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/9408028 | Cold Dark Matter I: The Formation of Dark Halos | We use numerical simulations of critically-closed cold dark matter (CDM)
models to study the effects of numerical resolution on observable quantities.
We study simulations with up to $256^3$ particles using the particle-mesh (PM)
method and with up to $144^3$ particles using the adaptive particle-particle
--particle-me... | 1994-08-09 | 2009-10-22 | [
"astro-ph"
] | James M. Gelb and Edmund Bertschinger |
astro-ph/9408029 | Cold Dark Matter II: Spatial and Velocity Statistics | We examine high-resolution gravitational N-body simulations of the $\Omega=1$
cold dark matter (CDM) model in order to determine whether there is any
normalization of the initial density fluctuation spectrum that yields
acceptable results for galaxy clustering and velocities. Dense dark matter
halos in the evolved mass... | 1994-08-09 | 2009-10-22 | [
"astro-ph"
] | James M. Gelb and Edmund Bertschinger |
astro-ph/9408027 | Tomography of Collisionless Stellar Systems | In this paper the concept of tomography of a collisionless stellar system of
general shape is introduced, and a generalization of the Projected Virial
Theorem is obtained. Applying the tomographic procedure we then derive a new
family of virial equations which coincides with the already known ones for
spherically symme... | 1994-08-09 | 2009-10-22 | [
"astro-ph"
] | L. Ciotti (Osservatorio Astronomico di Bologna) |
astro-ph/9408026 | The Optical Gravitational Lensing Experiment. the Early Warning System | The discoveries of 17 microlensing event candidates have been reported over
the last year by three teams conducting unprecedented mass photometric searches
in the direction of the Galactic bulge and the Magellanic Clouds. These include
10 events found by the OGLE collaboration, 5 by the MACHO team and 2 by the
EROS tea... | 1994-08-08 | 2009-09-25 | [
"astro-ph"
] | A. Udalski, M. Szymanski, J. Kaluzny, M. Kubiak, M. Mateo, W.
Krzeminski, and B.Paczynski |
astro-ph/9408024 | Symplectic Integration without Roundoff Error | Most numerical integration algorithms are not designed specifically for
Hamiltonian systems and do not respect their characteristic properties, which
include the preservation of phase space volume with time. This can lead to
spurious damping or excitation. Methods that do preserve all the Hamiltonian
properties, i.e., ... | 1994-08-08 | 2015-06-24 | [
"astro-ph",
"chao-dyn",
"comp-gas",
"nlin.CD",
"nlin.CG",
"nlin.SI",
"solv-int"
] | David JD Earn |
astro-ph/9408025 | Finite Disks with Power-Law Potentials | We describe a family of circular, and elliptical, finite disks with a disk
potential that is a power of the radius. These are all flattened ellipsoids,
obtained by squashing finite spheres with a power-law density distribution, and
cutoff at some radius Ro. First we discuss circular disks whose circular
rotation speed ... | 1994-08-08 | 2009-10-22 | [
"astro-ph"
] | R. Brada and M. Milgrom |
astro-ph/9408023 | Big Bang Nucleosynthesis Constraints and Light Element Abundance
Estimates | To elucidate the significance of the effect of systematic uncertainties in
light element abundance estimates on cosmological bounds derivable from Big
Bang Nucleosynthesis (BBN) we present tables giving bounds on $\Omega_{baryon}$
and $N_{\nu}$ as one changes the limits on primordial \he and $^7$Li. This
allows us to d... | 1994-08-07 | 2009-10-22 | [
"astro-ph",
"hep-ph"
] | Lawrence M. Krauss and Peter J. Kernan |
astro-ph/9408022 | The Orientation of Spin Vectors of Galaxies in the Ursa Major Filament | Spin vectors of 60 galaxies in the ``Ursa Major Filament'' are obtained from
CCD images and spectroscopic determinations of the directions of rotation.
These data are used to remove the four-fold degeneracy introduced by the
project ed images of galaxies, making possible the complete reconstruction of
the galaxy spin v... | 1994-08-06 | 2009-10-22 | [
"astro-ph"
] | Cheongho Han, et al |
astro-ph/9408019 | Hierarchical Pancaking: Why the Zel'dovich Approximation Describes
Coherent Large-Scale Structure in N-Body Simulations of Gravitational
Clustering | To explain the rich structure of voids, clusters, sheets, and filaments
apparent in the Universe, we present evidence for the convergence of the two
classic approaches to gravitational clustering, the ``pancake'' and
``hierarchical'' pictures. We compare these two models by looking at agreement
between individual struc... | 1994-08-05 | 2015-06-24 | [
"astro-ph",
"gr-qc"
] | Jennifer L. Pauls and Adrian L. Melott |
astro-ph/9408018 | Velocity Fields in Non--Gaussian Cold Dark Matter Models | We analyse the large--scale velocity field obtained by N--body simulations of
cold dark matter (CDM) models with non--Gaussian primordial density
fluctuations, considering models with both positive and negative primordial
skewness in the density fluctuation distribution. We study the velocity
probability distribution a... | 1994-08-05 | 2015-06-24 | [
"astro-ph"
] | F. Lucchin, S. Matarrese, A. Messina, L. Moscardini and G. Tormen |
astro-ph/9408020 | Are BL Lacertae Objects Beamed QSO Remnants? | This paper considers the hypothesis that BL Lacertae objects (BLLs) are the
beamed remnants of Quasi Stellar Objects. The hypothesis explains why BLLs do
not undergo the strong evolution seen in other active galactic nuclei since it
naturally predicts that the space density of BLLs should increase with cosmic
time, as ... | 1994-08-05 | 2007-05-23 | [
"astro-ph"
] | E.F. Borra |
astro-ph/9408021 | BIMA observations of possible microwave background sources | We present sensitive upper limits on the 90 GHz flux of known radio and
infrared sources in regions associated with possible cosmic microwave
background fluctuations at 0.5--1 degree scales. Specifically we look at the
MAX GUM region and the region of strongest fluctuation in the MSAM scan. None
of the known sources ca... | 1994-08-05 | 2007-05-23 | [
"astro-ph"
] | Lawrence M. Chernin & Douglas Scott |
astro-ph/9408017 | Evolution of the Potential in Cosmological Gravitational Clustering | In recent years there has been a developing realization that the interesting
large--scale structure of voids, ``pancakes", and filaments in the Universe is
a consequence of the efficacy of an approximation scheme for cosmological
gravitation clustering proposal by Zel'dovich in 1970. However, this scheme was
only suppo... | 1994-08-04 | 2009-09-25 | [
"astro-ph",
"gr-qc"
] | Adrian L. Melott and Jennifer L. Pauls (Department of Physics and
Astronomy, University of Kansas) |
astro-ph/9408016 | The Andante Regime of Scalar Field Dynamics | The andante regime of scalar field dynamics in the chaotic inflationary
Universe is defined as the epoch when the field is rolling moderately slowly
down its interaction potential, but at such a rate that first-order corrections
to the slow-roll approximation become important. These conditions should apply
towards the ... | 1994-08-04 | 2009-10-22 | [
"astro-ph"
] | James E. Lidsey and I. Waga |
astro-ph/9408013 | Gamma-Rays from the Funnels of Thick Accretion Disks Around Active
Galactic Nuclei | We analyse the propagation of particles in the narrow funnel of a thick
accretion disk. It is assumed that: (1) the funnel walls emit black body
radiation with temperature decreasing outwards; (2) the magnetic and electric
fields are longitudinal in the funnel. Such a scenario is consistent with
models in which a large... | 1994-08-04 | 2007-05-23 | [
"astro-ph"
] | W. Bednarek and J.G. Kirk |
astro-ph/9408015 | Formalising the Slow-Roll Approximation in Inflation | The meaning of the inflationary slow-roll approximation is formalised.
Comparisons are made between an approach based on the Hamilton-Jacobi
equations, governing the evolution of the Hubble parameter, and the usual
scenario based on the evolution of the potential energy density. The vital role
of the inflationary attra... | 1994-08-04 | 2009-10-22 | [
"astro-ph"
] | Andrew R. Liddle, Paul Parsons and John D. Barrow |
astro-ph/9408014 | Evidences of Secular Dynamical Evolution in Disk Galaxies | After a recall of fundamental concepts used in galactic dynamics, we review
observational facts as well as results of orbit theory and numerical
simulations which suggest long-term evolution of galaxies. Dynamical
interactions between galaxy constituents (bulges, disks, bars, haloes, dark
matter) are discussed and effe... | 1994-08-04 | 2007-05-23 | [
"astro-ph"
] | Louis Martinet |
astro-ph/9408010 | The Reliability of X-ray Constraints of Intrinsic Cluster Shapes | Using the simulation of Katz & White we have tested the viability of X-ray
analysis for constraining the intrinsic shapes of clusters of galaxies
considering the effects of both substructure and steep temperature gradients.
We restrict analysis to aggregate cluster shapes on scales of $r\sim 1-2$ Mpc
to reduce our sens... | 1994-08-03 | 2009-10-22 | [
"astro-ph"
] | D. A. Buote and J. C. Tsai |
astro-ph/9408011 | The Near-Infrared Structure and Spectra of the Bipolar Nebulae M 2--9
and Afgl 2688: The Role of UV-Pumping and Shocks in Molecular Hydrogen
Excitation | High-resolution near-infrared images and moderate resolution spectra were
obtained of the bipolar nebulae M~2--9 and AFGL 2688. The ability to spatially
and spectrally resolve the various components of the nebulae has proved to be
important in determining their physical structure and characteristics. In
M~2--9, the lob... | 1994-08-03 | 2009-10-22 | [
"astro-ph"
] | Joseph L. Hora and William B. Latter |
astro-ph/9408012 | Cosmic Ray Hydrodynamics at Shock Fronts | When a magnetised, thermal plasma containing a shock wave efficiently
accelerates Cosmic Rays (CR) a reaction is exerted on the fluid structure. The
simplest description of this process involves three conservation equations for
the background fluid, with the CR pressure gradient included as an extra force,
plus a hydro... | 1994-08-03 | 2007-05-23 | [
"astro-ph"
] | P. Duffy, L.O'C. Drury and H.J.Voelk |
astro-ph/9408009 | The Width of the Gamma-ray Burst Luminosity Function | We examine the width of the gamma-ray burst (GRB) luminosity function through
the distribution of GRB peak count rates, C$_{\rm{peak}}$, as detected by BATSE
(\cite{batse:93}). In the context of galactic corona spatial distribution
models, we attempt to place constraints on the characteristic width of the
luminosity fu... | 1994-08-02 | 2009-10-22 | [
"astro-ph"
] | Andrew Ulmer and Ralph A.M.J. Wijers |
astro-ph/9408005 | The Difference between Radio-Loud and Radio-Quiet Active Galaxies | The recent development of unified theories of active galactic nuclei (AGN)
has indicated that there are two physically distinct classes of these objects -
radio-loud and radio-quiet. The primary observational distinctions between the
two types are: (1) The radio-loud objects produce large scale radio jets and
lobes, wi... | 1994-08-02 | 2016-08-30 | [
"astro-ph"
] | Andrew S. Wilson and Edward J. M. Colbert |
astro-ph/9408008 | On the nature of gamma-ray burst time dilations | The recent discovery that faint gamma-ray bursts are stretched in time
relative to bright ones has been interpreted as support for cosmological
distances: faint bursts have their durations redshifted relative to bright
ones. It was pointed out, however, that the relative time stretching can also
be produced by an intri... | 1994-08-02 | 2007-05-23 | [
"astro-ph"
] | Ralph A.M.J. Wijers and Bohdan Paczy\'nski |
astro-ph/9408007 | Light Element Abundance Inhomogeneities in Globular Clusters: Probing
Star Formation and Evolution in the Early Milky Way | Abundance patterns of the elements C, N, and O are sensitive probes of
stellar nucleosynthesis processes and, in addition, O abundances are an
important input for stellar age determinations. Understanding the nature of the
observed distribution of these elements is key to constraining protogalactic
star formation histo... | 1994-08-02 | 2015-06-24 | [
"astro-ph"
] | M. M. Briley, R. A. Bell, J. E. Hesser, and G. H. Smith |
astro-ph/9408004 | Self-Lensing By A Stellar Disk | I derive a general expression for the optical depth $\tau$ for gravitational
lensing of stars in a disk by Massive Compact Objects (Machos) in the same
disk. For the more restricted case where the disk is self-gravitating and the
stars and Machos have the same distribution function, I find $\tau =
2\VEV{v^2}/c^2\sec^2 ... | 1994-08-01 | 2009-10-22 | [
"astro-ph"
] | Andrew Gould |
astro-ph/9408001 | Polarization-Temperature Correlations in the Microwave Background | The polarization of the CMB offers a potentially valuable probe of the
physics of the early universe, specifically of the velocity of the
photon-baryon fluid on the last scattering surface. Here we discuss
qualitatively the correlations that arise between the temperature anisotropies
and polarization of the CMB and how... | 1994-08-01 | 2007-05-23 | [
"astro-ph"
] | Robert Crittenden |
astro-ph/9408002 | Dark Matter in the Light of COBE | The observations of all three COBE instruments are examined for the effects
of dark matter. The anisotropy measured by the DMR, and especially the
degree-scale ground- and balloon-based experiments, is only compatible with
large-scale structure formation by gravity if the Universe is dominated by
non-baryonic dark matt... | 1994-08-01 | 2007-05-23 | [
"astro-ph"
] | Edward L. Wright |
astro-ph/9408006 | Response to Comments on "Neutrino Flavor Evolution Near a Supernova's
Core" | In a recent paper I concluded that the neutrino background is important for
calculating neutrino flavor evolution in supernovae, and including it weakens
the connection between r-process nucleosynthesis and cosmologically relevant
neutrino masses. Comments on this paper have been posted to this bulletin
board; one by J... | 1994-08-01 | 2007-05-23 | [
"astro-ph",
"hep-ph"
] | J. Pantaleone |
astro-ph/9408003 | Comparison of Spectral Index Determinations | The index $n$ of a power law power spectrum of primordial density
fluctuations, $P(k) \propto k^n$, has been estimated using many different
techniques. The most precise compare the COBE DMR large angular scale $\Delta
T$ to the amplitude of the large scale structure, but these are also the most
model-dependent. The COB... | 1994-08-01 | 2007-05-23 | [
"astro-ph"
] | Edward L. Wright |
astro-ph/9407100 | Estimation of Peculiar Velocity from the Inverse Tully-Fisher Relation | We present a method for deriving a smoothed estimate of the peculiar velocity
field of a set of galaxies with measured circular velocities $\eta\equiv {\rm
log} \Delta v$ and apparent magnitudes $m$. The method is based on minimizing
the scatter of a linear inverse Tully-Fisher relation $\eta= \eta(M)$ where the
absolu... | 1994-07-30 | 2015-06-24 | [
"astro-ph"
] | Adi Nusser and Marc Davis |
astro-ph/9407099 | Implications of a High Population II B/Be Ratio | The observed B/Be ratio in extreme Pop II stars has been interpreted as
evidence of Be and B synthesis by early galactic cosmic rays. However, a recent
reanalysis of the boron abundance in the Pop II halo star HD140283 suggests
that B/H may be larger than previously reported, by as much as a factor of 4.
This would yie... | 1994-07-29 | 2009-09-25 | [
"astro-ph"
] | B. Fields, K. Olive, and D. Schramm |
astro-ph/9407098 | The Distances to Five Type~II Supernovae Using the Expanding Photosphere
Method and the Value of $H_0$ | We have used observations gathered at CTIO to measure distances by the
Expanding Photosphere Method (EPM) to 5 Type II supernovae. These supernovae
lie at redshifts from cz = 1100 km/s to z = 5500 km/s, and increase to 18 the
number of distances measured using EPM. We compare distances derived to 11 Type
II supernovae ... | 1994-07-29 | 2007-05-23 | [
"astro-ph"
] | Brian P. Schmidt Robert P. Kirshner, Ronald G. Eastman, Mark M.
Phillips, Nicholas B. Suntzeff, Mario Hamuy, Jose Maza, and Roberto Aviles |
astro-ph/9407097 | SN~1991T: Reflections of Past Glory | We have obtained photometry and spectra of SN~1991T which extend more than
1000 days past maximum light, by far the longest a SN~Ia has been followed.
Although SN~1991T exhibited nearly normal photometric behavior in the first 400
days following maximum, by 600 days its decline had slowed, and by 950~days the
supernova... | 1994-07-29 | 2009-10-22 | [
"astro-ph"
] | Brian P. Schmidt, Robert P. Kirshner, Bruno Leibundgut, Lisa A. Wells,
Alain C. Porter, Pilar Ruiz-Lapuente, Peter Challis and Alexei V. Filippenko |
astro-ph/9407096 | Gravitational Microlensing by the Globular Cluster Stars | The microlensing of background stars by compact objects in globular clusters
is analyzed. The main strength of the proposed search is the direct
relationship between the lens mass and the time scale of the microlensing
event. The main problem is the low overall rate of expected events which
implies that a ground based ... | 1994-07-29 | 2007-05-23 | [
"astro-ph"
] | Bohdan Paczynski |
astro-ph/9407095 | Kurtosis of Large-Scale Cosmic Fields | An attractive and simple hypothesis for the formation of large-scale
structure is that it developed by gravitational instability from primordial
fluctuations with an initially Gaussian probability distribution. Non-linear
gravitational evolution drives the distribution away from the Gaussian form,
generating measurable... | 1994-07-29 | 2015-06-24 | [
"astro-ph"
] | Ewa Luiza Lokas, Roman Juszkiewicz, David Weinberg, and Francois
Bouchet |
astro-ph/9407094 | 9 Aurigae: Strong Evidence for Non-Radial Pulsations | We present further photometric observations of the unusual F0 V star 9
Aurigae and present evidence that this star's radial velocity, spectroscopic
line widths and line depths are also variable with the same frequencies as the
photometric data ($f_1 \approx 0.795$ and $f_2 \approx 0.345$ d$^{-1}$). The
phases of these ... | 1994-07-29 | 2015-06-24 | [
"astro-ph"
] | Kevin Krisciunas, Roger F. Griffin, Edward F. Guinan, Kenneth D.
Luedeke, and George P. McCook |
astro-ph/9407091 | Cosmological Parameters from Angular Correlations between Qsos and
Galaxies | The angular two-point correlation function between background QSOs and
foreground galaxies induced by gravitational lensing is derived. It is shown
that the shape of this correlation function depends sensitively on the spectrum
of the density fluctuations in the Universe, thus providing a possibility to
distinguish bet... | 1994-07-28 | 2007-05-23 | [
"astro-ph"
] | Matthias Bartelmann |
astro-ph/9407093 | Anisotropies in the Cosmic Microwave Background: An Analytic Approach | We introduce a simple yet powerful {\it analytic} method which obtains the
structure of cosmic microwave background anisotropies to better than 5-10\% in
temperature fluctuations on {\it all} scales. It is applicable to {\it any}
model in which the potential fluctuations at recombination are both linear and
known. More... | 1994-07-28 | 2009-07-17 | [
"astro-ph"
] | Wayne Hu and Naoshi Sugiyama |
astro-ph/9407092 | The Discovery of 8.7s Pulsations from the Ultrasoft X-Ray Source
4u0142+614 | We discovered a periodicity at about 8.7s from the X--ray sources 4U0142+61,
previously considered a possible black hole candidate on the basis of its
ultrasoft spectrum. The pulsations are visible only in the 1--4 keV energy
range, during an observation obtained with the EXOSAT satellite in August 1984.
A search for d... | 1994-07-28 | 2009-10-22 | [
"astro-ph"
] | G.L. Israel, S. Mereghetti and L. Stella |
astro-ph/9407087 | Quantum Diffusion of Planck Mass and the Evolution of the Universe | A theory of evolution for the Universe requires both a mutation mechanism and
a selection mechanism. We propose that both can be encountered in the
stochastic approach to quantum cosmology. In Brans--Dicke chaotic inflation,
the quantum fluctuations of Planck mass behave as mutations, such that new
inflationary domains... | 1994-07-27 | 2009-10-22 | [
"astro-ph",
"gr-qc",
"hep-th"
] | Juan Garcia-Bellido |
astro-ph/9407090 | BATSE Observations of Gamma-Ray Burst Spectra. II. Peak Energy Evolution
in Bright, Long Bursts - | We investigate spectral evolution in 37 bright, long gamma-ray bursts
observed with the BATSE Spectroscopy Detectors. High resolution spectra are
characterized by the energy of the peak of \nfn~and the evolution of this
quantity is examined relative to the emission intensity. In most cases it is
found that this peak en... | 1994-07-27 | 2009-10-22 | [
"astro-ph"
] | L.A. Ford, D.L. Band, J.L. Matteson, M.S. Briggs, G.N. Pendleton, R.D.
Preece, W.S. Paciesas, B.J. Teegarden, D.M. Palmer, B.E. Schaefer, T.L.
Cline, G.J. Fishman, C. Kouveliotou, C.A. Meegan, R.B. Wilson, and J.P.
Lestrade |
astro-ph/9407088 | A Near-Infrared Variant of the Barnes-Evans Method For Finding Cepheid
Distances Calibrated with High-Precision Angular Diameters | The advantages of a near-infrared variant of the Barnes-Evans method for
estimating distances to Cepheid variables are described and quantified. A
surface brightness-color relation for $K$ photometry and the $(V-K)_0$ color
index is established using modern, high-precision angular diameters from
optical interferometers... | 1994-07-27 | 2009-10-22 | [
"astro-ph"
] | D.L. Welch |
astro-ph/9407089 | When Can Non-Gaussian Density Fields Produce a Gaussian Sachs-Wolfe
Effect? | The Sachs-Wolfe temperature fluctuations produced by primordial density
perturbations are proportional to the potential field \phi, which is a weighted
integral over the density field \delta. Because of the central limit theorem,
\phi can be approximately Gaussian even when \delta is non-Gaussian. Using the
Wold repres... | 1994-07-27 | 2011-05-12 | [
"astro-ph"
] | Robert J. Scherrer and Robert K. Schaefer |
astro-ph/9407085 | Do Galactic Systems Form Too Late in Cold+Hot Dark Matter Models? | The abundance of galactic systems at high redshifts can impose a strong
constraint on the cold+hot dark matter (CDM+HDM) models. The hot component
reduces the excessive small-scale power in the COBE-normalized CDM model but
also delays the epoch of galaxy formation. We present results from the first
numerical simulatio... | 1994-07-26 | 2009-10-22 | [
"astro-ph",
"hep-ph"
] | Chung-Pei Ma and Edmund Bertschinger |
astro-ph/9407084 | The Optical Gravitational Lensing Experiment. OGLE #7: Binary Microlens
or a New Unusual Variable? | We present the light curve of an unusual variable object, OGLE #7, detected
during the OGLE search for microlensing events. After one season of being in a
low, normal state, the star brightened by more than 2~mag with a characteristic
double-maximum shape, and returned to normal brightness after 60 days. We
consider po... | 1994-07-26 | 2009-10-22 | [
"astro-ph"
] | A. Udalski, M. Szymanski, S. Mao, R. Di Stefano, J. Kaluzny, M.
Kubiak, M. Mateo, and W. Krzeminski |
astro-ph/9407081 | High Velocity Oblique Cloud Collision and Star and Star Cluster
Formation through Gravitational Instability of the Shock-Compressed Slab with
Rotation and Velocity Shear | We study the gravitational instability of an isothermal gaseous slab formed
by cloud-cloud collision and compression at the cloud interface. The compressed
gaseous slab rotates and has velocity shear except when the collision is not
exactly head-on. The effects of the rotation and velocity shear on the
gravitational in... | 1994-07-26 | 2007-05-23 | [
"astro-ph"
] | Masatoshi Usami, Tomoyuki Hanawa, and Mitsuaki Fujimoto |
astro-ph/9407083 | High-Order Correlations of Rich Galaxy Clusters | We analyse the two--dimensional all--sky distribution of rich Abell and ACO
galaxy clusters by using counts in cells and measuring the high--order
area--averaged angular correlation functions. Confirming previous results, we
find a well defined hierarchical relation between the two and three--point
correlation function... | 1994-07-26 | 2009-10-22 | [
"astro-ph"
] | A.Cappi & S.Maurogordato |
astro-ph/9407080 | A Possible Optical Counterpart for the Triple Pulsar System PSR B1620-26 | We have searched deep optical images of the globular cluster M4 for a
possible optical counterpart for the third body in the PSR B1620-26 system. We
identify as a possible optical counterpart a star located within $0.3''$ of the
nominal pulsar position with $V\approx 20$. This magnitude is consistent with a
main sequen... | 1994-07-26 | 2009-10-22 | [
"astro-ph"
] | C. D. Bailyn, E. P. Rubenstein, T. M. Girard, D. Dinescu, F. A. Rasio,
and B. Yanny |
astro-ph/9407082 | About the Malmquist bias in the determination of H0 and of distances of
galaxies | We provide the mathematical framework which elucidates the way of using a
Tully-Fisher (TF) like relation in the determination of the Hubble constant
$H_0$, as well as for distances of galaxies. The methods related to the
so-called Direct and Inverse TF Relations (herein DTF and ITF) are interpreted
as maximum likeliho... | 1994-07-26 | 2019-08-17 | [
"astro-ph"
] | R.Triay, M.Lachieze-Rey, S.Rauzy |
astro-ph/9407086 | Low Mass X-Ray Binaries in Globular Clusters: A New Metallicity Effect | Galactic Globular Clusters (GCs) containing bright X sources (L_x > 10^{36}
erg/s), commonly associated with Low Mass X-Ray Binaries (LMXBs), are found to
be significantly denser and more metal-rich than normal non-X-ray clusters both
in the Galaxy and in M31. Within a framework where LMXBs in GCs are generated
via tid... | 1994-07-26 | 2009-10-22 | [
"astro-ph"
] | M. Bellazzini, A. Pasquali, L. Federici, F.R. Ferraro, F. Fusi Pecci |
astro-ph/9407074 | Dark Filaments in the Galaxy NGC 253 - a Boiling Galactic Disk - | We study the morphology of dark lanes and filaments in the dust-rich galaxy
NGC 253 using an unsharp-masked $B$-band optical photograph. Dust features are
classified as `arcs', which have heights and scale radius of about 100 to 300
pc, connecting two or more dark clouds, and `loops' and `bubbles', which are
developed ... | 1994-07-25 | 2009-10-22 | [
"astro-ph"
] | Yoshiaki Sofue, Ken-ichi Wakamatsu, and David F. Malin |
astro-ph/9407077 | Ubv CCD Standards Near 5C1 Radio Sources at Intermediate Galactic
Latitude-I | We have been doing a photometric and astrometric sample survey programme on
Schmidt plates in a few selected directions in the Galaxy with an aim to study
galactic stellar populations. In order to calibrate Schmidt plates
photometrically, it is necessary to have a number of photometric standards
which cover the entire ... | 1994-07-25 | 2007-05-23 | [
"astro-ph"
] | V.Mohan, D.K.Ojha, O.Bienayme, D.C.Paliwal, A.K.Pandey, A.C.Robin,
M.Chareton, B.C.Bhatt, B.B.Sanwal, E.Oblak, M. Haywood and M.Creze |
astro-ph/9407079 | Bias and high-order galaxy correlation functions in the APM Galaxy
Survey | On large scales, the higher order moments of the mass distribution,
$S_J=\xibar_J/\xibar_2^{J-1}$, e.g., the skewness $S_3$ and kurtosis $S_4$, can
be predicted using non-linear perturbation theory. Comparison of these
predictions with moments of the observed galaxy distribution probes the bias
between galaxies and mas... | 1994-07-25 | 2009-10-22 | [
"astro-ph"
] | E. Gaztanaga and J. Frieman |
astro-ph/9407076 | The Two-Point Correlation Function of Rich Clusters of Galaxies: Results
from an Extended APM Cluster Redshift Survey | We present new estimates of the spatial two-point correlation function of
rich clusters of galaxies selected from the APM Galaxy Survey. We have measured
redshifts for a sample of $364$ clusters out to a depth of $\sim 450\hmpc$. The
clusters have a mean space density of $\bar{n} = 3.4\times 10^{-5}\hmpccc$. The
two-po... | 1994-07-25 | 2016-06-08 | [
"astro-ph"
] | G.B. Dalton, R.A.C. Croft, G. Efstathiou, W.J. Sutherland, S.J.
Maddox, & M. Davis |
astro-ph/9407075 | A Multicolor Survey of Absolute Proper Motions : Galactic Structure and
Kinematics in the Direction of Galactic Center at Intermediate Latitude | We have derived a new photographic photometry and proper motions for 20000
stars with completeness to V = 18 in the direction of galactic center at the
intermediate latitude (l = 3 deg,b = 47 deg; alpha(1950)=15h 18m, delta(1950) =
+02deg 16') for a 15.5 sq deg field. The combination of four glass copies of
the Palomar... | 1994-07-25 | 2007-05-23 | [
"astro-ph"
] | D.K.Ojha, O.Bienayme, A.C.Robin and V.Mohan |
astro-ph/9407078 | A Giant Arc in a ROSAT Detected Cluster of Galaxies | We report the serendipitous discovery of a giant grvitational arc in the
Abell Supplementary cluster S295 during optical follow-up observations of
clusters detected in the ROSAT All-Sky Survey. The cluster has a redshift
z=0.3007 and a velocity dispersion of about 900 km/sec. This is the first giant
arc newly found in ... | 1994-07-25 | 2007-05-23 | [
"astro-ph"
] | A.C.Edge, H.Boehringer, L.Guzzo, et al |
astro-ph/9407071 | Exact Solutions and Approximations of Mond Fields of Disk Galaxies | We Consider models of thin disks (with and without bulges) in the
Bekenstein-Milgrom formulation of MOND as a modification of Newtonian gravity.
Analytic solutions are found for the full gravitational fields of Kuzmin disks,
and of disk-plus-bulge generalizations of them.
For all these models a simple algebraic relat... | 1994-07-24 | 2007-05-23 | [
"astro-ph"
] | R.Brada and M.Milgrom (Weizmann Institute of Science) |
astro-ph/9407073 | The Existence of Baryons at z=1000 | Fluctuations in the CMB have now been detected over a wide range of angular
scales, and a consistent picture seems to be emerging. The data cannot
currently constrain a large number of cosmological parameters, but it is clear
that there is more information than just the normalization of the models. Here
we use the data... | 1994-07-24 | 2009-09-25 | [
"astro-ph"
] | Douglas Scott and Martin White |
astro-ph/9407072 | Tests of General Relativity at Large Distances and Dark Matter - | The most simple observed cases of gravitational lensing of distant quasars
and galaxies by galaxies and clusters of galaxies are used to test Einstein's
theory of General Relativity and Newtonian Gravity over galactic and
intergalactic distances. They extend the distance range over which
Newton-Einstein Gravity has bee... | 1994-07-24 | 2009-09-25 | [
"astro-ph"
] | Arnon Dar |
astro-ph/9407066 | The Formation of Disk Galaxies in a Cosmological Context: Structure and
Kinematics | We present results concerning the internal structure and kinematics of disk
galaxies formed in cosmologically motivated simulations. The calculations
include dark matter, gas dynamics, radiative cooling, star formation, supernova
feedback and metal enrichment. The initial model is a rigidly rotating
overdense sphere wi... | 1994-07-22 | 2015-06-24 | [
"astro-ph"
] | Matthias Steinmetz & Ewald Mueller |
astro-ph/9407068 | A Faint Luminous Halo that May Trace the Dark Matter around Spiral
Galaxy NGC~5907 | The presence of unseen halos of ``dark matter'' has long been inferred from
the high rotation speeds of gas and stars in the outer parts of spiral
galaxies$^{1}$. The volume density of this dark matter decreases less quickly
from the galactic center than does that of the luminous mass (such as that in
stars), meaning t... | 1994-07-22 | 2009-10-22 | [
"astro-ph"
] | Penny D. Sackett, Heather L. Morrison, Paul Harding, and Todd A.
Boroson |
astro-ph/9407070 | First Observations of Individual Molecular Clouds in the Irregular
Galaxy NGC 6822 | Three molecular clouds have been mapped in the nearby metal-poor dwarf
irregular galaxy NGC 6822 using the Owens Valley Millimeter-Wave
Interferometer. Based on upper limits to the virial masses of the clouds, the
CO-to-H2 conversion factor in NGC 6822 is <2.2+/-1.3 times larger than the
Galactic value. Conversion fact... | 1994-07-22 | 2009-10-22 | [
"astro-ph"
] | C. D. Wilson |
astro-ph/9407069 | Cosmological-Constant Cold Dark Matter Models and the COBE Two-Year Sky
maps | We compare the two-year COBE DMR sky maps with the predictions of
cosmological-constant cold dark matter models. Using a Bayesian analysis, we
find that the most likely value of the cosmological constant in such a model is
Lambda = 0. The data set an upper limit on Lambda of 0.78 (0.85) at 90%
confidence, and 0.86 (0.9... | 1994-07-22 | 2009-10-22 | [
"astro-ph"
] | Emory F. Bunn and Naoshi Sugiyama |
astro-ph/9407067 | X--Ray Spectra from Neutron Stars Accreting at Low Rates | The spectral properties of X--ray radiation produced in a static atmosphere
around a neutron star accreting at very low rates are investigated. Previous
results by Alme \& Wilson (1973) are extended to the range $10^{-7}\leq
L/L_{Edd}\leq 10^{-3}$ to include the typical luminosities, $L\sim
10^{31}-10^{32} \ {\rm ergs\... | 1994-07-22 | 2009-10-22 | [
"astro-ph"
] | Luca Zampieri, Roberto Turolla, Silvia Zane and Aldo Treves |
astro-ph/9407065 | Stars within the Large Magellanic Cloud as Potential Lenses for Observed
Microlensing Events | Massive Compact objects in the halo, known as MACHOs, have been postulated as
the origin of a substantial fraction of `dark matter' known to exist in the
haloes of galaxies$^{1,2}$. Paczy\'nski$^3$ has suggested that it might
possible to detect these low-luminosity objects by their potential to act as
gravitational len... | 1994-07-21 | 2015-06-24 | [
"astro-ph"
] | Kailash C. Sahu |
astro-ph/9407064 | The Effects of Electro-weak Phase Transition Dynamics on Baryogenesis
and Primordial Nucleosynthesis | The evolution of the electro-weak phase transition, including reheating due
to the release of latent heat in shock waves, is calculated for various values
of as yet unknown parameters of electro-weak theory such as latent heat and
bubble wall surface tension. We show that baryon production, which occurs in
the vicinity... | 1994-07-21 | 2010-11-01 | [
"astro-ph"
] | Andrew F. Heckler |
astro-ph/9407063 | The Dynamics of Flux Tubes in a High Beta Plasma | We suggest a new model for the structure of a magnetic field embedded high
$\beta$ turbulent plasma, based on the popular notion that the magnetic field
will tend to separate into individual flux tubes. We point out that
interactions between the flux tubes will be dominated by coherent effects
stemming from the turbule... | 1994-07-21 | 2007-05-23 | [
"astro-ph"
] | E.T. Vishniac |
astro-ph/9407060 | First Order Inflation in General Relativity | I give a general formulation of the constraints on models of inflation ended
by a first order phase transition arising from the requirement that they do not
produce too many large (observable) true vacuum voids -- the `big bubble
problem'. It is shown that this constraint can be satisfied by a simple model
in Einstein ... | 1994-07-20 | 2009-10-22 | [
"astro-ph"
] | David Wands |
astro-ph/9407055 | Studying Starlight from Distant Galaxies with SIRTF | Starlight from distant galaxies ($z > 3$) is redshifted into the near
infrared band with observed wavelengths from 2-8 $\mu$m. Most of the light is
emitted by stars that have a peak emission at the 1.6 $\mu$m wavelength of the
minimum of the H$^-$ opacity. We present simulated images of galaxy and star
fields at 3, 4.7... | 1994-07-20 | 2008-02-03 | [
"astro-ph"
] | E. L. Wright, P. E. Eisenhardt and G. G. Fazio |
astro-ph/9407057 | The Hot End of Evolutionary Horizontal Branches | In this paper we investigate the hot end of the HB, presenting evolutionary
constraints concerning the CM diagram location and the gravity of hot HB stars.
According to the adopted evolutionary scenario, we predict an upper limit for
HB temperatures of about logTe = 4.45, remarkably cooler than previous
estimates. We f... | 1994-07-20 | 2009-10-22 | [
"astro-ph"
] | V.Castellani, S. Degl'Innocenti and L. Pulone |
astro-ph/9407058 | HB Morphology and Age Indicators for Metal-Poor Stellar Systems with Age
in the Range of 1 to 20 Gyr | Isochrone computations and horizontal branch (HB) models for Y(MS)=0.23 and
two values of Z (0.0001, 0.0004)are used to derive constraints on the age
indicators and HB morphology of metal-poor clusters with age t (in Gyrs) in the
range of 1< t < 20.It is found that for fixed metallicity the luminosity
L(3.83) of the ze... | 1994-07-20 | 2007-05-23 | [
"astro-ph"
] | F. Caputo, S. Degl'Innocent |
astro-ph/9407062 | Cosmic Microwave Background Anisotropies and the Geometry of the
Universe | In this talk, I review some recent work on cosmic microwave background (CMB)
anisotropies in an open universe. I emphasize that the observed CMB
anisotropies are still consistent with a low value of $\Omega$, and I address
the question of whether future CMB measurements will be able to provide
information on the geomet... | 1994-07-20 | 2007-05-23 | [
"astro-ph",
"hep-ph"
] | Marc Kamionkowski |
astro-ph/9407061 | The Case for a Hubble Constant of 30 km/s/Mpc | Although cosmologists have been trying to determine the value of the Hubble
constant for nearly 65 years, they have only succeeded in limiting the range of
possibilities: most of the current observational determinations place the
Hubble constant between 50 km/s/Mpc and 90 km/s/Mpc. The uncertainty is
unfortunate becaus... | 1994-07-20 | 2009-10-22 | [
"astro-ph"
] | J.G. Bartlett, A. Blanchard, J. Silk and M.S. Turner |
astro-ph/9407059 | Physically Detached "Compact Groups" | A small fraction of galaxies appear to reside in dense compact groups, whose
inferred crossing times are much shorter than a Hubble time. These short
crossing times have led to considerable disagreement about the dynamical state
of these systems. We suggest that many of the observed groups are not
physically bound but ... | 1994-07-20 | 2009-10-22 | [
"astro-ph"
] | Lars Hernquist, Neal Katz, and David Weinberg |
astro-ph/9407056 | COBE Tutorial and Recent Results | Some of the technical details involved in taking and analyzing data from COBE
are discussed, and recent results from the FIRAS and DMR experiments are
summarized. Some of the cosmological implications of these recent data are
presented. | 1994-07-20 | 2007-05-23 | [
"astro-ph"
] | Edward L. Wright |
astro-ph/9407054 | A Local View of the Observable Universe | We present results on the non-linear dynamics of inhomogeneous cosmological
models with irrotational dust and a positive cosmological constant,
considering, in particular, a wide class with vanishing magnetic Weyl tensor.
For those patches of the universe that do not recollapse to a singularity we
find a unique attract... | 1994-07-18 | 2009-10-22 | [
"astro-ph"
] | M.Bruni, S. Matarrese and O. Pantano |
astro-ph/9407052 | A Mapping for the Gravitational Few-Body Problem with Dissipation | Recently a new class of numerical integration methods -- ``mixed variable
symplectic integrators'' -- has been introduced for studying long-term
evolution in the conservative gravitational few-body problem. These integrators
are an order of magnitude faster than conventional ODE integration methods.
Here I present a si... | 1994-07-16 | 2009-10-22 | [
"astro-ph",
"chao-dyn",
"nlin.CD"
] | Renu Malhotra (Lunar & Planetary Institute) |
astro-ph/9407047 | M_1 - M* Correlation in Galaxy Clusters | Photographic F band photometry of a sample of 36 Abell clusters has been used
to study the relation between the magnitude $M_1$ of the brightest cluster
member and the Schechter function parameter $M^*$. Clusters appear segregated
in the $M_1$-$M^*$ plane according to their Rood \& Sastry class. We prove on a
statistic... | 1994-07-15 | 2007-05-23 | [
"astro-ph"
] | D. Trevese, G. Cirimele and B. Appodia |
astro-ph/9407051 | Temperature Anisotropies in a Universe with Global Defects | We present a technique of calculating microwave anisotropies from global
defects in a reionised universe. We concentrate on angular scales down to one
degree where we expect the nongaussianity of the temperature anisotropy in
these models to become apparent. | 1994-07-15 | 2007-05-23 | [
"astro-ph"
] | David Coulson |
astro-ph/9407046 | Skewness of CMB Anisotropies in an Inflationary Isocurvature Baryon
Model | We investigate the cosmic variance of the skewness of the cosmic microwave
background (CMB) anisotropies in an inflationary model which leads to the
baryon isocurvature scenario for the cosmic structure formation. In this model,
the baryon number fluctuations are given by a sinusoidal function of a random
Gaussian fiel... | 1994-07-15 | 2016-08-30 | [
"astro-ph"
] | Kazuhiro Yamamoto and Misao Sasaki |
astro-ph/9407048 | How Many Solar Neutrino Experiments Are Wrong? | Ten recently-published solar models give $\7be$ neutrino fluxes that lie
within a range of $\pm 10$\% of the average value, a convergence that is
independent of uncertainties in the measured laboratory rate of the
$\7be(p,\gamma)\8b$ reaction. If nothing happens to solar neutrinos after they
are created ({\it a la} sta... | 1994-07-15 | 2008-11-26 | [
"astro-ph"
] | John N. Bahcall |
astro-ph/9407053 | A Gauss-Hermite Expansion of the Galactic Globular Cluster Luminosity
Function | We decompose the luminosity function of Galactic globular clusters into a sum
of the orthogonal Gauss-Hermite functions. This method quantifies the
asymmetric third-order ($h_3$) and symmetric fourth-order ($h_4$) terms of the
distribution while minimizing the effect of outliers in the data. For 138
Galactic globulars ... | 1994-07-15 | 2009-10-22 | [
"astro-ph"
] | Roberto G. Abraham and Sidney Van Den Bergh (Dominion Astrophysical
Observatory Herzberg Institute of Astrophysics National Research Council
Canada Victoria, BC, V8X 4M6, Canada) |
astro-ph/9407049 | Redshift Distortions of Clustering: A Lagrangian Approach | We study the effects of peculiar velocities on statistical measures of galaxy
clustering. These effects occur when distances to the galaxies are estimated
from their redshifts. It is assumed that the clustering pattern results from
the gravitational instability of initially Gaussian, small-amplitude
perturbations of a ... | 1994-07-15 | 2011-05-23 | [
"astro-ph"
] | E. Hivon, F.R. Bouchet, S. Colombi, R. Juszkiewicz |
astro-ph/9407050 | On the Shape of the First Collapsed Objects | Since the early seventies, there was a conjecture that the first collapse of
a selfgravitating dust--like medium (appropriate approximation for nonbaryonic
dark matter) results in the formation of a ``pancake" object, that is a thin
surface. The conjecture has been based on the Zel'dovich approximate solution
of the no... | 1994-07-15 | 2009-10-22 | [
"astro-ph",
"gr-qc"
] | S.F. Shandarin, A.L. Melott, K. McDavitt, J.L. Pauls, J. Tinker |
astro-ph/9407043 | The Supernova Ring Revisited II: Distance to the LMC | I derive an upper limit to the distance to SN 1987A of $\dsn<46.77\pm
0.76\,\kpc$, or a distance modulus $\mu_\sn<18.350\pm 0.035$. If SN 1987A lies
in the plane of the Large Magellanic Cloud (LMC) and hence 500 pc in front of
the LMC center, this implies $\mu_\lmc<18.37\pm 0.04$. The determination rests
on a new measu... | 1994-07-14 | 2009-10-22 | [
"astro-ph"
] | Andrew Gould |
astro-ph/9407041 | Scaling Analysis of the Galaxy Distribution in the SSRS Catalog | A detailed analysis of the galaxy distribution in the Southern Sky Redshift
Survey (SSRS) by means of the multifractal or scaling formalism is presented.
It is shown that galaxies cluster in different ways according to their
morphological type as well as their size. Ellipticals are more clustered than
spirals, even at ... | 1994-07-14 | 2009-10-22 | [
"astro-ph"
] | A. Campos, R. Dominguez-Tenreiro and G. Yepes |
astro-ph/9407039 | Gamma Ray Bursts from Minijets | Striking similarities exist between high energy gamma ray emission from
active galactic nuclei (AGN) and gamma ray bursts (GRBs). They suggest that
GRBs are generated by inverse Compton scattering from highly relativistic
electrons in transient jets. Such jets may be produced along the axis of an
accretion disk formed ... | 1994-07-14 | 2009-10-22 | [
"astro-ph"
] | Nir J. Shaviv and Arnon Dar |
astro-ph/9407044 | Signal-to-Noise Eigenmode Analysis of the Two-Year COBE Maps | To test a theory of cosmic microwave background fluctuations, it is natural
to expand an anisotropy map in an uncorrelated basis of linear combinations of
pixel amplitudes --- statistically-independent for both the noise and the
signal. These $S/N$-eigenmodes are indispensible for rapid Bayesian analyses of
anisotropy ... | 1994-07-14 | 2009-01-23 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | J. Richard Bond |
astro-ph/9407040 | Mutated Hybrid Inflation | A new model of inflation is described. An unusual form for the inflationary
potential is obtained because the inflaton corresponds to a non-trivial path in
the configuration space of the two real scalar fields of the model. The model
predicts a spectral index $n = 1 - 3/2N \simeq 0.97$ for the density
perturbations and... | 1994-07-14 | 2009-10-22 | [
"astro-ph",
"hep-ph"
] | Ewan D. Stewart |
astro-ph/9407042 | Cosmic Microwave Background Radiation Anisotropy Induced by Cosmic
Strings | We report on a current investigation of the anisotropy pattern induced by
cosmic strings on the cosmic microwave background radiation (MBR). We have
numerically evolved a network of cosmic strings from a redshift of $Z = 100$ to
the present and calculated the anisotropies which they induce. Based on a
limited number of... | 1994-07-14 | 2007-05-23 | [
"astro-ph"
] | B. Allen, R. R. Caldwell, E. P. S. Shellard, A. Stebbins, and S.
Veeraraghavan |
astro-ph/9407038 | Giant Branch Mixing and the Ultimate Fate of Primordial Deuterium in the
Galaxy | The observed cosmic abundances of light elements are most consistent with
each other, and with the predictions of big bang nucleosynthesis,if, contrary
to the usual assumption, galactic chemical evolution reduces $(D+\ ^3He)/H$
with time. Chemical evolution models which do this require that low mass stars
destroy $^3He... | 1994-07-13 | 2009-10-22 | [
"astro-ph"
] | Craig J. Hogan |
astro-ph/9407037 | Detectability of Tensor Perturbations Through CBR Anisotropy (final
published version) | Detection of the tensor perturbations predicted in inflationary models is
important for testing inflation as well as for reconstructing the inflationary
potential. We show that because of cosmic variance the tensor contribution to
the square of the CBR quadrupole anisotropy must be greater than about 20\% of
the scalar... | 1994-07-13 | 2009-09-25 | [
"astro-ph"
] | Lloyd Knox and Michael S. Turner |
astro-ph/9407036 | Cosmological Observations in a Local Void | A local void in the globally Friedmann-Robertson-Walker (FRW) cosmological
model is studied. The inhomogeneity is described using the
Lema\^{\i}tre-Tolman-Bondi (LTB) solution with the spherically symmetric matter
distribution based on the faint galaxies number counts. We investigate the
effects this has on the measure... | 1994-07-13 | 2009-10-22 | [
"astro-ph"
] | J.W.Moffat and D.C.Tatarski |
astro-ph/9407034 | On Constraining Electroweak-Baryogenesis with Inhomogeneous Primordial
Nucleosynthesis | Primordial nucleosynthesis calculations are shown to be able to provide
constraints on electroweak baryogenesis which produce a highly inhomogeneous
distribution of the baryon-to-photon ratio. Such baryogenesis scenarios
overproduce 4He and/or 7Li and can be ruled out whenever a fraction
f<3*10e-6(100 GeV/T)^3 of nucle... | 1994-07-12 | 2009-10-22 | [
"astro-ph",
"hep-ph"
] | G.M. Fuller, K. Jedamzik, G.J. Mathews, and A. Olinto |
astro-ph/9407033 | The Angular Correlation Function of Galaxies in CDM and CHDM Models | We estimate the angular correlation function for the standard CDM, tilted
$n=0.7$ CDM and hybrid (CHDM) models, and compare with observations. When
compared with the APM observational results scaled to the Lick depth, there
appears to be fair agreement with the estimate from the CHDM model. But a more
detailed comparis... | 1994-07-12 | 2007-05-23 | [
"astro-ph"
] | G. Yepes, A. Klypin, A. Campos and R. Fong |
astro-ph/9407032 | Steps towards Nonlinear Cluster Inversion Through Gravitational
Distortions. I. Basic Considerations and Circular Clusters | The distortion of images of faint, high-redshift galaxies by light deflection
at foreground clusters of galaxies can be used to determine the (projected)
mass distribution of the clusters. In the case of strong distortions, which
lead to arcs in clusters, the position of the arc and/or its radius of
curvature yields an... | 1994-07-12 | 2007-05-23 | [
"astro-ph"
] | Peter Schneider and Carolin Seitz |
astro-ph/9407035 | Absence of a Lower Limit on Omega_b in Inhomogeneous Primordial
Nucleosynthesis | We show that a class of inhomogeneous big bang nucleosynthesis models exist
which yield light-element abundances in agreement with observational
constraints for baryon-to-photon ratios significantly smaller than those
inferred from standard homogeneous big bang nucleosynthesis (HBBN). These
inhomogeneous nucleosynthesi... | 1994-07-12 | 2009-10-22 | [
"astro-ph"
] | K. Jedamzik, G.J. Mathews, and G.M. Fuller |
astro-ph/9407028 | The Quasar Distribution in a Static Universe | A crucial test of any cosmological model is the distribution of distant
objects such as quasars. Because of well defined selection criteria quasars
found by a ultraviolet excess (UVX) survey are ideal candidates for testing the
model out to a redshift of z = 2.2. The static cosmology proposed by Crawford
(1993) is used... | 1994-07-11 | 2009-10-22 | [
"astro-ph"
] | David F. Crawford |
astro-ph/9407031 | The Radio Lifetime of Supernova Remnants and the Distribution of Pulsar
Velocities at Birth | We have made VLA images of the fields around three young pulsars which have
resulted in the discovery of two new supernova remnants and confirmation of a
third. We argue that, in at least two cases and perhaps the third, the pulsars
are physically associated with these supernova remnants. A review of all known
young pu... | 1994-07-11 | 2009-10-22 | [
"astro-ph"
] | D. A. Frail, W. M. Goss, and J. B. Z. Whiteoak |
astro-ph/9407029 | Angular Size in a Static Universe | In principle the geometry of the universe can be investigated by measuring
the angular size of known objects as a function of distance. Thus the
distribution of angular sizes provides a critical test of the stable and static
model of the universe described by Crawford (1991,1993) that has a simple and
explicit relation... | 1994-07-11 | 2009-10-22 | [
"astro-ph"
] | David F. Crawford |
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