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 |
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astro-ph/9403025 | Polarization Profiles of Scattered Emission Lines. I. General Formalism
for Optically Thin Rayleigh Scattering | A general theoretical framework is developed for interpreting
spectropolarimetric observations of optically thin emission line scattering
from small dust particles. Spatially integrated and spatially resolved line
profiles of both scattered intensity and polarization are calculated
analytically from a variety of simple... | 1994-03-11 | 2009-10-22 | [
"astro-ph"
] | W. J. Henney |
astro-ph/9403022 | Microlensing by Stars in the Disk of M31 | The optical depth to microlensing toward M31 due to known stars in the disk
of M31 itself is $\tau\sim 2\times 10^{-7}e^{-r/d}$ where $d$ is the disk scale
length and $r$ is the distance along the major axis. Thus, there can be
significant lensing toward the M31 disk even if M31 contains no dark compact
objects. The op... | 1994-03-11 | 2009-10-22 | [
"astro-ph"
] | Andrew Gould |
astro-ph/9403026 | Polarization Profiles of Scattered Emission Lines. II. Upstream Dust
Scattering in the HH 1 Jet | Detailed comparisons are made between observations of scattered light
upstream of the head of the HH~1 jet and predictions of simple scattering
models. It is shown that, in order to unambiguously determine the velocity of
the head of the jet (bow shock) with respect to the upstream dust, existing
spectroscopic observat... | 1994-03-11 | 2009-10-22 | [
"astro-ph"
] | W. J. Henney, A. C. Raga and D. J. Axon |
astro-ph/9403016 | Lagrangian Evolution of the Weyl Tensor | We derive the evolution equations for the electric and magnetic parts of the
Weyl tensor for cold dust from both general relativity and Newtonian gravity.
In a locally inertial frame at rest in the fluid frame, the Newtonian equations
agree with those of general relativity. We give explicit expressions for the
electric... | 1994-03-10 | 2009-10-22 | [
"astro-ph",
"gr-qc"
] | Edmund Bertschinger and A.J.S. Hamilton |
astro-ph/9403019 | The Parker instability in disks with differential rotation | We present a detailed study of the growth of the Parker instability in a
differentially rotating disk embedded in an azimuthal equilibrium magnetic
field, such as the interstellar gas or an accretion disk. Basic properties of
the instability without shear are first recalled. Differential rotation is
modeled in the shea... | 1994-03-10 | 2007-05-23 | [
"astro-ph"
] | T. Foglizzo and M.Tagger |
astro-ph/9403021 | Correlated Errors in the COBE DMR Sky Maps | The {\it COBE} DMR sky maps contain low-level correlated noise. We obtain
estimates of the amplitude and pattern of the correlated noise from three
techniques: angular averages of the covariance matrix, Monte Carlo simulations
of two-point correlation functions, and direct analysis of the DMR maps. The
results from the... | 1994-03-10 | 2009-10-22 | [
"astro-ph"
] | C. H. Lineweaver, G. F. Smoot, C. L. Bennett, E. L. Wright, L.
Tenorio, A. Kogut, P. B. Keegstra, G. Hinshaw, A. J. Banday |
astro-ph/9403020 | The Effects of Smoothing on the Statistical Properties of the
Large-Scale Cosmic Fileds | It has been shown that the large--scale correlation functions of the density
field (and velocity divergence field) follow a specific hierarchy in the
quasilinear regime and for Gaussian initial conditions (Bernardeau 1992). The
exact relationships between the cumulants of the probability distribution
functions (the so-... | 1994-03-10 | 2007-05-23 | [
"astro-ph"
] | F. Bernardeau |
astro-ph/9403018 | Axion String Constraints | We study the production of cosmological axions in the standard scenario in
which a global string network forms at the Peccei-Quinn phase transition. We
make detailed calculations of the axions produced by string loops (a previously
overlooked source), comparing these with estimates of other contributions from
long stri... | 1994-03-10 | 2009-10-22 | [
"astro-ph",
"hep-ph"
] | R.A.Battye and E.P.S.Shellard (DAMTP Cambridge) |
astro-ph/9403017 | On the spin parameter of dark-matter haloes | The study by White (1984) on the growth of angular momentum in dark haloes is
extended towards a more detailed investigation of the spin parameter
$\lambda\equiv L\sqrt{E}/{G M^{2.5}}$. Starting from the Zel'dovich
approximation to structure formation, a dark halo is approximated by a
homogeneous ellipsoid with the ine... | 1994-03-10 | 2015-06-24 | [
"astro-ph"
] | Matthias Steinmetz and Matthias Bartelmann |
astro-ph/9403014 | The Near-IR-Optical-UV Emission of BL Lacertae Objects | Near--infrared, optical and ultraviolet quasi--simultaneous observations of
11 BL Lacertae objects are reported. For all but one source the dereddened
spectral flux distribution in the $8\cdot10^{13}-2\cdot10^{15}$ Hz frequency
range can be described by a single power law f$_\nu \propto \nu^{-\alpha}$ with
average spec... | 1994-03-08 | 2009-10-22 | [
"astro-ph"
] | E. Pian, R. Falomo, R. Scarpa & A. Treves |
astro-ph/9403015 | Amplitudes of Stellar Oscillations: The Implications for
Asteroseismology | There are no good predictions for the amplitudes expected from solar-like
oscillations in other stars. In the absence of a definitive model for
convection, which is thought to be the mechanism that excites these
oscillations, the amplitudes for both velocity and luminosity measurements must
be estimated by scaling from... | 1994-03-08 | 2011-05-05 | [
"astro-ph"
] | H. Kjeldsen and T.R. Bedding |
astro-ph/9403009 | On the Formation of Elliptical Galaxies | It is shown that the violent relaxation of dissipationless stellar systems
leads to universal de Vaucouleurs profiles only outside 1.5 effective radii
$R_e$. Inside $1.5 R_e$ the surface density profiles depend strongly on the
initial conditions and are in general not in agreement with the de Vaucouleurs
law. This resu... | 1994-03-07 | 2007-05-23 | [
"astro-ph"
] | Andi Burkert |
astro-ph/9403011 | Large-amplitude isothermal fluctuations and high-density dark-matter
clumps | Large-amplitude isothermal fluctuations in the dark matter energy density,
parameterized by $\Phi\equiv\delta\rhodm/\rhodm$, are studied within the
framework of a spherical collapse model. For $\Phi \ga 1$, a fluctuation
collapses in the radiation-dominated epoch and produces a dense dark-matter
object. The final densi... | 1994-03-07 | 2009-10-22 | [
"astro-ph"
] | Edward W. Kolb and Igor I. Tkachev |
astro-ph/9403013 | Magnification Bias in Galactic Microlensing Searches | It is shown that a significant amount of detectable gravitational
microlensing events that could potentially be found by MAssively Parallel
Photometry (MAPP) projects (such as the MACHO, EROS and OGLE collaborations)
will occur for stars too dim to be easily noticed individually by these
projects. This is the result of... | 1994-03-07 | 2009-10-22 | [
"astro-ph"
] | Robert J. Nemiroff (George Mason University and NASA Goddard Space
Flight Center) |
astro-ph/9403012 | Abundance of moderate-redshift clusters in the Cold + Hot dark matter
model | Using a set of $\pppm$ simulation which accurately treats the density
evolution of two components of dark matter, we study the evolution of clusters
in the Cold + Hot dark matter (CHDM) model. The mass function, the velocity
dispersion function and the temperature function of clusters are calculated for
four different ... | 1994-03-07 | 2009-10-22 | [
"astro-ph"
] | Y.P. Jing and L.Z. Fang |
astro-ph/9403010 | Is there any Scaling in the Cluster Distribution ? | We apply fractal analysis methods to investigate the scaling properties in
the Abell and ACO catalogs of rich galaxy clusters. We also discuss different
technical aspects of the method when applied to data sets with small number of
points as the cluster catalogs. Results are compared with simulations based on
the Zel'd... | 1994-03-07 | 2009-10-22 | [
"astro-ph"
] | S.Borgani, V.J. Martinez, M.A.Perez, R.Valdarnini |
astro-ph/9403008 | Diffuse Molecular Clouds and the Molecular Interstellar Medium from 13CO
Observations of M33 | We have obtained 12CO and 13CO J=1-0 observations of the nearby spiral galaxy
M33 to try to resolve the long-standing discrepancy between 12CO/13CO line
ratios measured in Galactic giant molecular clouds and external galaxies.
Interferometer maps of the molecular cloud MC20 give a 12CO/13CO line ratio of
7.5+/-2.1, whi... | 1994-03-04 | 2009-10-22 | [
"astro-ph"
] | C. D. Wilson and C. E. Walker |
astro-ph/9403006 | Numerical Methods in Cosmological Global Texture Simulations | Numerical simulations of the evolution of a global topological defect field
have two characteristic length scales --- one macrophysical, of order the field
correlation length, and the other microphysical, of order the field width. The
situation currently of most interest to particle cosmologists involves the
behaviour ... | 1994-03-03 | 2010-11-01 | [
"astro-ph"
] | Julian Borrill |
astro-ph/9403007 | Particle Physics and Cosmology | Lectures presented at the 42nd Scottish Universities Summer School in
Physics, St. Andrews, Scotland, August 1993. | 1994-03-03 | 2007-05-23 | [
"astro-ph"
] | Edward W. Kolb |
astro-ph/9403004 | Testing Inflation with the Cosmic Microwave Background | Cosmic microwave background (CMB) anisotropy may result from both scalar and
tensor perturbations. For a sufficiently narrow range of angular scales, CMB
perturbations can be characterized by four parameters. Results from the Cosmic
Background Explorer fix one combination of the parameters, reducing the
parameters to t... | 1994-03-02 | 2009-10-22 | [
"astro-ph"
] | Scott Dodelson, Lloyd Knox, and Edward W. Kolb |
astro-ph/9403005 | Texture-Induced Microwave Background Anisotropies | We use numerical simulations to calculate the cosmic microwave background
anisotropy induced by the evolution of a global texture field, with special
emphasis on individual textures. Both spherically symmetric and general
configurations are analysed, and in the latter case we consider field
configurations which exhibit... | 1994-03-02 | 2009-10-22 | [
"astro-ph"
] | Julian Borrill, Edmund J Copeland, Andrew R Liddle, Albert Stebbins
and Shoba Veeraraghavan |
astro-ph/9403001 | Relating Spectral Indices to Tensor and Scalar Amplitudes in Inflation | Within an expansion in slow-roll inflation parameters, we derive the complete
second-order expressions relating the ratio of tensor to scalar density
perturbations and the spectral index of the scalar spectrum. We find that
``corrections'' to previously derived formulae can dominate if the tensor to
scalar ratio is sma... | 1994-03-01 | 2009-10-22 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | Edward W. Kolb and Sharon L. Vadas |
astro-ph/9403003 | X-Ray and Optical Properties of Groups of Galaxies | We examine the relationship between the group x-ray luminosity in the 0.3-3.5
keV band and the measured velocity dispersion, and galaxy surface number
density. We find definite correlations. Richer groups follow the same relation
as rich clusters (cf. Quintana & Melnick 1982) with $L_x \propto \sigma^{4.0\pm
0.6}$, but... | 1994-03-01 | 2009-10-22 | [
"astro-ph"
] | I.P. Dell'Antonio, M.J. Geller, and D.G. Fabricant |
astro-ph/9403002 | Boron in the Extreme Pop II Star HD 140283 and the Production of Light
Elements in the Early Galaxy | Using observations of the 2496.7 A B I line with the HST GHRS at a nominal
resolution of 90,000, we have found the abundance of boron of HD 140283 to be
log epsilon_B (= 12 + log (N_B/N_H)) = 0.34 \pm 0.20. This result is found when
a significant non-LTE effect in the formation of the B I line is taken into
account. Th... | 1994-03-01 | 2007-05-23 | [
"astro-ph"
] | B. Edvardsson, B. Gustafsson, S.G. Johansson, D. Kiselman, D.L.
Lambert, P.E. Nissen, G. Gilmore |
astro-ph/9402071 | A ``Skewed'' lognormal approximation to the probability distribution
function of the large-scale density field | I propose a method to fit the probability distribution function (hereafter
PDF) of the large scale density field rho, motivated by a Lagrangian version of
the continuity equation. It consists in applying the Edgeworth expansion to the
quantity Phi=log rho - < log rho >. The method is tested on the matter particle
distr... | 1994-02-28 | 2009-10-22 | [
"astro-ph"
] | S. Colombi |
astro-ph/9402070 | Simulating Self-gravitating Hydrodynamic Flows | An efficient algorithm for solving Poisson's equation in two and three
spatial dimensions is discussed. The algorithm, which is described in detail,
is based on the integral form of Poisson's equation and utilizes spherical
coordinates and an expansion into spherical harmonics. The solver can be
applied to and works we... | 1994-02-28 | 2009-10-22 | [
"astro-ph"
] | Ewald Mueller & Matthias Steinmetz |
astro-ph/9402069 | Merger rates in hierarchical models of galaxy formation. II: Comparison
with N-body simulations | We have made a detailed comparison of the results of large N-body simulations
with the analytical description of the merging histories of dark matter halos
presented in Lacey & Cole 1993, which is based on an extension of the Press-
Schechter method (Bond etal 1991,Bower 1991). We find the analytical
predictions for th... | 1994-02-28 | 2015-06-24 | [
"astro-ph"
] | Cedric Lacey and Shaun Cole |
astro-ph/9402068 | Ohm's Law for a Relativistic Pair Plasma | We derive the fully relativistic Ohm's law for an electron-positron plasma.
The absence of non-resistive terms in Ohm's law and the natural substitution of
the 4-velocity for the velocity flux in the relativistic bulk plasma equations
do not require the field gradient length scale to be much larger than the
lepton iner... | 1994-02-27 | 2009-10-22 | [
"astro-ph"
] | Eric G. Blackman and George B. Field (Harvard Univ.) |
astro-ph/9402065 | Non-Linear Approximations to Gravitational Instability: A Comparison in
the Quasi-Linear Regime | We compare different nonlinear approximations to gravitational clustering in
the weakly nonlinear regime, using as a comparative statistic the evolution of
non-Gaussianity which can be characterised by a set of numbers $S_p$ describing
connected moments of the density field at the lowest order in $<\delta^2>$:
$<\delta... | 1994-02-25 | 2009-10-22 | [
"astro-ph"
] | Dipak Munshi, Varun Sahni and Alexei A. Starobinsky |
astro-ph/9402062 | Smoothed Particle Interpolation | Smoothed particle hydrodynamics (SPH) discretization techniques are
generalized to develop a method, smoothed particle interpolation (SPI), for
solving initial value problems of systems of non-hydrodynamical nature. Under
this approach, SPH is viewed as strictly an interpolation scheme and, as such,
suitable for solvin... | 1994-02-25 | 2009-10-22 | [
"astro-ph"
] | Pablo Laguna (Penn State Univ.) |
astro-ph/9402063 | Evolution of Galaxies in Clusters | We use new models of stellar population synthesis to estimate the fraction of
stars formed during the last major bursts of star formation in E/S0 galaxies in
low-redshift clusters ($z\simlt0.4$) from the spectral signatures of
intermediate-age stars. We find that the mass fraction of stars formed in late
bursts in earl... | 1994-02-25 | 2009-10-22 | [
"astro-ph"
] | S. Charlot and J. Silk |
astro-ph/9402066 | Collapse of Axionic Domain Wall and Axion Emission | We examine the collapse of an axion domain wall bounded by an axionic string.
It is found that the collapse proceeds quickly and axion domain walls
disappear. However axions are emitted in the collapse and its energy density
increases during radiation dominated era and contributes significantly to the
present mass dens... | 1994-02-25 | 2009-10-22 | [
"astro-ph"
] | Michiyasu Nagasawa and Masahiro Kawasaki |
astro-ph/9402061 | Short time scale monitoring of SiO sources | We present the results of a short time scale monitoring of SiO maser emission
(v=1 J=1-0 transition) in four known strong sources. These sources were
monitored nightly for a period of about a month. The aim of these observations
is to investigate the possible presence of variations in the maser lines on
time scales of ... | 1994-02-24 | 2007-05-23 | [
"astro-ph"
] | F.P. Pijpers, J.R.Pardo, V. Bujarrabal |
astro-ph/9402059 | Non-Gaussian statistics of pencil beam surveys | We study the effect of the non-Gaussian clustering of galaxies on the
statistics of pencil beam surveys. We find that the higher order moments of the
galaxy distribution play an important role in the probability distribution for
the power spectrum peaks. Taking into account the observed values for the
kurtosis of galax... | 1994-02-24 | 2009-10-22 | [
"astro-ph"
] | Luca Amendola |
astro-ph/9402067 | Lick Optical Spectra of Quasar HS 1946+7658 at 10 km/sec Resolution:
Lyman-Alpha Forest and Metal Absorption Systems | We present optical spectra of QSO HS~1946+7658 with either high resolution
(FWHM=10 km/s) or high signal to noise ratio (SNR=40-100). We find 113 Lyman
alpha and six metal line systems. The metal systems at Zabs=2.844 and 3.050
have complex velocity structures. We find that the system at 2.844 is a damped
Ly-a absorpti... | 1994-02-24 | 2010-12-16 | [
"astro-ph"
] | X.-M. Fan and D. Tytler |
astro-ph/9402060 | Microwave Background Fluctuations in an Open Universe | ( to appear in: Proceedings of the Nishonomiya Yukawa Memorial Symposium
Edited by M. Sasaki) There are several models for generating fluctuations in an
open universe that are compatible with the microwave background fluctuations
detected by COBE {\it and} observations of large scale structure. Topological
defects, suc... | 1994-02-24 | 2009-09-25 | [
"astro-ph",
"hep-ph"
] | David N. Spergel, Ue-Li Pen, Marc Kamionkowski, Naoshi Sugiyama |
astro-ph/9402064 | Fabry-Perot Measurements of the Dynamics of Globular Cluster Cores: M15
(NGC~7078) | We report the first use of the Rutgers Imaging Fabry-Perot Spectrophotometer
to study the dynamics of the cores of globular clusters. We have obtained
velocities for cluster stars by tuning the Fabry-Perot to take a series of
narrow-band images at different wavelengths across one of the Na D (5890 AA)
absorption lines.... | 1994-02-24 | 2009-10-22 | [
"astro-ph"
] | K. Gebhardt, C. Pryor, T.B. Williams, and J.E. Hesser |
astro-ph/9402057 | Comparison of Dynamical Approximation Schemes for Non-Linear
Gravitational Clustering | I report on controlled comparison of gravitational approximation schemes
linear/lognormal/adhesion/frozen-flow/Zel'dovich(ZA) and ZA's second--order
generalization. In the last two cases we also created new versions of the
approximation by truncation, i.e., by finding an optimum smoothing window (see
text) for the init... | 1994-02-23 | 2009-10-22 | [
"astro-ph"
] | Adrian L. Melott |
astro-ph/9402058 | Substructure in Clusters and Central Galaxy Peculiar Velocities | Formation theories for central dominant galaxies in clusters require them to
be located at the minimum of the cluster gravitational potential. However, 32\%
(8 out of 25) of the clusters with more than 50 measured redshifts have central
galaxies with significant velocity offsets (with respect to other cluster
members).... | 1994-02-23 | 2009-10-22 | [
"astro-ph"
] | Christina M. Bird |
astro-ph/9402056 | A search for symbiotic behaviour amongst OH/IR colour mimics | Recent maser surveys have shown that many potential OH/IR stars have no OH
masers in their circumstellar envelopes, despite the modest requirements which
should be implicitly met by IRAS colour-selected candidates. It has been
suggested that these OH/IR colour mimics must have a degenerate companion which
dissociates O... | 1994-02-22 | 2015-06-24 | [
"astro-ph"
] | E. R. Seaquist and R. J. Ivison |
astro-ph/9402055 | Discovery of hydroxyl and water masers in R Aquarii and H1-36 Arae | We present the first results from an all-sky maser-line survey of symbiotic
Miras. Interferometric spectral-line observations of R Aqr and H1-36 Arae have
revealed a 22-GHz water maser in the former and 1612-MHz hydroxyl and weak
22-GHz water maser emission from the latter. H1-36 has thus become the first
known symbiot... | 1994-02-22 | 2015-06-24 | [
"astro-ph"
] | R. J. Ivison, E. R. Seaquist and P. J. Hall |
astro-ph/9402054 | Evidence for Hco+ Infall toward T Tauri? | High spectral and spatial resolution observations of the HCO+ molecule toward
the T Tau binary system obtained with the Owens Valley Millimeter Array reveal
a broad emission line profile (V_LSR = 7.2 km/s, width = 2.0 km/s) upon which a
narrow, redshifted absorption feature (V_LSR = 8.5 km/s, width +/- 0.5 km/s) is
sup... | 1994-02-22 | 2009-10-22 | [
"astro-ph"
] | Huib Jan van Langevelde, Ewine F. van Dishoeck, Geoffrey A. Blake |
astro-ph/9402048 | Gravitational Lensing of Distant Field Galaxies by Rich Clusters: I. --
Faint Galaxy Redshift Distributions | {}From deep optical images of three clusters selected by virtue of their
X-ray luminosity and/or optical richness (1455+22; $z=0.26$, 0016+16; $z=0.55$
and 1603+43; $z=0.89$), we construct statistically-complete samples of faint
field galaxies ($I \leq 25$) suitable for probing the effects of gravitational
lensing. By ... | 1994-02-21 | 2015-06-24 | [
"astro-ph"
] | Ian Smail, Richard S. Ellis & Michael J. Fitchett |
astro-ph/9402052 | Typical Scales in the Spatial Distribution of QSOs | We present results of searching for the possible typical scales in the
spatial distribution of QSOs. Our method is based on the second derivative of
the two-point correlation function. This statistic is sensitive to the scale of
the maximum in the spectrum $P(k)$ of the density perturbation in the universe.
This maximu... | 1994-02-21 | 2009-10-22 | [
"astro-ph"
] | Zugan Deng, Xiaoyang Xia and Li-Zhi Fang |
astro-ph/9402051 | Spherical Accretion onto Neutron Stars Revisited: Are Hot Solutions
Possible ? | Stationary, spherical accretion onto an unmagnetized neutron star is here
reconsidered on the wake of the seminal paper by Zel'dovich \& Shakura (1969).
It is found that new ``hot'' solutions may exist for a wide range of
luminosities. These solutions are characterized by a high temperature,
$10^{9}\div 10^{11}$ K, and... | 1994-02-21 | 2009-10-22 | [
"astro-ph"
] | Roberto Turolla, Luca Zampieri, Monica Colpi and Aldo Treves |
astro-ph/9402053 | Noise Correlation in Cosmic Microwave Background Experiments | Many analyses of microwave background experiments neglect the correlation of
noise in different frequency or polarization channels. We show that these
correlations, should they be present, can lead to severe misinterpretation of
an experiment. In particular, correlated noise arising from either electronics
or atmospher... | 1994-02-21 | 2009-10-22 | [
"astro-ph"
] | Scott Dodelson (Fermilab), Arthur Kosowsky (Chicago) and Steven T.
Myers (Caltech) |
astro-ph/9402049 | Gravitational Lensing of Distant Field Galaxies by Rich Clusters: II. --
Cluster Mass Distributions | Using a non-parametric procedure developed by Kaiser \& Squires (1993), we
analyse the statistical image distortions of faint field galaxies to $I\ls25.5$
in two distant X-ray luminous clusters 1455+22 ($z_{cl}=0.26$) and 0016+16
($z_{cl}=0.55$) to derive two dimensional projected mass distributions for the
clusters. T... | 1994-02-21 | 2015-06-24 | [
"astro-ph"
] | Ian Smail, Richard S. Ellis, Michael J. Fitchett & Alastair C. Edge |
astro-ph/9402050 | The Formation of Galaxies: A Challenge for Supercomputers -- a Simple
Task for GRAPE ? | We present numerical simulations of galaxy formation, one of the most
challenging problems in computational astrophysics. The key point in such
simulations is the efficient solution of the N--body problem. If the gas of a
galaxy is treated by means of smoothed particle hydrodynamics (SPH), the
hydrodynamic equations ca... | 1994-02-21 | 2007-05-23 | [
"astro-ph"
] | Matthias Steinmetz |
astro-ph/9402047 | Is the High-Energy Emission from Centaurus A Compton-Scattered Jet
Radiation? | We consider whether the hard X-ray and soft gamma-ray emission from Centaurus
A is beamed radiation from the active nucleus which is Compton-scattered into
our line-of-sight. We derive the spectrum and degree of polarization of
scattered radiation when incident beamed radiation is scattered from a cold
($kT<<m_ec^2$) e... | 1994-02-18 | 2009-10-22 | [
"astro-ph"
] | J. G. Skibo, C. D. Dermer and R. L. Kinzer |
astro-ph/9402046 | Are Analogues of Hot Subdwarf Stars Responsible for the UVX Phenomenon
in Galaxy Nuclei? | We present the case that populations of sdB/sdOB/sdO-type stars may be a
common constituent of galactic stellar populations, responsible for the UV
upturn (`UVX') observed in the spectra of spiral bulges and normal galaxy
nuclei. Extreme Horizontal Branch stars with $\log g > 5$ and $\log \teff >
20,000K$ have emerged ... | 1994-02-18 | 2007-05-23 | [
"astro-ph"
] | Ben Dorman, R.W. O'Connell, & R.T. Rood (Astronomy Dept, University of
Virginia.) |
astro-ph/9402044 | Topological Defects in an Open Universe | (To appear in Nuclear Physics B Supplements Proceedings section) This talk
will explore the evolution of topological defects in an open universe. The
rapid expansion of the universe in an open model slows defects and suppresses
the generation of CBR fluctuations at large angular scale as does the altered
relationship b... | 1994-02-17 | 2009-10-22 | [
"astro-ph"
] | David N. Spergel and Ue-Li Pen |
astro-ph/9402045 | Power Spectrum Constraints from Spectral Distortions in the Cosmic
Microwave Background | %The content of this replacement paper is identical to the original. %We have
attempted to fix the postscript so that it will print out on %a larger number
of printers. Using recent experimental limits on $\mu$ distortions from COBE
FIRAS, and the large lever-arm spanning the damping of sub-Jeans scale
fluctuations to ... | 1994-02-17 | 2009-10-22 | [
"astro-ph"
] | Wayne Hu, Douglas Scott, & Joseph Silk |
astro-ph/9402039 | A General Class of Self-similar Self-gravitating Fluids | (accepted for publication in the Ap.J.) I present a general classification of
self-similar solutions to the equations of gravitational hydrodynamics that
contain many previous results as special cases. For cold flows with spherical
symmetry, the solution space can be classified into several regions of behavior
similar ... | 1994-02-16 | 2009-10-22 | [
"astro-ph"
] | Ue-Li Pen |
astro-ph/9402042 | Interactions of Cosmic Ray Nuclei | We present convenient formulae for the energy losses of energetic atomic
nuclei over the entire energy range relevant to the physics of cosmic rays.
Results are applied to a leaky-box equation with a complete loss term. Thereby
we derive the equilibrium spectrum of cosmic rays in various types of galaxies.
We emphasize... | 1994-02-16 | 2007-05-23 | [
"astro-ph"
] | K. Mannheim and R. Schlickeiser |
astro-ph/9402043 | CMB Broad-Band Power Spectrum Estimation | The natural outcome of theoretical calculations of microwave background
anisotropy is the angular power spectrum ${\cal C}_\ell$ as a function of
multipole number $\ell$. Experimental ${\cal C}_\ell$'s are needed for direct
comparison. Estimation procedures using statistics linear in the pixel
amplitudes as well as the... | 1994-02-16 | 2009-09-25 | [
"astro-ph"
] | J. Richard Bond |
astro-ph/9402040 | The contribution of galaxies to OMEGA_0 | We estimate the contribution of galaxies to the cosmological density Omega_0
including also their extended dark halos. We find Omega_gal< 0.1, so implying
that the matter in galaxies cannot by itself close the Universe but marginally
could be baryonic. (latex file)two figures available upon request). | 1994-02-16 | 2007-05-23 | [
"astro-ph"
] | Paolo Salucci, Massimo Persic |
astro-ph/9402041 | How Well Can Cosmological Parameters Be Estimated from CMB Observations? | The CMB anisotropy depends sensitively upon the slope and amplitude of
primordial density and gravitational wave fluctuations, the baryon density, the
Hubble constant, the cosmological constant, the ionization history, {\it etc.}
We report on recent work showing how well multi-scale measurements of the
anisotropy power... | 1994-02-16 | 2009-09-25 | [
"astro-ph",
"gr-qc"
] | J. Richard Bond, Richard L. Davis, and Paul J. Steinhardt |
astro-ph/9402037 | Window Functions for CMB Experiments | We discuss the applicability and derivation of window functions for cosmic
microwave background experiments on large and intermediate angular scales.
These window functions describe the response of the experiment to power in a
particular mode of the fluctuation spectrum. We give general formulae,
illustrated with speci... | 1994-02-15 | 2008-11-26 | [
"astro-ph"
] | Martin White and Mark Srednicki |
astro-ph/9402038 | Reconstructing the CMB power spectrum | We discuss a method for a model independent reconstruction of the CMB
temperature fluctuation power spectrum on small and intermediate scales that is
geared to individual experiments. The importance of off-diagonal correlations
for determining the shape of the power spectrum is emphasized and some examples
of a reconst... | 1994-02-15 | 2009-09-25 | [
"astro-ph"
] | Martin White |
astro-ph/9402034 | Giant Explosion at the Galactic Center and Huge Shocked Shells in the
Halo | We simulate the propagation of a shock front through the galactic halo
induced by an explosion and/or a starburst at the galactic center. A huge
dumbbell ($\Omega$)-shaped shock front produced by an explosion of energy
$3\times 10^{56}$ ergs about fifteen million years ago can mimic the radio and
X-ray North Polar Spur... | 1994-02-14 | 2009-10-22 | [
"astro-ph"
] | Yoshiaki SOFUE |
astro-ph/9402036 | Lensing from the Light-Traces-Mass Map of MS1224+20 | The MS1224+20 cluster of galaxies is a high luminosity X-ray source at
z=0.325. To compare the lensing mass to the virial mass we have completed a
uniform, high precision redshift survey over a field of $7\arcm\times9\arcm$,
obtaining 75 redshifts. The velocity dispersion of 30 cluster galaxies is $775$
\kms\ and the p... | 1994-02-14 | 2009-10-22 | [
"astro-ph"
] | R. G. Carlberg, H. K. C. Yee, and E. Ellingson |
astro-ph/9402035 | The Gunn-Peterson Effect in the Spectrum of the Z=4.7 QSO 1202-0725: The
Intergalactic Medium at Very High Redshift | A measure of the average depression between Lyman absorption lines in the
spectrum of the faint quasar BR1202-0725 ($z_{em}=4.695$) is presented. The
relatively high resolution of the spectrum ($\sim 40$ km s$^{-1}$) allows the
selection of regions free of strong absorption lines in the Lyman alpha forest.
A reliable e... | 1994-02-14 | 2009-10-22 | [
"astro-ph"
] | E. Giallongo, S. D'Odorico, A. Fontana, R. G. McMahon, S. Savaglio, S.
Cristiani, P.Molaro, D. Trevese |
astro-ph/9402033 | A Singularity-Free Cosmological Model with a Conformally Coupled Scalar
Field | We explore the possibility of describing our universe with a
singularity--free, closed, spatially homogeneous and isotropic cosmological
model, using only general relativity and a suitable equation of state which
produces an inflationary era. A phase transition to a radiation--dominated era
occurs as a consequence of b... | 1994-02-13 | 2010-11-01 | [
"astro-ph"
] | S.S. Bayin, F.I. Cooperstock and V. Faraoni |
astro-ph/9402032 | How Cosmic Background Correlations at Large Angles Relate to Mass
Autocorrelations in Space | The Sachs-Wolfe effect is known to produce large angular scale fluctuations
in the Cosmic Microwave Background Radiation (CMBR) due to gravitational
potential fluctuations. We show how the angular correlation function of the
CMBR can be expressed explicitly in terms of the mass autocorrelation function
$\xi (r)$ in the... | 1994-02-12 | 2009-10-22 | [
"astro-ph"
] | George R. Blumenthal and Kathryn V. Johnston |
astro-ph/9402030 | Multiple High-Velocity Emission-Line Systems in the E+S Pair CPG 29 | A detailed study of the mixed-morphology galaxy pair CPG 29 (Arp 119, VV 347)
shows spectacular spectroscopic peculiarities in the southern (spiral)
component (Mkn 984) including a spatially resolved region, roughly aligned
along the minor axis of the galaxy, with multiple emission-line components
redshifted by as much... | 1994-02-11 | 2009-10-22 | [
"astro-ph"
] | P. Marziani, W. C. Keel, D. Dultzin--Hacyan, and J. W. Sulentic |
astro-ph/9402031 | Monopoles as Big as a Universe | We show that, contrary to the standard belief, primordial monopoles expand
exponentially during inflation in the new inflationary universe scenario.
Moreover, inflation of monopoles continues without an end even when inflation
ends in the surrounding space. Therefore primordial monopoles (as well as other
topological d... | 1994-02-11 | 2009-09-29 | [
"astro-ph",
"hep-ph",
"hep-th"
] | Andrei Linde |
astro-ph/9402028 | Is a Massive Tau Neutrino Just What Cold Dark Matter Needs? | The cold dark matter (CDM) scenario for structure formation in the Universe
is very attractive and has many successes; however, when its spectrum of
density perturbations is normalized to the COBE anisotropy measurement the
level of inhomogeneity predicted on small scales is too large. This can be
remedied by a tau neu... | 1994-02-11 | 2009-10-22 | [
"astro-ph"
] | Scott Dodelson, Geza Gyuk, and Michael S. Turner |
astro-ph/9402029 | Microlensing by brown dwarfs: the case of dark clusters | Experiments are looking for diffuse brown dwarfs in the dark galactic halo
through the gravitational lens effect. If brown dwarfs are clumped in dark
clusters, the event rate is not changed, but events are spatially clustered,
and stars nearby a micro-lensed one are likely to be micro-lensed in a near
future. Therefore... | 1994-02-11 | 2007-05-23 | [
"astro-ph"
] | Alain Bouquet, Jean Kaplan and Jean-Manuel Verschaeve |
astro-ph/9402025 | The Distribution of Galactic Disk Stars in Baade's Window | The color-magnitude diagram of $ \sim 3 \times 10^5 $ stars obtained for
Baade's Window towards the Galactic bulge with the OGLE project reveals a
surprisingly narrow main sequence due to galactic disk stars at a distance of
$d \sim 2 $ kpc, i.e. at the location of the Sagittarius spiral arm. A more
careful analysis in... | 1994-02-09 | 2009-10-22 | [
"astro-ph"
] | B. Paczynski, K.Z. Stanek, A. Udalski, M. Szymanski, J. Kaluzny, M.
Kubiak and M. Mateo |
astro-ph/9402026 | An Alternative View of Flat Rotation Curves. II. The Observations | The rotation curves of 20 spiral galaxies are examined in the light of a toy
model (Soares 1992) which has as the main feature the assignment of a high M/L
ratio (=30; Ho=50 km/s/Mpc) to the visible matter. The observed rotation of all
galaxies can be accommodated without the assumption of a dark halo.
Moreover, the ... | 1994-02-09 | 2009-09-25 | [
"astro-ph"
] | D.S.L. Soares |
astro-ph/9402027 | Gravitational Microlensing by Dark Clusters in the Galactic Halo | The dark matter in Galactic halos, or some fraction of it, may be in the form
of dark clusters which consist of small mass objects. Carr & Lacey (1987) have
derived the permissible properties of such systems, and proposed the existence
of dark clusters with mass of order $10^6\solarmass$ to explain some of the
observed... | 1994-02-09 | 2009-10-22 | [
"astro-ph"
] | Eyal Maoz |
astro-ph/9402024 | Spectral Analysis of Microwave Background Perturbations Induced by
Cosmic Strings | Using a simple analytic model based on seed superposition we obtain the
spectrum of microwave background perturbations induced by cosmic strings on all
angular scales larger than about 2 armin. We assume standard recombination in
an Einstein de Sitter universe with $h=1/2$ and study the fluctuation spectrum
along a gre... | 1994-02-09 | 2011-05-10 | [
"astro-ph",
"hep-ph"
] | Leandros Perivolaropoulos (Harvard-Smithsonian CfA) |
astro-ph/9402023 | Signatures of Cosmic Strings on the Microwave Background | ABSRACT: We review recent progress on testing the hypothesis of the existence
of cosmic string perturbations in microwave background maps. Using an
analytical model for the string network we show that the predicted amplitude
and spectrum of MBR fluctuations are consistent with the COBE data for a
reasonable value of th... | 1994-02-09 | 2009-09-25 | [
"astro-ph"
] | Leandros Perivolaropoulos (Harvard-Smithsonian CfA), Richhild Moessner
(Brown U.) and Robert Brandenberger (Brown U.) |
astro-ph/9402019 | Computational aspects of the gravitational instability problem for a
multicomponent cosmological medium | The paper presents results for deriving closed-form analytic solutions of the
non-relativistic linear perturbation equations, which govern the evolution of
inhomogeneities in a homogeneous spatially flat multicomponent cosmological
model. Mathematical methods to derive computable forms of the perturbations are
outlined... | 1994-02-08 | 2009-10-22 | [
"astro-ph"
] | H.J.Haubold and A.M.Mathai |
astro-ph/9402021 | Second-Order Reconstruction of the Inflationary Potential | To first order in the deviation from scale invariance the inflationary
potential and its first two derivatives can be expressed in terms of the
spectral indices of the scalar and tensor perturbations, $n$ and $n_T$, and
their contributions to the variance of the quadrupole CBR temperature
anisotropy, $S$ and $T$. In ad... | 1994-02-08 | 2014-10-13 | [
"astro-ph",
"hep-ph"
] | Andrew R Liddle and Michael S Turner |
astro-ph/9402018 | Anisotropic Scattering of OH/IR Stars Towards the Galactic Center | We have made angular broadening measurements in the satellite line of the OH
molecule at 1612 MHz of 8 OH/IR stars located near the Galactic Center with the
Very Large Array. Early observations with the Very Long Baseline Array had
revealed a region of pronounced scattering approximately centered on SgrA*.
These new ob... | 1994-02-08 | 2009-10-22 | [
"astro-ph"
] | D. A. Frail, P. J. Diamond, J. M. Cordes and H. J. Van Langevelde |
astro-ph/9402020 | Astrophysical thermonuclear functions | As theoretical knowledge and experimental verification of nuclear cross
sections increases it becomes possible to refine analytic representations for
nuclear reaction rates. In this paper mathematical/statistical techniques for
deriving closed-form representations of thermonuclear functions are summarized
and numerical... | 1994-02-08 | 2009-10-22 | [
"astro-ph"
] | W.J. Anderson, H.J. Haubold, and A.M. Mathai |
astro-ph/9402022 | High Resolution Observations of Cepheus a | New high resolution 6 cm observations have been made on Cepheus A using
MERLIN, and combined with new VLA observations at 3.7 cm. Angular resolution
with the latter was 200 mas, and with MERLIN was 60 mas, except for isolated
unresolved sources where 33 mas was achieved. Unresolved objects at 60 mas were
observed in So... | 1994-02-08 | 2015-06-24 | [
"astro-ph"
] | V. A. Hughes, R. J. Cohen, and S. Garrington |
astro-ph/9402017 | Dark Matter in ms1224 from Distortion of Background Galaxies | We explore the dark matter distribution in ms1224.7+2007 using the
gravitational distortion of the images of faint background galaxies. Projected
mass image reconstruction reveals a highly significant concentration coincident
with the X-ray and optical location. The concentration is seen repeatably in
reconstructions f... | 1994-02-08 | 2009-10-22 | [
"astro-ph",
"hep-ph"
] | G.G. Fahlman, Nick Kaiser, Gordon Squires and David Woods |
astro-ph/9402016 | Photometric and H$\alpha$ observations of LSI+61303: detection of a
$\sim$26 day V and JHK band modulation | We present new optical and infrared photometric observations and high
resolution H$\alpha$ spectra of the periodic radio star \lsi. The optical
photometric data set covers the time interval 1985-1993 and amounts to about a
hundred nights. A period of $\sim$26 days is found in the V band. The infrared
data also present ... | 1994-02-07 | 2007-05-23 | [
"astro-ph"
] | J. M. Paredes, P. Marziani, J. Marti, J. Fabregat, M. J. Coe, C.
Everall, F. Figueras, C. Jordi, A. J. Norton, T. Prince, V. Reglero, P.
Roche, J. Torra, S. J. Unger and R. Zamanov |
astro-ph/9402014 | Damped Lyman Alpha Systems and Galaxy Formation | We examine the constraints on theories of galaxy formation that are obtained
from observations of damped $\lya$ (DL) systems, assuming they are gaseous
protodisks in dark matter halos. Using the Press-Schechter formalism, we find
that the mixed dark matter model, with $\ohdm = 0.3$, $\ocdm = 0.65$, $\obaryon
= 0.05$, a... | 1994-02-04 | 2009-10-22 | [
"astro-ph"
] | H.J. Mo and J. Miralda-Escude |
astro-ph/9402012 | A Century of Gamma Ray Burst Models | More than 100 gamma-ray burst progenitor models have now been published in
refereed journals. A list of the models published before the end of 1992 is
presented and briefly discussed. The consensus of the present astronomical
community remains that no specific model is particularly favored for cosmic
bursts. Recent BAT... | 1994-02-04 | 2007-05-23 | [
"astro-ph"
] | Robert J. Nemiroff (NASA/GSFC and George Mason U.) |
astro-ph/9402015 | Constraints on Models of Galaxy Formation from the Evolution of Damped
Ly$\alpha$ Absorption Systems | There is accumulating observational evidence suggesting that damped
Ly$\alpha$ absorption systems systems are the progenitors of present-day spiral
galaxies. We use the observed properties of these systems to place constraints
on the history of star formation in galactic disks, and on cosmological
theories of structure... | 1994-02-04 | 2016-08-14 | [
"astro-ph"
] | Guinevere Kauffmann and St\'ephane Charlot |
astro-ph/9402013 | The spectrum of Sgr A* and its variability | We demonstrate that there is only one physical process required to explain
the spectrum and the variability of the radio source at the dynamical center of
our Galaxy, Sgr A*, in the frequency range from $\approx$1 to $\approx$1000
GHz, namely optically thin synchrotron radiation that is emitted from a
population of rel... | 1994-02-04 | 2007-05-23 | [
"astro-ph"
] | Wolfgang J. Duschl and Harald Lesch |
astro-ph/9402009 | The Nature Of Dark Matter | Collisionless particles, such as cold dark matter, interact only by gravity
and do not have any associated length scale, therefore the dark halos of
galaxies should have negligible core radii. This expectation has been supported
by numerical experiments of collisionless particles within scale free and cold
dark matter ... | 1994-02-03 | 2009-09-25 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | Ben Moore |
astro-ph/9402011 | Low Frequency Quasi-Periodic Oscillations in Low Mass X-Ray Binaries and
Galactic Black Hole Candidates | We consider the inner regions of accretion disks surrounding black holes and
neutron stars and investigate the nonlinear time dependent evolution of
thermal-viscous instabilities. The viscous stress is assumed to be proportional
to the gas pressure with the viscosity parameter formulated as $\alpha
=\min[\alpha_0 (h/r)... | 1994-02-03 | 2009-10-22 | [
"astro-ph"
] | Xingming Chen and Ronald E. Taam (Northwestern U) |
astro-ph/9402010 | Refined Big Bang Nucleosynthesis Constraints on $\Omega_{Baryon}$ and
$N_{\nu}$ | We include correlations between elemental abundances in a Monte Carlo
statistical analysis of BBN predictions, which, along with updated reaction
rates and an improved BBN code, lead to tightened constraints on $\Omega_{B}$
and $N_{\nu}$. Observational upper limits on the primordial \he and $\rm {D +
{^3He}}$ fractions... | 1994-02-03 | 2009-10-22 | [
"astro-ph",
"hep-ph",
"nucl-th"
] | Peter J. Kernan and Lawrence M. Krauss |
astro-ph/9402005 | Far-IR Properties of Early Type Galaxies | We have investigated the IRAS colours and the far-IR to optical luminosity
ratios of a complete sample of elliptical's and S0's brighter than $B_T = 12$.
On the average, elliptical galaxies emit in the far-IR less than 1\% of their
bolometric luminosity, while S0's are about a factor of three brighter in the
far-IR. On... | 1994-02-02 | 2009-10-22 | [
"astro-ph"
] | P. Mazzei and G. De Zotti |
astro-ph/9402003 | Shear Fields and the Evolution of Galactic-Scale Density Peaks | We present preliminary results of our investigation into the influence of
shear fields on the evolution of galactic scale fluctuations in a primordial
Gaussian random density field. Specifically, we study how the matter associated
with a galaxy-scale peak evolves, to determine whether the shear can affect the
peak's ab... | 1994-02-02 | 2009-10-22 | [
"astro-ph"
] | Rien van de Weygaert and Arif Babul |
astro-ph/9402006 | Constraints on the Models for Structure Formation from the Abundance of
Damped Lyman Alpha Systems | Models for structure formation attempt to predict the power spectrum of
density perturbations in the present universe from the initial power spectrum
and the nature of dark matter. Observational constraints on the power spectrum
at different scales in the present epoch can, therefore, be used to eliminate
(or choose be... | 1994-02-02 | 2007-05-23 | [
"astro-ph",
"gr-qc"
] | K.Subramanian and T.Padmanabhan |
astro-ph/9402007 | Search For Unresolved Sources In The COBE-DMR Two-Year Sky Maps | We have searched the temperature maps from the COBE Differential Microwave
Radiometers (DMR) first two years of data for evidence of unresolved sources.
The high-latitude sky (|b| > 30\deg) contains no sources brighter than 192 uK
thermodynamic temperature (322 Jy at 53 GHz). The cumulative count of sources
brighter th... | 1994-02-02 | 2009-10-22 | [
"astro-ph"
] | A. Kogut, A.J. Banday, C.L. Bennett, G. Hinshaw, K. Loewenstein, P.
Lubin, G.F. Smoot, and E.L. Wright |
astro-ph/9402008 | Is There a Planet in the PSR 1620-26 Triple System? | The unusually large eccentricity ($e_1=0.025$) of the low-mass binary
millisecond pulsar PSR B1620-26 can be explained naturally as arising from the
secular perturbation of a second, more distant companion. Such a triple
configuration has been proposed recently as the most likely cause of the
anomalous second period de... | 1994-02-02 | 2009-10-22 | [
"astro-ph"
] | F. A. Rasio |
astro-ph/9402004 | Observational and Theoretical Constraints on Singular Dark Matter Halos | The distribution of dark matter around galactic or cluster halos has usually
been assumed to be approximately isothermal with a non-zero core radius, which
is expected to be of the order of the size of the visible matter distribution.
Recently, the possibility has been raised that dark matter halos might be
singular in... | 1994-02-02 | 2009-10-22 | [
"astro-ph",
"hep-ph"
] | Ricardo A. Flores and Joel R. Primack |
astro-ph/9402002 | Hydrogen Clouds and the MACHO/EROS Events | We propose that the recently reported MACHO/EROS events correspond to
gravitational amplification by dark clouds rather than compact objects. These
clouds must be very dense with $M\sim 0.1 ~M_\odot$ and $R\la 10^{14}~{\rm
cm}$. In all likelihood, the clouds will be members of a family of objects with
different sizes a... | 1994-02-01 | 2009-10-22 | [
"astro-ph"
] | Richard N. Henriksen and Lawrence M. Widrow |
astro-ph/9402001 | A Recipe for Galaxy Formation Shaun Cole | We present a detailed prescription for how galaxy formation can be modelled
in hierarchical theories of structure formation. Our model incorporates the
formation and merging of dark matter halos, the shock heating and radiative
cooling of baryonic gas gravitationally confined in these halos, the formation
of stars regu... | 1994-02-01 | 2015-06-24 | [
"astro-ph"
] | Alfonso Aragon-Salamanca, Carlos S. Frenk, Julio F. Navarro and
Stephen E. Zepf |
astro-ph/9401051 | A Survey of Faint Galaxy Pairs | A sample of faint, V magnitude selected, galaxy pairs, having physical
separations less than approximately 20\hkpc, is used to examine the rise in the
merger rate with redshift and the statistical relations between close pairs and
the field galaxy population. Redshifts have been obtained for 14 galaxies ($V
\le 22.5$) ... | 1994-01-31 | 2009-10-22 | [
"astro-ph"
] | Carlberg, Pritchet and Infante |
astro-ph/9401050 | Limits on Direct Detection of Gravitational Waves | We compute energy density and strain induced by a primordial spectrum of
gravitational waves on terrestrial- and space-based detectors (e.g., LIGO) as
constrained by the COBE detection of microwave background anisotropy. For the
case where the spectrum is created during inflation, we find new, stricter
upper bounds on ... | 1994-01-28 | 2009-10-22 | [
"astro-ph",
"gr-qc"
] | R. Bar-Kana |
astro-ph/9401048 | Scale-Invariant Spectrum of Cosmic Background Radiation as a Feature of
the Universe with Negative Curvature | As was shown before (Gurzadyan and Kocharyan, 1992, 1993ab) the statistical
properties (exponential mixing) of motion of CMB photon beams in Friedmann
Universe with negative curvature can have definite observable consequences
including the decrease of the CMB anisotropy amplitude after the last
scattering, distortion o... | 1994-01-28 | 2008-02-03 | [
"astro-ph"
] | V.G.Gurzadyan and A.A.Kocharyan |
astro-ph/9401049 | Testing the Peculiar Velocity Field predicted from Redshift Surveys | The reconstruction of the peculiar velocity field from the 1.936~Jy iras
selected sample of galaxies is compared to a similar reconstruction from an
optically selected sample. A general method for combining different samples to
reconstruct a self-consistent density and peculiar velocity field is presented.
The method i... | 1994-01-28 | 2015-06-24 | [
"astro-ph"
] | Wolfram Freudling, Luiz Nicolaci da Costa, Paulo S. Pellegrini |
astro-ph/9401047 | The Statistics of Gamma Ray Burst Lensing | Possibly the only unambiguous verification that gamma-ray bursts (GRBs) are
at cosmological distances would be the observation of multiple images of a
gravitationally lensed burst. Each images would arrive at a different time, but
exhibit identical light curves. We improve upon previous calculations of GRB
lensing by u... | 1994-01-27 | 2009-10-22 | [
"astro-ph"
] | S.A. Grossman and M.A. Nowak |
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