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/9410030 | The ESO All-Southern-Sky Redshift Survey of ROSAT Clusters of Galaxies | We discuss the rationale and the present status of a large redshift survey
aiming at measuring distances for all the clusters of galaxies detected by the
ROSAT X--ray All--Sky Survey in the southern hemisphere, with flux larger than
$\sim 2\times 10^{-12}$ erg s$^{-1}$ cm$^{-2}$. The survey is being performed
using thr... | 1994-10-11 | 2007-05-23 | [
"astro-ph"
] | Luigi Guzzo, et al |
astro-ph/9410028 | On strangelets in magnetosphere | A short discussion is provided on the hypothesis of strange quark dust of low
specific charge in the terrestrial magnetosphere. We suggest by means of rough
estimates the possible existence of a strangelet belt in the magnetosphere. | 1994-10-10 | 2008-11-26 | [
"astro-ph"
] | Haret C. Rosu |
astro-ph/9410029 | Pictor A: A New Double-Peaked Emission Line Quasar | We obtained a new spectrum for the radio galaxy Pictor~A in December 1993.
Comparison with previous data obtained in 1983 and 1987 shows that the broad
component of the Balmer lines has increased considerably in strength and
complexity. The Balmer lines now show a boxy, double peaked profile with
FWZI$\sim$24000 \kms. ... | 1994-10-10 | 2009-10-22 | [
"astro-ph"
] | J. W. Sulentic, P. Marziani, T. Zwitter, M. Calvani |
astro-ph/9410027 | Nucleosynthesis in the Presence of Primordial Isocurvature Baryon
Fluctuations | We study big bang nucleosynthesis in the presence of large mass-scale,
non-linear entropy fluctuations. Overdense regions, with masses above the local
baryon-Jeans mass, are expected to collapse and form condensed objects.
Surviving nucleosynthesis products therefore tend to originate from underdense
regions. We comput... | 1994-10-07 | 2009-10-22 | [
"astro-ph"
] | K. Jedamzik and G.M. Fuller |
astro-ph/9410026 | Modelling Galaxies with f(E,Lz); a Black Hole in M32 | A technique for the construction of axisymmetric distribution functions for
individual galaxies is presented. It starts from the observed surface bright-
ness distribution, which is deprojected to gain the axisymmetric luminosity
density, from which follows the stars' gravitational potential. After adding
dark mass com... | 1994-10-07 | 2015-06-24 | [
"astro-ph"
] | Walter Dehnen |
astro-ph/9410021 | Accretion Disc Turbulence and the X-Ray Power Spectra of Black Hole High
States | The high state of black hole candidates is characterized by a quasi- thermal
emission component at $kT \sim 1$ keV. In addition, this state tends to have
very low variability which indicates that it is relatively stable, at least on
{\it short} time scales. Most models of the high state imply that the bulk of
the emiss... | 1994-10-06 | 2015-06-24 | [
"astro-ph"
] | Michael A. Nowak and Robert V. Wagoner |
astro-ph/9410022 | Damped Lyman Alpha Systems vs. Cold + Hot Dark Matter | Damped Ly$\alpha$ systems provide possibly the most significant evidence for
early structure formation, and thus a stringent constraint on the Cold + Hot
Dark Matter (CHDM) cosmology. Using the numbers of halos in N-body simulations
to normalize Press-Schechter (PS) estimates of the number densities of
protogalaxies as... | 1994-10-06 | 2009-09-25 | [
"astro-ph"
] | Anatoly Klypin, Stefano Borgani, Jon Holtzman, & Joel Primack |
astro-ph/9410024 | CBR Temperature Fluctuations Induced by Gravitational Waves in a
Spatially-Closed Inflationary Universe | Primordial gravitational waves are created during the de Sitter phase of an
exponentially-expanding (inflationary) universe, due to quantum zero-point
vacuum fluctuations. These waves produce fluctuations in the temperature of the
Cosmic Background Radiation (CBR). We calculate the multipole moments of the
correlation ... | 1994-10-06 | 2022-09-07 | [
"astro-ph",
"gr-qc",
"hep-th"
] | Bruce Allen, Robert Caldwell, Scott Koranda |
astro-ph/9410025 | Field Galaxy Evolution Since Z~1 from a Sample of QSO
Absorption-Selected Galaxies | We present some of the results of a large survey aimed at establishing the
properties of galaxies selected by their having produced detectable Mg~II
$\lambda\lambda 2796$, 2803 absorption in the spectra of background QSOs. The
present sample covers the redshift range $0.2 \le z \le 1.0 $, with $\langle z
\rangle = 0.65... | 1994-10-06 | 2019-08-15 | [
"astro-ph"
] | C. Steidel, M. Dickinson, and S.E. Persson |
astro-ph/9410023 | Dispersal and Mixing of Oxygen in the Interstellar Medium of Gas-Rich
Galaxies | Stellar and nebular abundance indicators reveal that there exists significant
abundance fluctuations in the interstellar medium (ISM) of gas-rich galaxies.
It is shown that at the present observed solar level of O/H $\sim 6 \times
10^{-4}$, abundance differences of a factor of two, such as existing between
the Sun and ... | 1994-10-06 | 2007-05-23 | [
"astro-ph"
] | Jean-Rene ROY (Quebec,Canada), Daniel KUNTH (Paris,France) |
astro-ph/9410020 | A New Method for Measuring the Hi Gunn-Peterson Effect at High Redshift | In order to carry out a systematic and thorough measurement of the HI
Gunn-Peterson effect at high redshift, a quantitatively testable and repeatable
procedure, in particular, a robust statistical weighting technique, is
developed. It is applied to an echelle spectrum of resolution 15 km s$^{-1}$ of
PKS 1937-101 with z... | 1994-10-05 | 2009-10-22 | [
"astro-ph"
] | Yihu Fang and Arlin Crotts |
astro-ph/9410019 | An Optical Corrector Design That Allows a Fixed Telescope to Access a
Large Region of the Sky | We discuss a family of two-mirror correctors that can greatly extend the
field accessible to a fixed telescope such as a liquid mirror telescope. The
performance of the corrector is remarkable since it gives excellent images in
patches contained within a field greater than 45 degrees. We argue that this
performance mak... | 1994-10-05 | 2007-05-23 | [
"astro-ph"
] | E.F. Borra, G. Moretto, and M. Wang |
astro-ph/9410018 | The Stromlo-APM Redshift Survey II. Variation of Galaxy Clustering with
Morphology and Luminosity | We present clustering measurements for samples of galaxies selected by
morphological type and luminosity from the recently completed Stromlo-APM
Redshift Survey. Early type galaxies are clustered more strongly by a factor
3.5--5.5, than late type galaxies. Low-luminosity galaxies are clustered more
weakly by a factor o... | 1994-10-05 | 2009-10-22 | [
"astro-ph"
] | J.Loveday, S.J.Maddox, G.Efstathiou and B.A.Peterson |
astro-ph/9410015 | Variable Stars in the Field of the Open Cluster NGC 7789 | Fifteen variable stars have been discovered during four nights of monitoring
of NGC 7789. It was possible to determine periods for ten of these variables.
Seven objects are W UMa-type binaries, in this number five are members of the
cluster. Among the remaining variables, there are three further close binaries,
one del... | 1994-10-05 | 2007-05-23 | [
"astro-ph"
] | K. Jahn, J. Kaluzny, and S. M. Rucinski |
astro-ph/9410016 | A case for a baryonic dark halo | Recent observations of microlensing events in the Large Magellanic Cloud by
the MACHO and EROS collaborations suggest that an important fraction of the
galactic halo is in the form of Massive Halo Objects (MHO) with mass $\sim 0.1
M_{\odot}$. We outline a scenario in which dark clusters of MHO with mass $\sim
0.1 M_{\o... | 1994-10-05 | 2009-10-22 | [
"astro-ph"
] | F. De Paolis, G. Ingrosso, Ph. Jetzer and M. Roncadelli |
astro-ph/9410017 | A Potential Cyclotron Line Signature in Low Luminosity X-Ray Sources | Estimates indicate there may be $\simgreat 10^3$ low luminosity X-ray pulsars
($L \simless 10^{34} \rom{erg\;s^{-1}}$) in the Galaxy undergoing ``low-state''
wind accretion in Be/X-ray binary systems, and $\sim 10^8-10^9$ isolated
neutron stars which may be accreting directly from the interstellar medium.
Despite their... | 1994-10-05 | 2009-10-22 | [
"astro-ph"
] | Robert W. Nelson, John C.L. Wang, E.E. Salpeter, and Ira Wasserman |
astro-ph/9410014 | Influence of Cooling Flow and Galactic Motion on the Iron Distribution
in Clusters of Galaxies | Iron abundance distribution is now known for 12 clusters of galaxies. For
some clusters (e.g. Centaurus) the observed abundance increases toward the
cluster center, while for the others (e.g. Coma and Hydra-A) no significant
inhomogeneity was observed. In order to understand this difference, we
investigate the influenc... | 1994-10-05 | 2009-10-22 | [
"astro-ph"
] | Yutaka Fujita and Hideo Kodama |
astro-ph/9410013 | Missing Opacity in the Atmospheric Models of Red Giants | Synthetic spectra of Arcturus computed with the latest theoretical stellar
atmospheres disagree strongly with both the spectral energy distribution and
with the spectroscopic data for $\lambda < 4000$ \AA , even though the stellar
parameters are well constrained. We find that the discrepancy can be removed by
adding a ... | 1994-10-04 | 2009-10-22 | [
"astro-ph"
] | C. I. Short and J. B. Lester |
astro-ph/9410012 | Black holes in galactic nuclei: the dynamical evidence | The dynamical evidence for black holes (BHs) in galactic nuclei is reviewed,
with emphasis on recent improvements in spatial resolution, methods for
analyzing galaxy spectra and dynamical modeling. M31, M32 and M87 are discussed
in some detail. | 1994-10-04 | 2007-05-23 | [
"astro-ph"
] | Roeland P. van der Marel |
astro-ph/9410010 | Yet Another Paper on Sn1987a: Large Angle Oscillations, and the Electron
Neutrino Mass | We supplement \ML methods with a \MC simulation to re-investigate the SN1987A
neutrino burst detection by the IMB and Kamiokande experiments. The detector
simulations include background in the the latter and ``dead-time'' in the
former. We consider simple neutrinosphere cooling models, explored previously
in the litera... | 1994-10-04 | 2008-11-26 | [
"astro-ph",
"hep-ph"
] | Peter J. Kernan and Lawrence M. Krauss |
astro-ph/9410011 | Thick Penumbra in a Magnetostatic Sunspot Model | The conjecture that energy transport in sunspot penumbrae occurs through
convection by an interchange of magnetic flux tubes is used in order to
construct a magnetostatic model for a deep penumbra which is part of a global
sunspot model. The model describes an overall mechanical equilibrium between
the three stratifica... | 1994-10-04 | 2008-02-03 | [
"astro-ph"
] | K. Jahn and H.U. Schmidt |
astro-ph/9410009 | Hydrodynamic Simulations of Galaxy Formation. I. Dissipation and the
Maximum Mass of Galaxies | We describe an accurate, one-dimensional, spherically symmetric, Lagrangian
hydrodynamics/gravity code, designed to study the effects of radiative cooling
and photo-ionization on the formation of protogalaxies. The code can treat an
arbitrary number of fluid shells (representing baryons) and collisionless
shells (repre... | 1994-10-04 | 2009-10-22 | [
"astro-ph"
] | A.A. Thoul and D.H. Weinberg |
astro-ph/9410003 | Electromgnetic-gravitational cross-sections in external elctromagnetic
fields | The classical processes: the conversion of photons into gravitons in the
static electromagnetic fields are considered by using Feynman perturbation
techniques. The differential cross sections are presented for the conversion in
the electric field of the flat condesor and the magnetic field of the selenoid.
A numerical ... | 1994-10-03 | 2008-11-26 | [
"astro-ph"
] | Hoang Ngoc Long, Dang Van Soa, and Tuan A. Tran |
astro-ph/9410008 | Liquid Mirrors: A Review | The surface of a spinning liquid takes the shape of a paraboloid that can be
used as a reflecting mirror. This very old and nearly forgotten concept has
recently been revived and I review its present status. Extensive
interferometric tests of liquid mirrors (the largest one having a diameter of
2.5-meters ) show excell... | 1994-10-03 | 2007-05-23 | [
"astro-ph"
] | Ermanno F. Borra |
astro-ph/9410004 | Simulations of the Microwave Sky and of its ``Observations'' | Here follows a preliminary report on the construction of fake millimeter and
sub-millimeter skies, as observed by virtual instruments, e.g. the COBRA/SAMBA
mission, using theoretical modeling and data extrapolations. Our goal is to
create maps as realistic as possible of the relevant physical contributions
which may co... | 1994-10-03 | 2009-10-22 | [
"astro-ph"
] | F.R. Bouchet, R. Gispert, N. Aghanim, J.R. Bond, A. De Luca, E. Hivon,
and B. Maffei |
astro-ph/9410002 | Stellar Mass Loss-Driven Wind Models of Elliptical Galaxies? | Recent claims in the literature (Bressan, Chiosi & Fagotto 1994) that the
epoch describing the onset of galactic winds in spheroidal star systems has
been severely overestimated in the past, due to the neglect of energy deposited
in the interstellar medium from stellar winds, is evaluated in the light of a
more conserv... | 1994-10-03 | 2016-06-08 | [
"astro-ph"
] | Brad K. Gibson |
astro-ph/9410001 | Newtonian Evolution of the Weyl Tensor | In an interesting recent paper on the growth of inhomogeneity through the
effect of gravity [1], Bertschinger and Hamilton derive equations for the
electric and magnetic parts of the Weyl tensor for cold dust for both General
Relativity and Newtonian theory. Their conclusion is that both in General
Relativity and in Ne... | 1994-10-03 | 2009-10-22 | [
"astro-ph",
"gr-qc"
] | G.F.R. Ellis and P.K.S. Dunsby |
astro-ph/9410007 | Large Scale Baryon Isocurvature Inhomogeneities | Big bang nucleosynthesis constraints on baryon isocurvature perturbations are
determined. A simple model ignoring the effects of the scale of the
perturbations is first reviewed. This model is then extended to test the claim
that large amplitude perturbations will collapse, forming compact objects and
preventing their ... | 1994-10-03 | 2009-09-25 | [
"astro-ph"
] | Craig J. Copi, Keith A. Olive, and David N. Schramm |
astro-ph/9410006 | Major axis kinematics of 15 early-type galaxies in the Fornax cluster | Major axis rotation curves and velocity dispersions profiles, extending out
to about one effective radius, are presented for 15 ellipticals and S0's out of
the photometric sample of Fornax cluster galaxies studied by Caon \etal\
(1994). A brief description of the spectroscopic and photometric
characteristics of each ga... | 1994-10-03 | 2007-05-23 | [
"astro-ph"
] | M.D'Onofrio, S.R.Zaggia, G.Longo, N.Caon, and M.Capaccioli |
astro-ph/9410005 | Integrability Conditions for Irrotational Dust with a Purely Electric
Weyl Tensor: A Tetrad Analysis | All spacetimes for an irrotational collisionless fluid with a purely electric
Weyl tensor, with spacetime curvature determined by the exact Einstein field
equations, are shown to be integrable. These solutions include the relativistic
generalisations of the Zeldovich solutions of Newtonian theory. Thus our result
shows... | 1994-10-03 | 2009-10-22 | [
"astro-ph",
"gr-qc"
] | W.M. Lesame, P.K.S. Dunsby and G.F.R. Ellis |
astro-ph/9409095 | FeII and FeI emission in IRAS 07598+6508 and PHL 1092 | One of the puzzles in understanding the spectra of active galactic nuclei
(AGN) is the origin of the FeII emission. FeI emission, if present, will help
reveal the physical conditions of the emitting gas. In an attempt to verify the
presence of FeI lines, high S/N spectra of two FeII-strong quasars, IRAS
07598-6508 and ... | 1994-10-01 | 2009-10-22 | [
"astro-ph"
] | John Kwan, Fu-zhen Cheng, Li-Zhi Fang, Wei Zheng and Jian Ge |
astro-ph/9409094 | Studying Structure Formation With Large Galaxy Redshift Surveys | I outline the connections between some of the most widely used statistical
measures of galaxy clustering and the fundamental issues in the theory of
structure formation. I devote particular attention to the problem of biasing,
i.e. to a possible difference between the distribution of galaxies and the
distribution of ma... | 1994-09-30 | 2007-05-23 | [
"astro-ph"
] | David H. Weinberg |
astro-ph/9409081 | Moment Analysis Applied to LMC Star Clusters | Statistical moment-based ellipse fitting was performed on observations of
Large Magellanic Cloud clusters, confirming that trends are evident in their
position angles and ellipticities, as had been reported in the literature.
Artificial cluster images with known parameters were generated, and subjected
to the same anal... | 1994-09-29 | 2015-06-24 | [
"astro-ph"
] | Timothy Banks, R.J. Dodd and D.J. Sullivan |
astro-ph/9409084 | Globular Clusters in the Magellanic Clouds.I:BV CCD-Photometry for 11
Clusters | We present BV CCD-data for 11 intermediate-age LMC clusters; the main
conclusions are: 1. in the (V_to, V_cl,m) and (V-to, (V_to-V_cl,m)) planes the
models yield a good overall description of the data; 2. with the current
sample, it is impossible to firmly choose between "classical" and
"overshooting" models; 3. the se... | 1994-09-29 | 2019-08-17 | [
"astro-ph"
] | C.E. Corsi, R. Buonanno, F. Fusi Pecci, F.R. Ferraro, V. Testa, L.
Greggio |
astro-ph/9409089 | Magnitude Offset between Lensed Stars and Observed Stars - a New Probe
of the Structure of the Galactic Bar | We propose a new method that can be used to constrain the properties of the
Galactic bar (bulge). If the majority of the lensing objects are in the
Galactic bar, then we predict a systematic offset in the apparent magnitude
between lensed stars and all observed stars. Using OGLE color-magnitude diagram
data we model th... | 1994-09-29 | 2009-10-22 | [
"astro-ph"
] | K. Z. Stanek (Princeton University Observatory) |
astro-ph/9409085 | Globular Clusters in the Magellanic Clouds.II: IR-Array Photometry for
12 Globulars and Contributions to the Integrated Cluster Light | We report the results of the observations in the JHK bands of 12 globular
clusters in the LMC, and present CMDs down to K=16 for about 450 stars. We
merge the data with the BV ones presented in paper I and use the merged data to
study the evolution of integrated magnitudes and colours of SSPs. We find that
the AGB cont... | 1994-09-29 | 2015-06-24 | [
"astro-ph"
] | F.R. Ferraro, F. Fusi Pecci, V. Testa, L. Greggio, R. Buonanno, C.E.
Corsi, C.M. Terndrup H. Zinnecker |
astro-ph/9409092 | Mount Pinatubo and Atmospheric Extinction at Mount John University
Observatory 1987-94 | Atmospheric extinction in the V passband at Mount John University
Observatory, New Zealand, from 1987-94 is presented and the effect of the 1991
Mount Pinatubo volcanic eruption is discussed. | 1994-09-29 | 2007-05-23 | [
"astro-ph"
] | M.C. Forbes, T. Banks, D.J. Sullivan, R.J. Dodd, A.C. Gilmore and P.M.
Kilmartin |
astro-ph/9409083 | A Technique Fof Determining the Extragalactic Distance Scale | We propose a method of distance determination based on the internal structure
and dynamics of disk galaxies. The method relies on the universal luminosity
profile of a stellar disk represented by an exponential law. Calibrating nearby
galaxies with known distances, it is found that the scale length of the disk is
tight... | 1994-09-29 | 2009-10-22 | [
"astro-ph"
] | Masashi Chiba & Yuzuru Yoshii |
astro-ph/9409090 | Dense Stellar Cores in Merger Remnants | We use numerical models which include star formation to analyze the mass
profiles of remnants formed by mergers of disk galaxies. During a merger,
dissipation in gas and ensuing star formation leave behind a dense stellar core
in the remnant. Rather than joining smoothly onto a de Vaucouleurs profile, the
starburst pop... | 1994-09-29 | 2007-05-23 | [
"astro-ph"
] | Chris Mihos and Lars Hernquist |
astro-ph/9409093 | When Does the Richardson-Lucy Deconvolution Converge ? | (\rl = Richardson-Lucy) We propose a simulation-based bootstrap method to
access global significance levels of deconvolution models in the \rl and other
iterative restoration algorithms that converge locally. These significance
levels allow one to check at each iterative step how good the model is and when
iterations c... | 1994-09-29 | 2007-05-23 | [
"astro-ph"
] | Hongguang Bi, Gerhard Boerner (MPI fuer Astrophysik, GERMANY) |
astro-ph/9409091 | The Evolution of X-Ray Clusters in a Cold Plus Hot Dark Matter Universe | We present the first self-consistently computed results on the evolution of
X-ray properties of galaxy clusters in a Cold + Hot Dark Matter (CHDM) model.
We have performed a hydrodynamic plus N-body simulation for the COBE-compatible
CHDM model with standard mass components: Omega(hot) = 0.3, Omega(cold) = 0.6
and Omeg... | 1994-09-29 | 2009-10-22 | [
"astro-ph"
] | Greg L. Bryan, Anatoly Klypin, Chris Loken, Michael L. Norman, Jack O.
Burns |
astro-ph/9409082 | Can globular clusters be as young as 10 Gyr?--The Uncertainties in the
Age of Globular Clusters from Their Helium Abundance and Mass Loss | The age of globular clusters inferred from observations depends sensitively
on assumptions such as the initial helium abundance and the mass loss rate. A
high helium abundance (e.g., $Y\approx$0.28), as well as an inclusion of helium
diffusion and oxygen-enhancement in stellar models, can lower the current age
estimate... | 1994-09-29 | 2008-02-03 | [
"astro-ph"
] | Xiangdong Shi |
astro-ph/9409088 | Lyman Alpha Absorption and Tidal Debris | The origin and evolution of structure in the Universe is one of the major
questions occupying astronomers today. An understanding of the Lyalpha
absorbers seen in QSO spectra is an important part of this program since such
absorbers can be traced back to very high redshifts. Their mere existence
places constraints on t... | 1994-09-29 | 2007-05-23 | [
"astro-ph"
] | Simon L. Morris |
astro-ph/9409086 | Fokker-Planck models of NGC 6397 -- A. The modeling | This is the first of two papers presenting a detailed examination of
Fokker-Planck models for the globular cluster NGC 6397. I show that these
models provide a good match to observations of the surface density profile,
mass functions at three radii and the velocity dispersion profile. The
constraint of requiring the be... | 1994-09-29 | 2007-05-23 | [
"astro-ph"
] | G.A. Drukier |
astro-ph/9409087 | Fokker-Planck models of NGC 6397 -- B. The globular cluster | This is the second of two papers presenting a detailed examination of
Fokker-Planck models for the globular cluster NGC 6397 and is concerned with
extracting information on the cluster from the models. The models give a
current cluster mass of $6.6\pm 0.5\times 10^4 \Msolar$ of which about 2500
\Msolar\ is in neutron s... | 1994-09-29 | 2007-05-23 | [
"astro-ph"
] | G.A. Drukier |
astro-ph/9409076 | The Infrared Band Strengths of H2o, Co and Co2 in Laboratory Simulations
of Astrophysical Ice Mixtures | Infrared spectroscopic observations toward objects obscured by dense cloud
material show that H$_2$O, CO and, likely, CO$_2$ are important constituents of
interstellar ice mantles. In order to accurately calculate the column densities
of these molecules, it is important to have good measurements of their infrared
band ... | 1994-09-28 | 2008-02-03 | [
"astro-ph"
] | P.A. Gerakines, W.A. Schutte, J.M. Greenberg, and Ewine F. van
Dishoeck |
astro-ph/9409073 | Evolution of Galactic Nuclei with 10 $M_\odot$ Black Holes | A star with main sequence mass greater than $25\sim 30\msun$ may collapse to
a black hole of about 10 $\msun$ at the final stage of the evolution. About an
order of 1\% of stellar mass is likely to be in form of such black holes in
galaxies. We have examined the dynamics of two-component stellar systems
composed of 0.7... | 1994-09-28 | 2015-06-24 | [
"astro-ph"
] | Hyung Mok Lee |
astro-ph/9409075 | The Observed Properties of High-Redshift Cluster Galaxies | We use the semi-analytic models of galaxy formation developed by Kauffmann,
White \& Guiderdoni to generate predictions for the observed properties of
cluster and group galaxies at redshifts between 0 and 0.6. We examine four sets
of cosmological initial conditions: low-density CDM models with and without
cosmological ... | 1994-09-28 | 2015-06-24 | [
"astro-ph"
] | Guinevere Kauffmann |
astro-ph/9409078 | Preliminary Results from the ESO Slice Project (ESP) | We present the first results of a galaxy redshift survey, ESO Slice Project
(ESP), we are accomplishing as an ESO Key-Project over about 30 square degrees
in a region near the South Galactic Pole. The limiting magnitude is b_J = 19.4.
Observations have been almost completed and about 90% of the data obtained so
far has... | 1994-09-28 | 2007-05-23 | [
"astro-ph"
] | G.Vettolani, E.Zucca, A.Cappi, R.Merighi, M.Mignoli, G.Stirpe,
G.Zamorani, H.MacGillivray, C.Collins, C.Balkowski, J.Alimi, A.Blanchard,
V.Cayatte, P.Felenbok, S.Maurogordato, D.Proust, G.Chincarini, L.Guzzo,
D.Maccagni, R.Scaramella, M.Ramella |
astro-ph/9409077 | Trends in Large Scale Structure Observations and the Likelihood of Early
Reionization | With the imminent promise of constraints on the epoch of reionization from
observations of microwave background anisotropies, the question of whether or
not the standard Cold Dark Matter (CDM) model permits early reionization has
been subjected to detailed investigation by various authors, with the
conclusion that reio... | 1994-09-28 | 2015-06-24 | [
"astro-ph"
] | Andrew R Liddle and David H Lyth |
astro-ph/9409074 | Mixed Cold-Hot Dark Matter Model with Falling and Quasi-Flat Initial
Perturbation Spectra | The mixed cold-hot dark matter cosmological model (CHDM) with
$\Omega_{tot}=1$ and a falling power-law initial spectrum of Gaussian adiabatic
perturbations ($n>1$) is tested using recent obserbational data. It is shown
that its fit to the data becomes worse with the growth of $n-1$, and may be
considered as unreasonabl... | 1994-09-28 | 2009-10-22 | [
"astro-ph"
] | Dmitri Pogosyan and Alexei Starobinsky |
astro-ph/9409079 | Dwarf Elliptical Galaxies | Dwarf elliptical (dE) galaxies, with blue absolute magnitudes typically
fainter than $M_B = -16$, are the most numerous type of galaxy in the nearby
universe. Tremendous advances have been made over the past several years in
delineating the properties of both Local Group satellite dE's and the large dE
populations of n... | 1994-09-28 | 2009-10-22 | [
"astro-ph"
] | Henry C. Ferguson and Bruno Binggeli |
astro-ph/9409080 | The Optical Gravitational Lensing Experiment. Deep Photometry of the
Sagittarius Dwarf Spheroidal Galaxy | We present deep CCD photometry of a field in the newly discovered dwarf
spheroidal galaxy in Sagittarius (hereafter Sgr), and of a nearby control
field. These data (totaling ~3.5 hrs exposure time in V and I) were used to
produce color-magnitude (CM) diagrams reaching I ~ 22.3 in both fields. After
statistically removi... | 1994-09-28 | 2009-10-22 | [
"astro-ph"
] | Mario Mateo, A. Udalski, M. Szymanski, J. Kaluzny, M. Kubiak, and W.
Krzeminski |
astro-ph/9409070 | Exponential Growth of Distance between Nearby Rays due to Multiple
Gravitational Scatterings | We give an estimate of the relative error in the angular measurement of
observations for high redshift objects induced by gravitational scatterings
(lensing). Gunn (1967) concluded that the gravitational scatterings by galaxies
induce the relative error of a few percent in the observations for objects at
$z=1$. This es... | 1994-09-27 | 2009-10-22 | [
"astro-ph"
] | Toshiyuki Fukushige and Junichiro Makino |
astro-ph/9409071 | The Contribution of Low Surface-Brightness Galaxies to Faint Galaxy
Counts | Low Surface-Brightness (LSB) galaxies are severely underrepresented in
surveys used to define the local luminosity function (LF), but could it in
principle be detected in deep surveys. To explore the possible contribution of
such objects to faint galaxy counts, we construct catalogs of simulated
non-evolving galaxies d... | 1994-09-27 | 2009-10-22 | [
"astro-ph"
] | Henry C. Ferguson and Stacy S. McGaugh |
astro-ph/9409067 | The contribution of AGNs to the X-ray background | We report the results of a detailed analysis of the contribution of various
classes of AGNs to the extragalactic X-ray background (XRB). The model is based
on the unification schemes of AGNs and on their related X-ray spectral
properties in the light of recent observational results. The integrated
emission from AGNs, w... | 1994-09-27 | 2011-05-23 | [
"astro-ph"
] | A. Comastri, G. Setti, G. Zamorani, G. Hasinger |
astro-ph/9409066 | The Very Red Halo of the cD Galaxy in A3284 | We present deep CCD surface photometry in the Gunn g, r, i system and
spectroscopy of the cD galaxy at the centre of the cluster A3284 at z = 0.15.
The brightness profile of the galaxy has been tracked up to 40 arcsec (142 kpc)
from the centre, and down to 26 mag/arcsec^2. The core and halo components in
the galaxy hav... | 1994-09-27 | 2007-05-23 | [
"astro-ph"
] | E. Molinari, A. Buzzoni, G. Chincarini (M.D. Pedrana Osservatorio
Astronomico di Brera) |
astro-ph/9409068 | The variable ROSAT X-ray spectrum of the BL Lac 0716+714 | The BL Lac object 0716+714 is a powerful flat spectrum radio source detected
by CGRO-EGRET at $\gamma$-ray energies. It has been observed for about 21000 s
over two days by the X-ray telescope onboard the ROSAT satellite and strong
flux and spectral variations have been detected. In the time scale of two days
the sourc... | 1994-09-27 | 2015-06-24 | [
"astro-ph"
] | M. Cappi, A. Comastri, S. Molendi, G.G.C. Palumbo, R. Della Ceca, T.
Maccacaro |
astro-ph/9409072 | An Infrared Cutoff Revealed by the Two Years of COBE-DMR Observations of
Cosmic Temperature Fluctuations | We show that a good fitting to the first two years of {\it COBE}-DMR
observations of the two-point angular correlation function of CBR temperature
is given by models with a non-zero infrared cutoff $k_{min}$ in the spectrum of
the primordial density perturbations. If this cutoff comes from the finiteness
of the univers... | 1994-09-27 | 2009-10-22 | [
"astro-ph"
] | Yi-Peng Jing and Li-Zhi Fang |
astro-ph/9409069 | The Effect of Gravitational Scattering on the Anisotropy of the Cosmic
Background Radiation | The homogeneity of the cosmic microwave background radiation (CBR) is one of
the most severe constraint for theories of the structure formation in the
universe. We investigated the effect of the gravitational scattering (lensing)
of galaxies, clusters of galaxies, and superclusters on the anisotropy of the
CBR by numer... | 1994-09-27 | 2009-10-22 | [
"astro-ph"
] | Toshiyuki Fukushige, Junichiro Makino, and Toshikazu Ebisuzaki |
astro-ph/9409064 | Non-Lte Effects on be and B Abundance Determinations in Cool Stars | We discuss the nature of non-LTE effects affecting abundance analysis of cool
stars. The departures from LTE of importance for the B I lines in solar-type
stars are described and some new results are presented. Boron abundances
derived under the LTE assumption have significant systematic errors, especially
for metal-po... | 1994-09-26 | 2007-05-23 | [
"astro-ph"
] | Dan Kiselman & Mats Carlsson |
astro-ph/9409065 | A New Macho Search Strategy | I propose a radical revision in the search strategy for Massive Compact
Objects (Machos) toward the Galactic bulge: monitor the entire $\sim 300$
square deg of the bulge and tune the search primarily to microlensing events of
bright $M_V\lsim 2$ stars. By employing a small second telescope to follow up
the events detec... | 1994-09-26 | 2009-10-22 | [
"astro-ph"
] | Andrew Gould |
astro-ph/9409063 | Cluster lens reconstruction using only observed local data | The reconstruction of the density profile in clusters of galaxies from the
distortion of the images of faint background galaxies is reconsidered. The
inversion formula of Kaiser \& Squires is known to provide a quantitative way
to perform this reconstruction; however, the practical application of this
formula faces two... | 1994-09-24 | 2007-05-23 | [
"astro-ph"
] | Peter Schneider |
astro-ph/9409059 | On the Mathematical Character of the Relativistic Transfer Moment
Equations | General--relativistic, frequency--dependent radiative transfer in spherical,
differentially--moving media is considered. In particular we investigate the
character of the differential operator defined by the first two moment
equations in the stationary case. We prove that the moment equations form a
hyperbolic system w... | 1994-09-23 | 2015-06-24 | [
"astro-ph"
] | R. Turolla, L. Zampieri and L. Nobili |
astro-ph/9409060 | The Homogeneous Bright Quasar Survey and the Quasar Evolution in the
Optical, X and Radio Bands | The present status of the ESO key-programme ``A Homogeneous Bright QSO
Survey'' is described together with the first results concerning the QSO counts
and the optical luminosity function. The related analysis of the evolution of
the radio and X-ray selected QSOs is presented. | 1994-09-23 | 2007-05-23 | [
"astro-ph"
] | S. Cristiani and F. La Franca |
astro-ph/9409061 | Galaxy Evolution from QSO Absorption--Selected Samples | We present results of surveys for high redshift field galaxies selected by
their having produced detectable absorption in the spectra of background QSOs.
Such surveys, in essence selected by gas cross-section rather than by flux
density, are almost completely independent of the conventional
magnitude--limited redshift ... | 1994-09-23 | 2007-05-23 | [
"astro-ph"
] | C. Steidel (MIT) and M. Dickinson (STScI) |
astro-ph/9409062 | Hierarchical correlations in models of galaxy clustering | We present a comparison of the predictions of perturbation theory for the
hierarchical J-order correlation amplitudes $S_J=\xibar_J/\xibar_2^{J-1}$,
$J=3-10$, with the results of large numerical simulations of gravitational
clustering. We consider two different initial power spectra of density
fluctuations, one being f... | 1994-09-23 | 2016-06-08 | [
"astro-ph"
] | E. Gaztanaga & C.M. Baugh |
astro-ph/9409055 | Hypersurface-Invariant Approach to Cosmological Perturbations | Using Hamilton-Jacobi theory, we develop a formalism for solving
semi-classical cosmological perturbations which does not require an explicit
choice of time-hypersurface. The Hamilton-Jacobi equation for gravity
interacting with matter (either a scalar or dust field) is solved by making an
Ansatz which includes all ter... | 1994-09-22 | 2010-11-01 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | D.S. Salopek and J.M. Stewart |
astro-ph/9409056 | Binary-Binary Interactions and the Formation of the PSR B1620-26 Triple
System in M4 | The hierarchical triple system containing the millisecond pulsar PSR B1620-26
in M4 is the first triple star system ever detected in a globular cluster. Such
systems should form in globular clusters as a result of dynamical interactions
between binaries. We propose that the triple system containing PSR B1620-26
formed ... | 1994-09-22 | 2009-10-22 | [
"astro-ph"
] | F. A. Rasio, S. McMillan, and P. Hut |
astro-ph/9409057 | Self-Lensing By Binaries | Lensing of one member of a binary by its companion is studied for several
classes of binaries. For binaries in which at least one member is an ordinary
(non-compact) star, the optical depths to lensing is extremely low, $\tau\lsim
v_\esc^4/c^4\sim 10^{-11}$. Here $v_\esc$ is the escape velocity from the
component with ... | 1994-09-22 | 2009-10-22 | [
"astro-ph"
] | Andrew Gould |
astro-ph/9409054 | The Evolution of the Optical Galaxy Luminosity Function - | The optical luminosity function is a fundamental characterization of the
galaxy population. A combination of earlier redshift surveys with two new
surveys allows the first accurate determination of the evolution of the
luminosity function with redshift, and reveals a marked steepening of the faint
end slope. This effec... | 1994-09-22 | 2007-05-23 | [
"astro-ph"
] | Matthew Colless |
astro-ph/9409053 | Observational constraints on the neutron star mass distribution | Radio observations of neutron star binary pulsar systems have constrained
strongly the masses of eight neutron stars. Assuming neutron star masses are
uniformly distributed between lower and upper bounds $m_l$ and $m_u$, the
observations determine with 95\% confidence that $1.01 < m_l/\text{M}_\odot <
1.34$ and $1.43 <... | 1994-09-22 | 2009-01-23 | [
"astro-ph",
"gr-qc"
] | L. S. Finn |
astro-ph/9409058 | Hydra: An Adaptive--Mesh Implementation of PPPM--SPH | We present an implementation of Smoothed Particle Hydrodynamics (SPH) in an
adaptive-mesh PPPM algorithm. The code evolves a mixture of purely
gravitational particles and gas particles. The code retains the desirable
properties of previous PPPM--SPH implementations; speed under light clustering,
naturally periodic boun... | 1994-09-22 | 2009-10-22 | [
"astro-ph"
] | H.M.P. Couchman, P.A. Thomas and F.R. Pearce |
astro-ph/9409052 | A Count Probability Cookbook: Spurious Effects and the Scaling Model | We study the errors brought by finite volume effects and dilution effects on
the practical determination of the count probability distribution function
P_N(n,L), which is the probability of having N objects in a cell of volume L^3
for a set of average number density n. Dilution effects are particularly
relevant to the ... | 1994-09-21 | 2009-10-22 | [
"astro-ph"
] | S. Colombi, F.R. Bouchet, R. Schaeffer |
astro-ph/9409051 | Natural Wormholes as Gravitational Lenses | Visser has suggested traversable 3-dimensional wormholes that could plausibly
form naturally during Big Bang inflation. A wormhole mouth embedded in high
mass density might accrete mass, giving the other mouth a net *negative* mass
of unusual gravitational properties. The lensing of such a gravitationally
negative anom... | 1994-09-20 | 2009-10-22 | [
"astro-ph",
"gr-qc"
] | John G. Cramer, Robert L. Forward, Michael S. Morris, Matt Visser,
Gregory Benford, and Geoffrey A. Landis |
astro-ph/9409050 | Chaos and Noise in Galactic Potentials | ABBREVIATED ABSTRACT: This paper summarises an investigation of the effects
of weak friction and noise in time-independent, nonintegrable potentials which
admit both regular and stochastic orbits. The aim is to understand the
qualitative effects of internal and external irregularities associated, e.g.,
with discretenes... | 1994-09-19 | 2009-10-22 | [
"astro-ph",
"chao-dyn",
"gr-qc",
"nlin.CD"
] | Salman Habib, Henry E. Kandrup, and M. Elaine Mahon |
astro-ph/9409049 | Reverberation by a Relativistic Accretion Disk | We calculate the response of a line emitted from a relativistic accretion
disk to a continuum variation of the central illuminating source. This model
might be relevant to the very broad and sometimes redshifted emission lines
which have been observed at optical and X-ray energies in Active Galactic
Nuclei and X-ray bi... | 1994-09-19 | 2015-06-24 | [
"astro-ph"
] | Sergio Campana and Luigi Stella (Osservatorio Astronomico di Brera,
Via Brera 28, 20121 Milano, Italy) |
astro-ph/9409048 | On the propagation of sound waves in a stellar wind traversed by
periodic strong shocks | It has been claimed that in stellar winds traversed by strong shocks the
mechanism for driving the wind by sound wave pressure cannot operate because
sound waves cannot propagate past the shocks. It is shown here that sound waves
can propagate through shocks in one direction and that this is a sufficient
condition for ... | 1994-09-19 | 2007-05-23 | [
"astro-ph"
] | F.P. Pijpers |
astro-ph/9409046 | Testing Cosmogonic Models with Gravitational Lensing | Gravitational lensing provides a strict test of cosmogonic models. Detailed
numerical propagation of light rays through a universe having a distribution of
inhomogeneities derived from the standard CDM (cold dark matter) scenario with
the aid of massive, fully nonlinear computer simulations is used to test the
model. I... | 1994-09-16 | 2010-12-13 | [
"astro-ph"
] | Joachim Wambsganss, Renyue Cen, Jeremiah P. Ostriker and Edwin L.
Turner |
astro-ph/9409047 | Association of Unidentified, Low Latitude EGRET Sources with Supernova
Remnants | We propose that some of the unidentified Galactic plane (-10 degrees < b < 10
degrees) sources listed in the first EGRET catalog (Fichtel et al. 1994) are
associated with nearby supernova remnants. The probability that the association
of strong EGRET sources with supernova remnants is due to chance alignment is
found t... | 1994-09-16 | 2007-05-23 | [
"astro-ph"
] | S. J. Sturner and C. D. Dermer |
astro-ph/9409044 | ROSAT Observations of the Flare Star CC Eri | The flare/spotted spectroscopic binary star CC Eri was observed with the
Position Sensitive Proportional Counter (PSPC) on the X-ray satellite ROSAT on
1990 July 9-11 and 1992 January 26-27. During the observations, the source was
variable on time scales from a few minutes to several hours, with the X-ray
(0.2-2 keV) l... | 1994-09-16 | 2015-06-24 | [
"astro-ph"
] | H. C. Pan and C. Jordan |
astro-ph/9409045 | A large amplitude flaring dMe star in the 1978 October 6B $\gamma$-ray
burst error box | Spectroscopic observations provide evidence that the optical transient object
observed in 1966 on archival plates of Sonneberg Observatory is a B=18.5 dMe
star. For an assumed flare duration of 40 min. (or longer) the flare amplitude
was $\bigtriangleup$m$_{B}$ $\approx$ 5.2 mag. If the recorded event was
belonging to ... | 1994-09-16 | 2009-10-22 | [
"astro-ph"
] | J. Greiner, C. Motch |
astro-ph/9409043 | Angular two-point correlation functions for cosmological gamma-ray burst
model | We compute the angular two-point correlation functions of the gamma-ray
bursts at cosmological distances. Since the gamma-ray burst emission mechanism
is not yet established, we simply assume that the gamma-ray burst sources are
associated with high-redshift galaxies in some way. Then on the basis of
several simple mod... | 1994-09-16 | 2009-10-22 | [
"astro-ph"
] | Shiho Kobayashi, Shin Sasaki, and Yasushi Suto |
astro-ph/9409040 | The Classification of M1-78 | The published properties of M1-78 are discussed with the purpose to resolve
the object's classification as either a planetary nebula or an ultracompact HII
region. A classification as a planetary nebula is rejected primarily because of
the high luminosity of the object, but because of the chemical composition and
expan... | 1994-09-15 | 2021-10-13 | [
"astro-ph"
] | G. T. Gussie |
astro-ph/9409042 | Velocity Correlations of Galaxy Clusters | We determine the velocity correlation function, pairwise peculiar velocity
difference, and root-mean-square pairwise peculiar velocity dispersion of rich
clusters of galaxies, as a function of pair separation, for three cosmological
models: Omega=1 and Omega=0.3 CDM, and Omega=0.3 PBI models (all flat and
COBE-normaliz... | 1994-09-15 | 2009-10-22 | [
"astro-ph"
] | Renyue Cen, Neta A. Bahcall and Mirt Gramann (Princeton University
Observatory, Princeton, NJ) |
astro-ph/9409041 | High frequency oscillations of Newton's constant induced by inflation | We examine the possibility that an epoch of inflationary expansion induces
high-frequency oscillations of Newton's constant, $G$. The effect occurs
because inflation can shift the expectation value of a non-minimally coupled,
Brans-Dicke-like field away from the minimum of its effective potential. At
some time after in... | 1994-09-15 | 2009-09-25 | [
"astro-ph",
"gr-qc"
] | Clifford M. Will and Paul J. Steinhardt |
astro-ph/9409034 | Gravitational Microlensing Results from Macho | We provide a status report on our search for dark matter in our Galaxy in the
form of massive compact halo objects (MACHOs), using gravitational microlensing
of background stars. This search uses a very large CCD camera on the dedicated
1.27m telescope at Mt.~Stromlo, Australia, and has been taking data for 2
years. At... | 1994-09-14 | 2009-10-22 | [
"astro-ph"
] | W. Sutherland, C. Alcock, R. Allsman, T. Axelrod, D. Bennett, S. Chan,
K. Cook, K. Freeman, K. Griest, S. Marshall, S. Perlmutter, B. Peterson, M.
Pratt, P. Quinn, A. Rodgers, C. Stubbs |
astro-ph/9409037 | HST Observations of the Distant Cluster 0016+16: Quantitative Morphology
of Confirmed Cluster Members | We present HST images of 24 confirmed members of the distant galaxy cluster
Cl0016+16 at redshift 0.55. The Balmer-strong (``E+A'') and emission- line
galaxies frequently show unusual visual morphology, implying that galaxian
interactions produce ``active'' galaxies in moderate-redshift clusters. We use
the image conce... | 1994-09-14 | 2009-10-22 | [
"astro-ph"
] | Gregory D. Wirth, David C. Koo, and Richard G. Kron |
astro-ph/9409035 | Emission Line Profiles from Self-Gravitating Thin Disks | We have constructed general relativistic models of a stationary, axially
symmnetric, Keplerian thin disk around a rotating black hole. We computed
profiles of a spectral line, emitted in the inner region of the disk. In our
models we have taken into account also the self-gravity of the disk. The aim of
this work is to ... | 1994-09-14 | 2009-10-22 | [
"astro-ph"
] | V. Karas, A. Lanza, and D. Vokrouhlicky |
astro-ph/9409038 | Real-space cosmic fields from redshift-space distributions: a Green
function approach | We present a new method for reconstructing the cosmological density, peculiar
velocity and peculiar gravitational potential on large scales from redshift
data. We remove the distorting effects of line-of-sight peculiar motions by
using the linear theory of gravitational instability, in which the potential is
the soluti... | 1994-09-14 | 2009-10-07 | [
"astro-ph"
] | Max Tegmark, Benjamin Bromley |
astro-ph/9409039 | Phase-Transition Theory of Instabilities.I.Second-Harmonic Instability
and Bifurcation Points | A free-energy minimization approach is used to address the secular &
dynamical instabilities & the bifurcations along sequences of rotating,
self-gravitating fluid and stellar systems. Our approach stems from the
Landau-Ginzburg theory of phase transitions. We focus on the Maclaurin sequence
of oblate spheroids & on th... | 1994-09-14 | 2009-10-22 | [
"astro-ph"
] | D.M. Christodoulou, D. Kazanas, I. Shlosman & J.E. Tohline |
astro-ph/9409036 | The Mass Spectrum Of Machos From Parallax Measurements | We demonstrate that by making satellite-based parallax measurements of Macho
events, it is possible to distinguish disk from bulge Machos and to determine
individual masses of disk Machos to an accuracy of $0.2$ in the log. This is at
least a 3-fold improvement over what can be done without parallaxes, i.e., just
from ... | 1994-09-14 | 2009-10-22 | [
"astro-ph"
] | Cheongho Han and Andrew Gould |
astro-ph/9409031 | Optimizing Observing Patterns in Cosmic Microwave Background Radiation
Anisotropy Experiments | We consider several factors concerning the design of observing strategies in
Cosmic Microwave Background (CMB) anisotropy experiments. First we consider the
number of independent points on the sky one should observe given a fixed
observing time. Given an assumed level of sky temperature fluctuations,
$\sigma_{sky}$ and... | 1994-09-13 | 2007-05-23 | [
"astro-ph"
] | R.K. Schaefer and L. Piccirillo |
astro-ph/9409032 | The Gravitational Potential of the Bar in NGC 4314 | We present near-infrared images of NGC 4314 in the $J$,$H$, and $K$ bands.
Colors in these bands are constant across the bar of NGC 4314 indicating that
the mass-to-light ratio is constant over much of the galaxy. We have developed
an efficient procedure for mapping the gravitational potential of a
non-axisymmetric gal... | 1994-09-13 | 2009-10-22 | [
"astro-ph"
] | A.C. Quillen, Jay. A. Frogel and Rosa A. Gonz'alez |
astro-ph/9409027 | A Spherical Harmonic Analysis of Redshift Space | We re-examine the effects of redshift space distortion in all-sky galaxy
redshift surveys in the formalism of spherical harmonics. Within this framework
we show how one can treat both the large-scale linear effects, and the
small-scale nonlinear clustering, exactly to first order. The method also
allows in principle a ... | 1994-09-13 | 2015-06-24 | [
"astro-ph"
] | A.F. Heavens and A.N. Taylor |
astro-ph/9409033 | An Estimate of the Gas Inflow Rate Along the Bar in NGC 7479 | We present images of the barred galaxy NGC 7479 in the optical and near
infrared broad--bands $B,V,R,J,H,K$, and images in H$\alpha$+[N II] and
CO(J=1$\rightarrow$0) emission. The H$\alpha$ and CO emission in the bar are
coincident and confined to narrow linear features that are offset from the
center of the bar as obs... | 1994-09-13 | 2009-10-22 | [
"astro-ph"
] | A.C. Quillen, Jay. A. Frogel, Jeffrey D. P. Kenney, R. W. Pogge, and
D. L. DePoy |
astro-ph/9409030 | Moments of the Cluster Distribution as a Test of Dark Matter Models | We estimate the variance and the skewness of the cluster distribution in
several dark matter (DM) models. The cluster simulations are based on the
Zel'dovich approximation, the low computational cost of which allows us to run
50 random realizations of each model. We compare our results with those coming
from a similar ... | 1994-09-13 | 2009-10-22 | [
"astro-ph"
] | M.Plionis, S.Borgani, L.Moscardini, P.Coles |
astro-ph/9409026 | Implications on the Ionizing Background Radiation from HST Heii
Gunn-Peterson Test | Recently, Jakobsen et al. reported that the HeII Gunn-Peterson optical depth
is greater than 1.7 at $ z=3.3$. When we consider this observation combined
with the HI Gunn-Peterson optical depths and the intensity of the UV background
at high redshifts, we can put constraints on the spectrum of the UV background
and the ... | 1994-09-13 | 2008-02-03 | [
"astro-ph"
] | Shin Sasaki and Fumio Takahara |
astro-ph/9409029 | A cosmological test with compact radio sources | The recent proposal by Kellermann (1993) to use the angular size/redshift
relation of compact radio sources to obtain information on the value of
cosmological parameters has provoked considerable discussion in the
astronomical community. I present here a careful re-analysis of the angular
size/redshift data of radio je... | 1994-09-13 | 2011-05-23 | [
"astro-ph"
] | R.Kayser |
astro-ph/9409028 | HST Images of Nearby Luminous Quasars | Strong upper limits are placed on the visual-band brightnesses of galactic
hosts for four luminous, radio-quiet quasars with redshifts between $0.16$
and~$0.24$ that were studied with the HST's Wide Field/Planetary Camera-2.
Typical upper limits on the luminosities of galactic hosts are about $1.4$ mag
fainter than $L^... | 1994-09-13 | 2009-10-22 | [
"astro-ph"
] | John N. Bahcall, Sofia Kirhakos, and Donald P. Schneider |
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