph/9503080 | Instabilities in Photoionized Interstellar Gas | We present a linear analysis of acoustic and thermo-reactive instabilities in
a diffuse gas, photoionized and heated by a radiation field, cooled by
collisional excitation of hydrogen and metal lines. The hydrogen recombination
reaction has a stabilizing effect on the thermal mode found by Field (1965)
since the conden... | 1995-03-21 | 2009-10-28 | [
"astro-ph"
] | Edvige Corbelli, Andrea Ferrara |
astro-ph/9503075 | On the Oxygen Abundance of Neutral Gas in I Zw 18 | Whether the H II regions of dwarf emission-line galaxies are self-polluted by
the nucleosynthetic products of massive stars remains an open question, despite
recent claims to the contrary. We show that the finding by Kunth and
collaborators that the neutral interstellar medium of I Zw 18 has a metallicity
one order of ... | 1995-03-20 | 2007-05-23 | [
"astro-ph"
] | Max Pettini (RGO, Cambridge) and Keith Lipman (IoA, Cambridge) |
astro-ph/9503076 | Massive stars as important contributors to two micron light | Near infrared light at 2 micrometers is relatively insensitive to the
presence of hot young stars and dust in galaxies, and there has been recent
interest in using it as a mass tracer in spiral galaxies. I present evidence
that young, cool supergiant stars, whose presence is indicated by strong CO
absorption in a 2.36 ... | 1995-03-20 | 2007-05-23 | [
"astro-ph"
] | James E. Rhoads (Princeton University) |
astro-ph/9503074 | FACTS AND IDEAS IN MODERN COSMOLOGY | A review of the principles of observational testing of cosmological theories
is given with a special emphasis on the distinction between observational facts
and theoretical hypotheses. A classification of modern cosmological theories
and possible observational tests for these theories is presented. The main
rival cosmo... | 1995-03-20 | 2009-10-28 | [
"astro-ph"
] | Yu. V. Baryshev F. Sylos Labini M. Montuori L. Pietronero |
astro-ph/9503071 | The Large Magellanic Cloud cluster NGC 2214 | Johnson {\it BV} CCD observations have been made of the young Large
Magellanic Cloud cluster NGC~2214 and a nearby field using the Anglo-Australian
Telescope. It has been suggested in the literature that this elliptical cluster
is actually two clusters in the process of merging. No evidence is found from
profile fittin... | 1995-03-17 | 2015-06-24 | [
"astro-ph"
] | Timothy Banks, R.J. Dodd and D.J.Sullivan |
astro-ph/9503072 | THE LOCAL GALAXY DENSITY AND THE BULGE-TO-DISK RATIO OF DISK GALAXIES | Relying on samples of disk galaxies for which a detailed photometric
bulge/disk decomposition has been provided in the literature, we examine the
dependence of the bulge-to-disk luminosity ratio (B/D) on the blue absolute
luminosity and on the environmental density. In our statistical analysis of
various B/D data sets ... | 1995-03-17 | 2016-08-30 | [
"astro-ph"
] | Giuliano Giuricin, Fusun Limboz Tektunali, Pierluigi Monaco, Fabio
Mardirossian, Marino Mezzetti |
astro-ph/9503073 | MEASURING GALAXY MASSES USING GALAXY-GALAXY GRAVITATIONAL LENSING | We report a significant detection of weak, tangential distortion of the
images of cosmologically distant, faint galaxies due to gravitational lensing
by foreground galaxies. A mean image polarisation of $<p>=0.011\pm 0.006$ is
measured for 3202 pairs of source galaxies with magnitudes $23< r \le 24$ and
lens galaxies w... | 1995-03-17 | 2016-08-30 | [
"astro-ph"
] | Tereasa Brainerd, Roger Blandford, and Ian Smail |
astro-ph/9503068 | WHEN DO SUPERNOVA NEUTRINOS OF DIFFERENT FLAVORS HAVE SIMILAR
LUMINOSITIES BUT DIFFERENT SPECTRA ? | Muon and tau neutrinos ($\nu_x$) interact with protoneutron star matter only
via neutral currents and exchange energy with the stellar gas predominantly by
neutrino-electron scattering and neutrino-pair processes. In contrast, electron
neutrinos and antineutrinos ($\nu_e$ and $\bar\nu_e$) are frequently absorbed
and pr... | 1995-03-16 | 2016-08-30 | [
"astro-ph",
"hep-ph"
] | H.-Thomas Janka (Department of Astronomy and Astrophysics, University
of Chicago) |
astro-ph/9503069 | Protostellar Jets: The Best Laboratories for Investigating Astrophysical
Jets | Highly collimated supersonic jets are observed to emerge from a wide variety
of astrophysical objects, ranging from Active Nuclei of Galaxies (AGN's) to
Young Stellar Objects (YSOs) within our own Galaxy. Despite their different
physical scales (in size, velocity, and amount of energy transported), they
have strong mor... | 1995-03-16 | 2015-06-24 | [
"astro-ph"
] | Elisabete M. de Gouveia Dal Pino |
astro-ph/9503067 | Multi-Band Images of the Barred Galaxy NGC 1097 | We present $B,V,R,J,H,K$ broad--band images of the barred galaxy NGC 1097.
The optical and infrared colors maps trace the location of the major dust
features. The dust lanes are relatively free of star formation and have low
opacity. The depth of the dust lanes decreases as a function of wavelength so
that they are dee... | 1995-03-16 | 2009-10-28 | [
"astro-ph"
] | A. C. Quillen, Jay. A. Frogel, L. E. Kuchinski, D. M. Terndrup |
astro-ph/9503065 | CCD Photometry of Distant Open Clusters. II -- NGC 6791 | Three new photometric CCD-based datasets are presented for NGC~6791. They
consist of deep UBV photometry (to $V_{lim} =24$, $B_{lim}=24$, $U_{lim} = 23$)
of the central parts of the cluster and of selected fields around it, and of
relatively shallower UBVI photometry for the whole cluster ($23' \times 23'$).
The data h... | 1995-03-16 | 2016-08-30 | [
"astro-ph"
] | Janusz Kaluzny (Warsaw University) and Slavek Rucinski (University of
Toronto) |
astro-ph/9503064 | A FIRST DETERMINATION OF THE SURFACE DENSITY OF GALAXY CLUSTERS AT VERY
LOW X--RAY FLUXES | We present the first results of a serendipitous search for clusters of
galaxies in deep ROSAT-PSPC pointed observations at high galactic latitude. The
survey is being carried out using a Wavelet based Detection Algorithm which is
not biased against extended, low surface brightness sources. A new
flux--diameter limited ... | 1995-03-16 | 2016-08-30 | [
"astro-ph"
] | P. Rosati, R. Della Ceca, R. Burg, C. Norman, R. Giacconi |
astro-ph/9503070 | Empirical Constraints on Source Properties and Host Galaxies of
Cosmological Gamma-Ray Bursts | We discuss several constraints on the properties of gamma-ray bursts (GRB) at
cosmological distances. First we use the requirement that burst sources must be
optically thin to pair production by photon-photon collisions in order to
produce the observed nonthermal spectra. We derive probability distributions
for the min... | 1995-03-16 | 2009-10-28 | [
"astro-ph"
] | Eric Woods and Abraham Loeb (Harvard Univ.) |
astro-ph/9503066 | The Dwarf Galaxy NGC 1705 -- A Highly Composite Stellar Population | We present visible and near-infrared images of the amorphous dwarf galaxy NGC
1705 in the $B$, $V$, $R$, $J$, $H$, and $K$ bands. Optical and near infrared
colors in the galaxy are consistent with a composite population with colors
similar to those of the bluest Sc nuclei. The contribution of young stars to
the disk po... | 1995-03-16 | 2016-08-15 | [
"astro-ph"
] | A. C. Quillen, Solange V. Ram\'irez, Jay A. Frogel |
astro-ph/9503061 | EMBEDDED CLUSTERS IN GIANT EXTRAGALACTIC HII REGIONS II. EVOLUTIONARY
POPULATION SYNTHESIS MODEL | A stellar population synthesis model, suitable for comparison with Giant
Extragalactic HII Regions (GEHRs), is constructed incorporating the recent
developments in modelling stellar evolution by Maeder and co-workers and
stellar atmospheres by Kurucz. A number of quantities suitable for comparison
with broad band data ... | 1995-03-15 | 2016-08-30 | [
"astro-ph"
] | Y.D. Mayya |
astro-ph/9503059 | M Giant Kinematics in Off-Axis Fields Between 150 and 300 Parsecs from
the Galactic Center | We present radial velocities for approximately 40 stars in each of three
optically obscured, off-axis, fields toward the Galactic bulge. Combined with
the data presented by Blum et al. (1994), we now have mean radial velocities
and radial velocity dispersions in four fields towards the Galactic bulge.
These four fields... | 1995-03-15 | 2016-08-30 | [
"astro-ph"
] | Robert Blum, John Carr, Kris Sellgren, and Don Terndrup |
astro-ph/9503060 | Probing the Extraordinary Ends of Ordinary Stars: White Dwarf Seismology
with the Whole Earth Telescope | During the final evolution of most stars, they shed their outer skin and
expose their core of the hot ashes of nuclear burning. As these hot and very
dense cores cool into white dwarf stars, they go through episodes of
multiperiodic, nonradial g-mode pulsation. The tools of stellar seismology
allow us to use the pulsat... | 1995-03-15 | 2007-05-23 | [
"astro-ph"
] | Steven D. Kawaler (Iowa State University) |
astro-ph/9503062 | Phase Transitions in the ISM --- A Source of Dissipative Behaviour | In this paper, by considering a simple fluid model, we investigate the role
of phase transitions in the ISM on the galaxy scale gas dynamics. Cooling and
heating timescales in the ISM are typically shorter than typical galactic
rotation timescales, so the individual phases in the ISM can be assumed to be
in temperature... | 1995-03-15 | 2016-08-30 | [
"astro-ph"
] | A. C. Quillen, C. B. Quillen |
astro-ph/9503063 | HST Observations of Giant Arcs: High Resolution Imaging Of Distant Field
Galaxies. | We present HST imaging of eight spectroscopically-confirmed giant arcs, pairs
and arclets. These objects have all been extensively studied from the ground
and we demonstrate the unique advantages of HST imaging in the study of such
features by a critical comparison of our data with the previous observations.
In particu... | 1995-03-15 | 2016-08-30 | [
"astro-ph"
] | Ian Smail, Alan Dressler, Jean-Paul Kneib, Richard S. Ellis, Warrick
J. Couch, Ray M. Sharples & Augustus Oemler Jr. |
astro-ph/9503058 | MORE ON SOLAR-LIKE OSCILLATIONS IN ETA BOO | We recently reported strong evidence for solar-like oscillations in the G0 IV
star eta Boo (Kjeldsen et al. 1995, AJ 109, 1313). We measured small
temperature fluctuations produced by oscillations through their effect on the
equivalent widths of the Balmer lines. Here we address several issues that were
raised at this ... | 1995-03-14 | 2016-08-30 | [
"astro-ph"
] | T.R. Bedding & H. Kjeldsen |
astro-ph/9503057 | CHEMICAL ABUNDANCES IN CLUSTERS OF GALAXIES | We study the origin of iron and alpha-elements (O, Mg, Si) in clusters of
galaxies. In particular, we discuss the [O/Fe] ratio and the iron
mass-to-luminosity ratio in the intracluster medium (ICM) and their link to the
chemical and dynamical evolution of elliptical and lenticular galaxies. We
adopt a detailed model of... | 1995-03-14 | 2016-08-30 | [
"astro-ph"
] | Francesca Matteucci and Brad K. Gibson |
astro-ph/9503056 | MOND and the seven dwarfs | Gerhard had recently analyzed the data on seven dwarf spheroidals, and
concluded that these disagree with the predictions of MOND. We contend that
this conclusion is anything but correct. With new data for three of the dwarfs
the observations of all dwarfs are in compelling agreement with the predictions
of MOND. Gerha... | 1995-03-14 | 2016-08-30 | [
"astro-ph"
] | Mordehai Milgrom (Weizmann Institute) |
astro-ph/9503054 | The COBE Normalization of CMB Anisotropies | With the advent of the COBE detection of fluctuations in the Cosmic Microwave
Background radiation, the study of inhomogeneous cosmology has entered a new
phase. It is now possible to accurately normalize fluctuations on the largest
observable scales, in the linear regime. In this paper we present a
model-independent m... | 1995-03-14 | 2009-08-18 | [
"astro-ph"
] | Martin White and Emory F. Bunn |
astro-ph/9503052 | Magnetic cycles and photometric variability of T Tauri stars | We consider the effects of stellar magnetic cycles on disc accretion in T
Tauri stars where the inner region of the disc is disrupted by the stellar
field. Using time-dependent disc models, we show that order unity variations in
field strength can strongly modulate the accretion flow for cycle time-scales
of years to d... | 1995-03-13 | 2015-06-24 | [
"astro-ph"
] | P.J. Armitage |
astro-ph/9503050 | Spectroscopy of Candidate Young Globular Clusters in NGC 1275 | We present spectra of the brightest member of the population of compact blue
objects discovered in the peculiar galaxy NGC 1275 by Holtzman et al. using
Hubble Space Telescope images. These spectra show strong Balmer absorption
lines like those observed in A-type stars, as expected if the object is a young
globular clu... | 1995-03-13 | 2009-10-28 | [
"astro-ph"
] | Stephen E. Zepf, Dave Carter, Ray M. Sharples, and Keith M. Ashman |
astro-ph/9503053 | Tidal Excitation of Modes in Binary Systems with Applications to Binary
Pulsars | We consider the tidal excitation of modes in a binary system of arbitrary
eccentricity. For a circular orbit, the modes generally undergo forced
oscillation with a period equal to the orbital period ($T$). For an eccentric
orbit, the amplitude of each tidally excited mode can be written approximately
as the sum of an o... | 1995-03-13 | 2016-08-30 | [
"astro-ph"
] | Pawan Kumar, Chi On Ao, and Eliot J. Quataert |
astro-ph/9503051 | ROTATION CURVES OF 967 SPIRAL GALAXIES: IMPLICATIONS FOR DARK MATTER. | We present the rotation curves of 967 spiral galaxies, obtained by
deprojecting and folding the raw data published by Mathewson et al. (1992). Of
these, 80 meet objective excellence criteria and are suitable for individual
detailed mass modelling, while 820 are suitable for statistical studies. A
preliminary analysis o... | 1995-03-13 | 2016-08-30 | [
"astro-ph"
] | Massimo Persic, Paolo Salucci, and Fulvio Stel |
astro-ph/9503055 | X-ray variability and 1mHz oscillations in TT ARI | Using the archival ROSAT observation of TT Ari, X-ray energy spectra in
different orbital phases and power spectra of the intensity time series are
presented. Spectral fits show that the source gets brighter during the
observation. The orbital modulation of the X-ray counting rate and
bremsstrahlung temperature suggest... | 1995-03-13 | 2007-05-23 | [
"astro-ph"
] | A.Bayka, A.Esendemir, U. Kiziloglu, M. A. Alpar, H. Ogelman, N.Ercan,
G. Ikis |
astro-ph/9503048 | Late-Type Stars in M31. I.: A Photometric Study of AGB Stars and
Metallicity Gradients. | We have imaged five 7\arcmin \x 7\arcmin\ fields in M31 spanning
galactocentric radii from 4 to 32 kpc along the SW-major axis. The fields were
observed through two broad-band (\V\ and \I) and two narrow-band (\CN\ and
\TiO) filters. The broad-band data were used to construct \IvsVI\
color-magnitude diagrams (CMDs) and... | 1995-03-11 | 2016-08-30 | [
"astro-ph"
] | J.P. Brewer, H.B. Richer and D.R. Crabtree |
astro-ph/9503049 | A search for X-rays from five pulsars: PSR's 0740-28, 1737-30, 1822-09,
1915+13 and 1916+14 | We report observations of PSR's 0740-28, 1737-30, 1822-09, 1915+13 and
1916+14 with ROSAT. In the 0.1-2.1 keV range upper limits to luminosity are
derived for power law and blackbody spectra, using a range of $N_{H}$
estimates. The upper limit to the blackbody luminosity from PSR1822-09 turns
out to be consistent with ... | 1995-03-11 | 2007-05-23 | [
"astro-ph"
] | M. A. Alpar, O. H. Guseinov, U. Kiziloglu, H. Ogelman |
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