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/9509149 | Baryonic Dark Halos: Machos and Cold Gas? | We consider the possibility that the dark matter in the halos of galaxies may
be in the form of clusters of \macho s within which are embedded cold, dense
gas clouds. Microlensing experiments have found evidence that the Galactic halo
contains up to half of its mass in the form of low-mass \macho s. A number of
observa... | 1995-09-29 | 2009-10-28 | [
"astro-ph"
] | Ortwin Gerhard (Astron.Inst., Univ.Basel, CH) and Joseph Silk
(Dpt.Astron.&Phys., Univ.Calif., Berkeley, USA) |
astro-ph/9509152 | On the Validity of the Classical Apsidal Motion Formula for Tidal
Distortion | We check the validity of the widely used classical apsidal motion formula as
a function of orbital parameters, stellar structure, and stellar rotation rate
by comparing dynamical calculations of the periastron advance with the static
tidal formula. We find that the classical formula gives very accurate results
when the... | 1995-09-29 | 2016-08-30 | [
"astro-ph"
] | Eliot Quataert, Pawan Kumar, and Chi On Ao (MIT) |
astro-ph/9509151 | High-Latitude Galactic Emission in the COBE DMR Two-Year Sky Maps | We cross-correlate the COBE-DMR 2-year sky maps with spatial templates from
long-wavelength radio surveys and the far-infrared COBE DIRBE maps. We place an
upper limit on the spectral index of synchrotron radiation beta_{synch} < -2.9
between 408 MHz and 31.5 GHz. We obtain a statistically significant
cross-correlation... | 1995-09-29 | 2007-05-23 | [
"astro-ph"
] | A. Kogut, A.J. Banday, C.L. Bennett, K.M. Gorski, G. Hinshaw, and W.T.
Reach |
astro-ph/9509148 | The Baryon Fraction and Velocity--Temperature Relation in Galaxy
Clusters : Models versus Observations | The observed baryon fraction and velocity--temperature relation in clusters
of galaxies are compared with hydrodynamic simulations in two cosmological
models : standard (Omega = 1) and a low-density flat (Omega=0.45 and
\lambda=0.55) CDM models, normalized to the COBE background fluctuations. The
observed properties of... | 1995-09-28 | 2009-10-28 | [
"astro-ph"
] | Lori M. Lubin, Renyue Cen, Neta A. Bahcall & Jeremiah P. Ostriker
(Princeton University Observatory) |
astro-ph/9509147 | Cold + Hot Dark Matter and the Cosmic Microwave Background | We examine the cosmic microwave background power spectrum for adiabatic
models with a massive neutrino component. We present the results of a detailed
numerical evolution of cold + hot dark matter (CHDM) models and compare with
the standard cold dark matter (CDM) spectrum. The difference is of order
$5-10%$ for $400 < ... | 1995-09-28 | 2009-10-28 | [
"astro-ph"
] | Scott Dodelson, Evalyn Gates, Albert Stebbins |
astro-ph/9509145 | Mixed Dark Matter Model in Halos of Clusters | We discuss the structure of clusters in a class of flat cosmological models
with the fraction of mass \Omega_{CDM} ~0.8 in cold dark matter, and the rest
in hot dark matter in the form of massive neutrinos. We consider such Cold+Hot
Dark Matter (CHDM) models with one, two or three massive neutrinos, with total
mass ~4.... | 1995-09-28 | 2009-10-28 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | Lev Kofman, Anatoly Klypin, Dmitri Pogosyan and J.Patrick Henry |
astro-ph/9509146 | Observationnal constraints on the nature of the low redshift Lyman-alpha
absorbers | We present results from a spectroscopic and imaging survey of galaxies in the
fields of quasars from the HST Quasar Absorption Line Key Project. The aim of
this survey is to identify galaxies within 3.5' from the quasar sightline, to a
limiting r-band magnitude mr = 22.5. The data are then compared to the HST
homogeneo... | 1995-09-28 | 2007-05-23 | [
"astro-ph"
] | V. Le Brun (Institut d'Astrophysique de Paris), J. Bergeron (E.S.O.,
I.A.P.), P. Boisse (Ecole Normale Superieure de Paris) |
astro-ph/9509144 | The Dynamics and Outcomes of Rapid Infall onto Neutron Stars | We present an extensive study of accretion onto neutron stars in which the
velocity of the neutron star and structure of the surrounding medium is such
that the Bondi-Hoyle accretion exceeds .001 Msun/y. For most cases,
hypercritical accretion due to rapid neutrino cooling allows the neutron star
to accrete above the B... | 1995-09-27 | 2016-08-30 | [
"astro-ph"
] | Chris L. Fryer, Willy Benz (Steward Observatory), and Marc
Herant(LANL) |
astro-ph/9509140 | Advection-Dominated Accretion Model of Sagittarius A$^*$ and Other
Accreting Black Holes | Viscous rotating accretion flows around black holes become
advection-dominated when the accretion rate $\dot M$ is sufficiently low. Most
of the accretion energy in such flows is stored within the gas and advected
radially inward. The temperature is therefore very high, and much of the
radiation comes out in hard X-ray... | 1995-09-27 | 2011-05-23 | [
"astro-ph"
] | Ramesh Narayan, Insu Yi, and Rohan Mahadevan |
astro-ph/9509138 | Cyclo-Synchrotron Emission and Comptonization in Optically Thin Hot
Accretion Flows | Soft cyclo-synchrotron photons produced by thermal electrons moving in a
magnetic field can be subsequently Comptonized to produce hard X-ray and
$\gamma$-ray emission. An accurate determination of the amount of soft
cyclo-synchrotron photons produced from such plasmas is clearly necessary. We
present the complete solu... | 1995-09-27 | 2007-05-23 | [
"astro-ph"
] | Rohan Mahadevan |
astro-ph/9509143 | Galaxy Dynamics Predictions in the Nonsymmetric Gravitational Theory | In the weak field approximation, the nonsymmetric gravitational theory (NGT)
has, in addition to the Newtonian gravitational potential, a Yukawa-like
potential produced by the exchange of a spin $1^+$ boson between fermions. If
the range $r_0=\mu^{-1}$ is $25$ kpc, then this additional potential due to the
interaction ... | 1995-09-27 | 2010-11-30 | [
"astro-ph",
"gr-qc"
] | J. W. Moffat and I. Yu. Sokolov |
astro-ph/9509133 | Application of Millisecond Pulsar Timing to the Long-Term Stability of
Clock Ensembles | Terrestrial timescales show instabilities due to the physical limitations of
the atomic clocks. Stricter environmental isolation and increased numbers of
improved cesium clocks and cavity-tuned hydrogen masers have resulted in time
scales more accurate by a factor of about five. The use of different clock
ensembles res... | 1995-09-27 | 2007-05-23 | [
"astro-ph"
] | Demetrios N. Matsakis, Roger S. Foster |
astro-ph/9509136 | Cosmic Metal Production and the Contribution of QSO Absorption Systems
to the Ionizing Background | The recent discovery by Cowie \etal and Tytler \etal of metals in the \Lya
clouds shows that the intergalactic medium (IGM) at high redshift is
contaminated by the products of stars, and suggests that ionizing photons from
massive star formation may be a significant contributor to the UV background
radiation at early e... | 1995-09-27 | 2009-10-28 | [
"astro-ph"
] | Piero Madau and J. Michael Shull |
astro-ph/9509137 | Consequences of Dust in Metal-Rich HII Regions | Dust and associated depletion of heavy elements from the gas phase can modify
the thermal properties of HII regions from the dust-free case, with significant
consequences for the emergent optical spectrum. We present the results of
theoretical calculations illustrating the effects of grains on the spectra of
giant, ext... | 1995-09-27 | 2009-10-28 | [
"astro-ph"
] | Joseph C. Shields, Robert C. Kennicutt (Steward Observatory) |
astro-ph/9509141 | The Phase Space Structure Near Neptune Resonances in the Kuiper Belt | The Solar system beyond Neptune is believed to house a population of small
primordial bodies left over from the planet formation process. The region up to
heliocentric distance $\sim 50 AU$ (a.k.a. the Kuiper Belt) may be the source
of the observed short period comets. In this region, the phase space structure
near orb... | 1995-09-27 | 2009-10-28 | [
"astro-ph"
] | Renu Malhotra (Lunar and Planetary Institute) |
astro-ph/9509142 | The 1979, March 5 Gamma-Ray Transient: Was it a Classic Gamma-Ray Burst? | The March 5th, 1979 gamma-ray transient has long been thought to be
fundamentally different from the classic gamma-ray bursts (GRBs). It had
recurrences, pulsations, and a soft spectral component unlike classic GRBs.
With the exception of the soft component reported from the Konus experiment,
the unusual characteristic... | 1995-09-27 | 2009-10-28 | [
"astro-ph"
] | E.E. Fenimore, R.W. Klebesadel, and J.G. Laros (Los Alamos National
Laboratory) |
astro-ph/9509139 | Models of Quiescent Black Hole Neutron Star Soft X-Ray Transients | When the mass accretion rate onto a black hole (BH) falls below a critical
rate, ${\dot M}_{crit}\sim \alpha^2 {\dot M}_{Edd}$, accretion can occur via a
hot optically thin flow where most of the dissipated energy is advected inward.
We present such an advection-dominated model for the soft X-ray transient (SXT)
A0620-... | 1995-09-27 | 2011-05-23 | [
"astro-ph"
] | Insu Yi, Ramesh Narayan, Didier Barret, & Jeffrey E. McClintock |
astro-ph/9509130 | Spectrum of the Supernova Relic Neutrino Background and Evolution of
Galaxies | The spectrum of the supernova relic neutrino background (SRN) from
collapse-driven supernovae ever occurred in the universe is calculated by using
a realistic, time-dependent supernova rate derived from a standard model of
galaxy evolution based on the population synthesis method. The SRN spectrum we
show here is the m... | 1995-09-26 | 2010-11-30 | [
"astro-ph"
] | Tomonori Totani, Katsuhiko Sato, and Yuzuru Yoshii (the University of
Tokyo) |
astro-ph/9509135 | Does the Crab Have a Shell? | We present deep images of a region around the Crab nebula made with the VLA,
utilizing new imaging and deconvolution algorithms in a search for a faint
radio shell. The existence of a high-velocity, hydrogen-rich envelope has been
predicted to account for the low total mass and kinetic energy of the observed
nebula. No... | 1995-09-26 | 2009-10-28 | [
"astro-ph"
] | D.A. Frail, N.E. Kassim, T.J. Cornwell and W.M. Goss |
astro-ph/9509134 | Differential neutrino heating and reduced $^4$He production from
decaying particles in the early universe | A decaying particle that dominates the energy density of the universe and
then decays with a lifetime $\sim 10^{-1}$ sec into
electromagnetically-interacting particles can heat the background electron
neutrinos more than the $\mu$ and $\tau$ neutrinos, resulting in a decrease in
the primordial $^4$He abundance. Previou... | 1995-09-26 | 2007-05-23 | [
"astro-ph"
] | Richard E. Leonard and Robert J. Scherrer (Ohio State University) |
astro-ph/9509129 | Nonlinear Evolution of Genus in Primordial Random-Gaussian Density Field | The genus statistics is studied using large $N$-body simulations for several
cosmological models. We consider the effects of nonlinear gravitational
evolution, smoothing the particle data in fully nonlinear regime, and the
redshift-space distortion on the genus curve. Detailed comparison between the
theoretical predict... | 1995-09-26 | 2009-10-28 | [
"astro-ph"
] | Takahiko Matsubara and Yasushi Suto (the University of Tokyo) |
astro-ph/9509131 | Stellar Populations of Bulges and Disks: New Insights from Near-IR
Colours | Colours of spiral galaxies generally are affected by the underlying old
stellar population, younger stars, and extinction by dust. Old and young
populations generally can be disentangled using a combination of blue and
near-infrared colours. Extinction effects are very hard to take into account,
except for galaxies wit... | 1995-09-26 | 2019-07-31 | [
"astro-ph"
] | R.F. Peletier and M. Balcells (Kapteyn Instituut, Groningen, NL) |
astro-ph/9509126 | Big Bang Nucleosynthesis Constraints on Primordial Magnetic Fields | We reanalyze the effect of magnetic fields in BBN, incorporating several
features which were omitted in previous analyses. We find that the effects of
coherent magnetic fields on the weak interaction rates and the electron
thermodynamic functions (\rhoe, \Pe, and \drhoedt ) are unimportant in
comparison to the contribu... | 1995-09-25 | 2014-10-13 | [
"astro-ph"
] | Peter. J. Kernan, Glenn D. Starkman and Tammay Vachaspati (CWRU) |
astro-ph/9509125 | VLBI Observations of the Gravitational Lens System 0957+561 | We present hybrid maps of the A and B images of 0957+561 from each of four
sessions of 6 cm VLBI observations that span the six-year interval 1987-1993.
The inner- and outer-jets are clearly detected, and confirm the structures
reported previously. There is no evidence of change in the separation between
the core and i... | 1995-09-25 | 2009-10-28 | [
"astro-ph"
] | R.M.Campbell, J.Lehar (CfA), B.E.Corey (Haystack), I.I.Shapiro,
E.E.Falco (CfA) |
astro-ph/9509127 | Gravitational Microlensing by Clustered MACHOs | It has been proposed that the MACHOs in our galaxy could be clumped in
globular cluster--like associations or RAMBOs (robust associations of massive
baryonic objects) (Moore \& Silk 1995). Here we investigate the effect such
clustering has on the microlensing of stars in the Large Magellanic Cloud. We
find that the len... | 1995-09-25 | 2015-06-24 | [
"astro-ph"
] | R Benton Metcalf and Joseph Silk (UC Berkeley) |
astro-ph/9509128 | Photoionization and the Formation of Dwarf Galaxies | It has been argued that a UV photoionizing background radiation field
suppresses the formation of dwarf galaxies, and may even inhibit the formation
of larger galaxies. In order to test this, we present gas-dynamical simulations
of the formation of small objects in a CDM universe with and without a
photoionizing backgr... | 1995-09-25 | 2016-06-08 | [
"astro-ph"
] | Thomas Quinn (U. Washington), Neal Katz (U. Washington), and George
Efstathiou (Oxford) |
astro-ph/9509121 | A new spherically symmetric general relativistic hydrodynamical code | In this paper we present a full general relativistic one-dimensional
hydro-code which incorporates a modern high-resolution shock-capturing
algorithm, with an approximate Riemann solver, for the correct modelling of
formation and propagation of strong shocks. The efficiency of this code in
treating strong shocks is dem... | 1995-09-25 | 2009-10-28 | [
"astro-ph"
] | Jose V. Romero(Univ. Valencia, Dpto Fisica Teorica), Jose M. Ibanez,
Jose M. Marti and Juan A. Miralles (Univ. Valencia, Dpto Astronomia y
Astrofisica) |
astro-ph/9509122 | Analytical Models For Galactic Nuclei | I present a general family of dynamical models with simple analytical
potential-density pairs suited to model galactic bulges and nuclei with double
power-law radial density profiles and an optional central black hole.
Analytical expressions for the potential and velocity dispersion of these
models are given in the sph... | 1995-09-25 | 2015-06-24 | [
"astro-ph"
] | HongSheng Zhao (MPA-Garching) |
astro-ph/9509124 | Accurate Evaluation of Fermi-Dirac Integrals and Their Derivatives for
Arbitrary Degeneracy and Relativity | The equation of state of an ideal Fermi gas is expressed in terms of
Fermi-Dirac integrals. We give formulae for evaluation the Fermi-Dirac
integrals of orders 1/2, 3/2, and 5/2 and their derivatives in various limits
of non- and extreme degeneracy and relativity. We provide tables and a Fortran
subroutine for numerica... | 1995-09-25 | 2009-10-28 | [
"astro-ph"
] | Juan Antonio Miralles (Valencia) and Kenneth A. Van Riper (LANL) |
astro-ph/9509123 | Ages of galaxy bulges and disks from optical and near-infrared colours | For a sample of bright nearby early-type galaxies we have obtained surface
photometry in bands ranging from U to K. Since the galaxies have inclinations
larger than 50 deg. it is easy to separate bulges and disks. By measuring the
colours in special regions, we minimize the effects of extinction, and by
looking at B-K ... | 1995-09-25 | 2008-02-03 | [
"astro-ph"
] | R.F. Peletier and M. Balcells (Kapteyn Instituut, Groningen, NL) |
astro-ph/9509117 | A New Method for the Determination of the Hubble Parameter | By chance, the slope of the Mv(max) versus (B-V)max relation for recent
theoretical models of supernovae of Type Ia (SNe Ia) by Hoflich & Khokhlov is
indistinguishable from the slope of a reddening line in the V versus B-V plane.
This coincidence allows one to determine a parameter Mv*(max) for SNe Ia that
is independe... | 1995-09-22 | 2009-10-28 | [
"astro-ph"
] | Sidney van den Bergh |
astro-ph/9509115 | A Lower Limit on the Age of the Universe | We report the results of a detailed numerical study designed to estimate both
the absolute age and the uncertainty in age (with confidence limits) of the
oldest globular clusters. Such an estimate is essential if a comparison with
the Hubble age of the universe is to be made to determine the consistency, or
lack thereo... | 1995-09-22 | 2009-10-28 | [
"astro-ph"
] | Brian Chaboyer, Peter J. Kernan, Lawrence M. Krauss, Pierre Demarque |
astro-ph/9509119 | Some Constraints on Galaxy Evolution Imposed by the Specific Frequency
of Globular Clusters | Early-type dwarf galaxies are found to have high specific globular cluster
frequencies which are similar to the high S values that are observed in
luminous galaxies of types E and S0. It appears unlikely that cluster formation
during mergers between dwarf disk systems can account for the high specific
globular cluster ... | 1995-09-22 | 2009-10-28 | [
"astro-ph"
] | Sidney van den Bergh |
astro-ph/9509116 | Last Hope for an astrophysical solution to the solar neutrino problem | We discuss what appears the last hope for an astrophysical solution to the
solar neutrino problem: a correlated variation of the astrophysical factors for
the helium burning cross sections ($S_{33}$ and $S_{34}$) and either $S_{17}$
or the central temperature $T_c$. In this context, we recognize the important
role play... | 1995-09-22 | 2011-01-04 | [
"astro-ph",
"hep-ph"
] | V. Berezinsky, G. Fiorentini and M. Lissia |
astro-ph/9509118 | Are the Luminosities of RR Lyrae Stars Affected by Second Parameter
Effects? | There is a serious discrepancy between the distance to the LMC derived from
the Cepheid Period-Luminosity relation and that obtained by using the Galactic
calibration for the luminosity of RR Lyrae stars. It is suggested that this
problem might be due to the fact that second parameter effects make it
inappropriate to a... | 1995-09-22 | 2009-10-28 | [
"astro-ph"
] | Sidney van den Bergh |
astro-ph/9509114 | 3D Barred Model of the Milky Way Including Gas | We present a 3D N-body simulation of the Milky Way including 4*10^5 star- and
dark-like particles and 2*10^4 gas particles, initially distributed according
to an axisymmetric, observationally constrained, mass model. The whole system
is self-gravitating and the gas hydrodynamics is solved using the SPH method.
The simu... | 1995-09-22 | 2008-02-03 | [
"astro-ph"
] | R. Fux and D. Friedli |
astro-ph/9509113 | Three-integral oblate galaxy models | A simple numerical scheme is presented for the construction of three-integral
phase-space distribution functions for oblate galaxy models with a
gravitational potential of St\"{a}ckel form, and an arbitrary axisymmetric
luminous density distribution. The intrinsic velocity moments can be obtained
simultaneously with li... | 1995-09-22 | 2015-06-24 | [
"astro-ph"
] | F.H.A. Robijn and P.T. de Zeeuw |
astro-ph/9509107 | Cosmological Simulations with TreeSPH | We describe numerical methods for incorporating gas dynamics into
cosmological simulations and present illustrative applications to the cold dark
matter (CDM) scenario. Our evolution code, a version of TreeSPH (Hernquist \&
Katz 1989) generalized to handle comoving coordinates and periodic boundary
conditions, combines... | 1995-09-21 | 2011-08-31 | [
"astro-ph"
] | Neal Katz (U. Washington), David H. Weinberg (Ohio State), and Lars
Hernquist (U.C. Santa Cruz) |
astro-ph/9509110 | The optical spectrum of HR 4049 (includes a line identification from
3650 to 10850ang) | High-resolution optical spectra (UES/WHT) of the extreme metal-poor post-AGB
star HR4049 were obtained at four different orbital phases. The spectra cover
the wavelength region from 3650ang to 10850ang at a resolution of R=5.2x10^4.
These observations are supplemented with four high-resolution spectra of the
NaI D1 & D... | 1995-09-21 | 2019-08-15 | [
"astro-ph"
] | Eric J. Bakker, Frank L.A. Van der Wolf, Henny J.G.L.M. Lamers, Austin
F. Gulliver, Roger Ferlet, Alfred Vidal-Madjar |
astro-ph/9509112 | Nonlinear Damping of Oscillations in Tidal-Capture Binaries | We calculate the damping of quadrupole f and low order g modes (primary
modes) by nonlinear coupling to other modes of the star. This damping is orders
of magnitude more rapid than direct radiative damping when the primary
amplitude is large, as in tidal capture.
Primary modes destabilize high degree g-modes of half ... | 1995-09-21 | 2016-08-30 | [
"astro-ph"
] | Pawan Kumar (IAS and MIT) and Jeremy Goodman (Princeton) |
astro-ph/9509106 | Damped Lyman-alpha and Lyman Limit Absorbers in the Cold Dark Matter
Model | We study the formation of damped \lya and Lyman limit absorbers in a
hierarchical clustering scenario using a gas dynamical simulation of an $\Omega
= 1$, cold dark matter universe. In the simulation, these high column density
systems are associated with forming galaxies. Damped \lya absorption, $N_{HI}
\simgt 10^{20.2... | 1995-09-21 | 2009-10-28 | [
"astro-ph"
] | Neal Katz (U. Washington), David H. Weinberg (Ohio State), Lars
Hernquist (U.C. Santa Cruz), and Jordi Miralda-Escude (IAS) |
astro-ph/9509105 | The Lyman-alpha Forest in the Cold Dark Matter Model | Cosmological simulations with gas provide a detailed description of the
intergalactic medium, making possible predictions of neutral hydrogen
absorption in the spectra of background QSOs. We present results from a
high-resolution calculation of an $\Omega=1$ cold dark matter model. Our
simulation reproduces many of the... | 1995-09-21 | 2009-10-28 | [
"astro-ph"
] | Lars Hernquist (U.C. Santa Cruz), Neal Katz (U. Washington), David H.
Weinberg (Ohio State), and Jordi Miralda-Escude (IAS) |
astro-ph/9509108 | Dust in High Redshift Radio Galaxies and the Early Evolution of
Spheroidal Galaxies | Several lines of evidence suggest that early-type galaxies might have been
very dusty during their initial evolutionary stages, characterized by intense
star formation activity. The radio selection has provided, by far, the richest
samples of high-$z$ galaxies, most likely of early type, which may therefore
yield cruci... | 1995-09-21 | 2015-06-24 | [
"astro-ph"
] | Paola Mazzei and Gianfranco De Zotti |
astro-ph/9509109 | Field Stars and Clusters of the Galactic Bulge: Implications for Galaxy
Formation | The results of a kinematic study of the Galactic bulge based on spectra of
red giants in fields at projected distances of 1.4-1.8 kpc from the Galactic
center are presented. There is a marked trend of kinematics with metallicity,
in the sense that the more metal-poor population has higher velocity dispersion
and lower ... | 1995-09-21 | 2009-10-28 | [
"astro-ph"
] | Dante Minniti |
astro-ph/9509111 | A study on the nature of the peculiar supergiant HD101584 | We present a study of low- and high-resolution ultraviolet, high-resolution
optical CAT/CES spectra and ultraviolet, optical and infrared photometry of the
peculiar supergiant HD101584. From the photometry we learn that the ultraviolet
and optical energy distribution cannot be fitted in a consistent way and we
need a m... | 1995-09-21 | 2016-08-30 | [
"astro-ph"
] | Eric J. Bakker, Henny J.G.L.M. Lamers, L.B.F.M. Waters, Christoffel
Waelkens, Norman R. Trams, Hans van Winckel |
astro-ph/9509120 | Optical Identification of Quasar 0917+7122 in the Direction of an
Extreme-Ultraviolet Source | We report the optical identification of an $R=18.3$ mag, $z=2.432$ quasar at
the position of a 6 cm radio source and a faint \rosat PSPC X-ray source. The
quasar lies within the error circles of unidentified extreme-UV (EUV)
detections by the \euve and \rosat WFC all-sky surveys at $\sim 400$ \AA\ and
$\sim 150$ \AA, r... | 1995-09-21 | 2007-05-23 | [
"astro-ph"
] | Dan Maoz, Eran Ofek, Amotz Shemi, Aaron Barth, Alexei Filippenko,
Michael Brotherton, Beverley Wills, Derek Wills, and Felix J. Lockman |
astro-ph/9509102 | Wavelet Analysis of One-Dimensional Cosmological Density Fluctuations | Wavelet analysis is proposed as a new tool for studying the large-scale
structure formation of the universe. To reveal its usefulness, the wavelet
decomposition of one-dimensional cosmological density fluctuations is
performed. In contrast with the Fourier analysis, the wavelet analysis has
advantage of its ability to ... | 1995-09-20 | 2009-10-28 | [
"astro-ph"
] | Yoshi Fujiwara and Jiro Soda (Kyoto University) |
astro-ph/9509103 | CCD Photometry of Dwarf Nova AL Com in Superoutburst | We report a CCD optical photometry of a dwarf nova AL Com in superoutburst.
Before superhumps occurred the light curve was highly variable with dominant
periods about 41 minutes and 81.5 minutes for different nights. The period of
observed superhumps is 82.5 minutes and seems to be stable. The first harmonic
of the bas... | 1995-09-20 | 2007-05-23 | [
"astro-ph"
] | W. Pych and A. Olech (Warsaw University Observatory) |
astro-ph/9509104 | Spectrophotometry of globular clusters in NGC5128 | We have carried out spectrophotometry in the range 3600--9700\AA~ of five
globular clusters in NGC 5128 for which previous photometric studies suggested
a high metal content. We compare the equivalent widths of a set of metallic
features of the NGC 5128 clusters with those of well-studied Galactic and M31
globular clus... | 1995-09-20 | 2007-05-23 | [
"astro-ph"
] | Jablonka, Bica, Pelat, Alloin |
astro-ph/9509095 | The host galaxies of z=2 radio-quiet QSOs | Based on an $R$-band imaging survey of high-redshift ($z \approx 2$) QSOs
with the 4.2m WHT, we report the detection of extensions to the nuclear PSFs of
two radio-quiet and one radio-loud QSO. The extensions are most likely host
galaxies, with luminosities of at least $3-7$\% of the QSO luminosity. The most
likely val... | 1995-09-19 | 2007-05-23 | [
"astro-ph"
] | I. Aretxaga, B.J. Boyle, R.J. Terlevich |
astro-ph/9509094 | The observability of old neutron stars accreting the interstellar
medium: III. The solar proximity | Old isolated accreting neutron stars may show up among unidentified soft
X--ray sources detected by the ROSAT All Sky Survey. We argue that the chances
of identification are greater for ONSs located in the closest overdense regions
of the solar neighbourhood. In particular, we consider the neutral hydrogen
wall in the ... | 1995-09-19 | 2007-05-23 | [
"astro-ph"
] | Silvia Zane, Luca Zampieri, Roberto Turolla and Aldo Treves |
astro-ph/9509093 | Radiative Transfer in a Clumpy Universe: II. The Utraviolet
Extragalactic Background | We present a detailed calculation of the propagation of AGN-like ionizing
radiation through the intergalactic space. We model the ionization state of
absorbing clouds, and show that the universe will be more opaque above $4\,$Ryd
than previously estimated. Singly ionized helium in \Lya forest clouds and
Lyman-limit sys... | 1995-09-19 | 2009-10-28 | [
"astro-ph"
] | Francesco Haardt and Piero Madau |
astro-ph/9509097 | The extended narrow line region in Mkn79. I.Observations | We present deep long slit spectra of Mkn79 in position angles PA=12$^{o}$ and
PA=50$^{o}$ obtained with the WHT. These data prove the existence of an
extended narrow line region in PA=12$^{o}$, which coincides with the triplet
radio structure (Ulvestad \& Wilson 1984) and the observed outflow of material
from the nucle... | 1995-09-19 | 2007-05-23 | [
"astro-ph"
] | L.S.Nazarova, P.T.O'Brien and M.J.Ward |
astro-ph/9509092 | Gamow-Teller strength distributions for nuclei in pre-supernova stellar
cores | Electron-capture and $\beta$-decay of nuclei in the core of massive stars
play an important role in the stages leading to a type II supernova explosion.
Nuclei in the f-p shell are particularly important for these reactions in the
post Silicon-burning stage of a presupernova star. In this paper, we
characterise the ene... | 1995-09-19 | 2008-11-26 | [
"astro-ph",
"nucl-th"
] | F. K. Sutaria and A. Ray (Astrophys. Group, Tata Institute, Bombay) |
astro-ph/9509096 | The accretion luminsoity of a massive black hole in an elliptical galaxy | Most large elliptical galaxies should now host a massive black hole leftover
from an earlier quasar phase. Such galaxies also have an extensive hot gaseous
halo. Here we consider why the nuclei of elliptical galaxies are not luminous
sources due to the accretion of the hot gas by the central black hole, yet have
weak r... | 1995-09-19 | 2016-06-08 | [
"astro-ph"
] | A.C. Fabian, M.J. Rees |
astro-ph/9509101 | Spectroscopy of the white-dwarf companions of PSR~0655+64 and 0820+02 | We present spectra of the white-dwarf companions of the radio pulsars 0655+64
and 0820+02. For the latter, we find a spectrum showing strong lines of
hydrogen, i.e., that of a DA star. From modelling these lines, the mass of a
white dwarf can, in principle, be determined accurately, thus leading to
constraints on the e... | 1995-09-19 | 2009-10-28 | [
"astro-ph"
] | M. H. van Kerkwijk and S. R. Kulkarni (Palomar Observatory, Caltech) |
astro-ph/9509099 | Detection of Extended Polarized Ultraviolet Radiation from the z = 1.82
Radio Galaxy 3C 256 | We have detected spatially extended linear polarized UV emission from the
high-redshift radio galaxy 3C~256 ($z=1.82$). A spatially integrated ($7.8''$
diameter aperture) measurement of the degree of polarization of the $V-$band
(rest frame 0.19 $\mu$m) emission yields a value of 16.4\% ($\pm 2.2$\%) with a
position an... | 1995-09-19 | 2009-10-28 | [
"astro-ph"
] | Buell T. Jannuzi, Richard Elston, Gary D. Schmidt, Paul S. Smith, and
H. S. Stockman |
astro-ph/9509091 | Energy Spectra and Elemental Composition of Nuclei above 100 TeV from a
Series of JACEE Balloon Flights | The Japanese-American Cooperative Emulsion Experiment (JACEE) has recently
carried out a series of Antarctic circumpolar balloon flights (JACEE-10 ~
JACEE-13) for the study of high energy elemental composition and energy spectra
of cosmic rays. The total exposure factor of these experiments is 663 m**2-hr,
which is abo... | 1995-09-19 | 2007-05-23 | [
"astro-ph"
] | The JACEE Collaboration: K. Asakimori, et al |
astro-ph/9509098 | The Nature and Evolution of Absorption-Selected Galaxies | We present results of surveys for high redshift galaxies selected by their
having produced detectable Mg~II and Lyman limit absorption in the spectra of
background QSOs. We discuss the properties of the absorbing galaxies, the
connection between galaxy properties and absorption line signatures, and how a
combination of... | 1995-09-19 | 2007-05-23 | [
"astro-ph"
] | C. Steidel (Caltech) |
astro-ph/9509100 | The Discovery of Halley-sized Kuiper Belt Objects Using HST | We report the statistical detection (at the >99% confidence level) of a
population of 28th magnitude objects exhibiting proper motions of ~1 arcsecond
per hour at quadrature in deep HST/WFPC2 images. The drift directions imply a
preponderance of objects on prograde orbits concentrated near the ecliptic
plane. We interp... | 1995-09-19 | 2009-10-28 | [
"astro-ph"
] | Anita L. Cochran (U. Texas), Harold F. Levison, S. Alan Stern (SwRI),
Martin J. Duncan (Queen's U.) |
astro-ph/9509087 | Do OB Runaway Stars Have Pulsar Companions? | We have conducted a VLA search for radio pulsars at the positions of 44
nearby OB runaway stars. The observations involved both searching images for
point sources of continuum emission and a time series analysis. Our mean flux
sensitivity to pulsars slower than 50 ms was 0.2 mJy. No new pulsars were found
in the survey... | 1995-09-18 | 2009-10-28 | [
"astro-ph"
] | Colin J. Philp (UNC-CH), Charles R. Evans (UNC-CH), Peter J.T. Leonard
(UMD) and Dale A. Frail (NRAO-VLA) |
astro-ph/9509090 | Time-Variation of Newton's Constant and the Age of Globular Clusters | A variation of Newton's constant $G$ over cosmological time scales would
modify the main-squence time of globular cluster (GC) stars. We have calculated
the evolution of low-mass stars typical for GCs both for standard non-varying
$G$ and under the assumption of a linear variation of $G$. The age of the
isochrones resu... | 1995-09-18 | 2011-05-23 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | S. Degl'Innocenti, G. Fiorentini, G.G. Raffelt, B. Ricci, and A. Weiss |
astro-ph/9509089 | Lyman Limit Imaging of High Redshift Galaxies. III. New Observations of
4 QSO Fields | We present the results of deep Lyman limit imaging in four new fields as part
of a continuing search for galaxies at $3.0 \le z \le 3.5$. The technique uses
a custom broad--band filter set ($U_n G {\cal R}$) designed to isolate objects
having Lyman continuum breaks superposed on otherwise flat--spectrum
ultraviolet con... | 1995-09-18 | 2009-10-28 | [
"astro-ph"
] | C. Steidel, M. Pettini, D. Hamilton |
astro-ph/9509086 | Genus Statistics of the Large-Scale Structure with Non-Gaussian Density
Fields | As a statistical measure to quantify the topological structure of the
large-scale structure in the universe, the genus number is calculated for a
number of non-Gaussian distributions in which the density field is
characterized by a nontrivial function of some Gaussian-distributed random
numbers. As a specific example, ... | 1995-09-18 | 2009-10-28 | [
"astro-ph"
] | Takahiko Matsubara and Jun'ichi Yokoyama |
astro-ph/9509088 | Far-Infrared Water Line Emissions From Circumstellar Outflows | We have modeled the far-infrared water line emission expected from
circumstellar outflows from oxygen-rich late-type stars, as a function of the
mass-loss rate and the terminal outflow velocity. For each mass-loss rate and
terminal outflow velocity considered, we computed self-consistently the gas
density, temperature,... | 1995-09-18 | 2009-10-28 | [
"astro-ph"
] | Wesley Chen and David A. Neufeld (Johns Hopkins University) |
astro-ph/9509085 | Accretion Discs with Accreting Coronae in AGN - II. Nuclear Wind | We study an accretion disc with a hot continuous corona. We assume that the
corona itself accretes and therefore it is powered directly by the release of
the gravitational energy and cooled by radiative interaction with the disc. We
consider the vertical structure of such a corona and show that the radial
infall is acc... | 1995-09-17 | 2015-06-24 | [
"astro-ph"
] | H.J. Witt, B. Czerny and P.T. Zycki |
astro-ph/9509083 | Atomic data for astrophysics. I. Radiative recombination rates for
H-like, He-like, Li-like and Na-like ions over a broad range of temperature | We present new calculations and analytic fits to the rates of radiative
recombination towards H-like, He-like, Li-like and Na-like ions of all elements
from H through Zn (Z=30). The fits are valid over a wide range of temperature,
from 3 K to 10**9 K. | 1995-09-16 | 2009-10-28 | [
"astro-ph",
"atom-ph"
] | D.A. Verner and G.J. Ferland (University of Kentucky) |
astro-ph/9509080 | Dynamical Search for Substructures in Galaxy Clusters, A Hierarchical
Clustering Method | We propose a new hierarchical method which uses dynamical arguments to find
and describe substructures in galaxy clusters. This method (hereafter h--method
or h--analysis) uses a hierarchical clustering analysis to determine the
relationship between galaxies according to their relative binding energies. We
have tested ... | 1995-09-15 | 2007-05-23 | [
"astro-ph"
] | Arturo Serna (Obs Paris Meudon), Daniel Gerbal (IAP) |
astro-ph/9509078 | BATSE Observations of the Large-Scale Isotropy of Gamma-Ray Bursts | We use dipole and quadrupole statistics to test the large-scale isotropy of
the first 1005 gamma-ray bursts observed by the Burst and Transient Source
Experiment (BATSE). In addition to the entire sample of 1005 gamma-ray bursts,
many subsets are examined. We use a variety of dipole and quadrupole statistics
to search ... | 1995-09-15 | 2009-10-28 | [
"astro-ph"
] | Michael S. Briggs, William S. Paciesas, and Geoffrey N. Pendleton
(UAH), Charles A. Meegan, Gerald J. Fishman, John M. Horack, and Martin Brock
(MSFC), Chryssa Kouveliotou (USRA), Dieter H. Hartmann (Clemson), and Jon
Hakkila (Mankato State) |
astro-ph/9509081 | Environmental effects on the structure of the Dwarf Spheroidal Galaxies | The central surface brightness ($\mu_V(0)$) of the dwarf spheroidal
satellites of our own Galaxy is found to correlate with their distance from the
Galactic Center ($R_{GC}$). This observational evidence suggests that
environmental effects could strongly influence their structure. This suggestion
is further supported b... | 1995-09-15 | 2015-06-24 | [
"astro-ph"
] | M. Bellazzini, F. Fusi Pecci and F.R. Ferraro |
astro-ph/9509082 | Current Cosmological Simulations, Advice on their Interpretation, and an
IMAX Film Preview | This general talk is geared toward non-specialists and addresses three
questions: (1) What types of cosmological simulations are done? (2) What are
the relevant problems to address and what results can one expect? (3) How can
one tell if the results are reasonable? | 1995-09-15 | 2007-05-23 | [
"astro-ph"
] | F J Summers (Princeton University) |
astro-ph/9509079 | Combined stellar structure and atmosphere models for massive stars:
Wolf-Rayet models with spherically outflowing envelopes | We present a simple analytical method to describe the structure of a
spherically expanding envelope with strong mass outflow. The structure is
consistently connected to the hydrostatic stellar interior and provides an
adequate description of the outer boundary conditions for stellar models with
large mass loss rates. W... | 1995-09-15 | 2008-02-03 | [
"astro-ph"
] | D. Schaerer (Geneva Observatory) |
astro-ph/9509084 | Mode Identification of the Slowly Pulsating F0V Star V398 Aurigae (9
Aur) | We have investigated the F0V star V398\,Aurigae (= 9 Aur) under the
assumption that it is undergoing non-radial gravity mode oscillations and that
the two principal periods given by Krisciunas et al. (1995) are correct. We
find that the two periods are manifestations of an $\ell=3, |m|=1$ spheroidal
mode and its toroid... | 1995-09-15 | 2015-06-24 | [
"astro-ph"
] | Conny Aerts, Kevin Krisciunas |
astro-ph/9509073 | Luminous Quasars in Luminous Early-Type Host Galaxies | Some recent observations of nearby quasars with HST have apparently failed to
detect host galaxies. We review the HST observations as well as near infrared
ground-based observations of the same objects. We find that the quasar hosts
can be detected in the HST data if they are smoothed sufficiently to reveal low
surface... | 1995-09-14 | 2009-10-28 | [
"astro-ph"
] | K. K. McLeod (SAO) and G. H. Rieke (Steward) |
astro-ph/9509074 | On the Density of PBH's in the Galactic Halo | Calculations of the rate of local Primordial Black Hole explosions often
assume that the PBH's can be highly concentrated into galaxies, thereby
weakening the Page-Hawking limit on the cosmological density of PBH's. But if
the PBH's are concentrated by a factor exceeding $c/(H_\circ R_\circ) \approx 4
\times 10^5$, whe... | 1995-09-14 | 2009-10-28 | [
"astro-ph"
] | Edward L. Wright (UCLA Physics & Astronomy Dept.) |
astro-ph/9509076 | Molecular gas observations and enhanced massive star formation
efficiencies in M100 | We present new J=1-0 12-CO observations along the northern spiral arm of the
grand-design spiral galaxy M100 (NGC 4321), and study the distribution of
molecular hydrogen as derived from these observations, comparing the new data
with a set of data points on the southern arm published previously. We compare
these measur... | 1995-09-14 | 2007-05-23 | [
"astro-ph"
] | J.H. Knapen (Univ. de Montreal), J.E. Beckman, J. Cepa (IAC Tenerife),
N. Nakai (Nobeyama R.O.) |
astro-ph/9509077 | The Mass Distribution in Clusters of Galaxies from Weak and Strong
Lensing | This paper is intended as an introduction to the theory of weak lensing. A
review of the inversion formula introduced by Kaiser and Squires is presented.
We then prove the formula of the aperture densitometry method in a simple way
that allows a clear understanding of where the various terms come from. This is
particul... | 1995-09-14 | 2007-05-23 | [
"astro-ph"
] | Jordi Miralda-Escude |
astro-ph/9509072 | High angular resolution coronography for adaptive optics | Recent adaptive optics systems in astronomy achieve high-angular resolution.
With the extreme stability of the images, detection at very low fluxes can be
reached using a coronograph at the diffraction limit of the telescopes. This
paper is an overview of the issues of stellar coronography used at the
diffraction limit... | 1995-09-14 | 2007-05-23 | [
"astro-ph"
] | Fabien Malbet (Laboratoire d'Astrophysique, Observatoire de Grenoble) |
astro-ph/9509075 | Another Look at Gaussian Isocurvature Hot Dark Matter Models For Large-
Scale Structure | We examine Gaussian isocurvature hot dark matter (massive neutrino) models
for large-scale structure in which the initial density perturbations are
produced in the baryons with a power--law spectrum $P_B(k) = Ak^{n_B}$. We
calculate the linearly-evolved power spectrum and cosmic microwave
fluctuations. We find that mod... | 1995-09-14 | 2009-10-28 | [
"astro-ph"
] | Andrew A. de Laix (Case Western Reserve University) and Rober J.
Scherrer (The Ohio State University) |
astro-ph/9509070 | Accretion discs around black holes: two dimensional, advection cooled
flows | Two-dimensional accretion flows near black holes have been investigated by
time-dependent hydrodynamical calculations. We assume that the flow is
axisymmetric and that radiative losses of internal energy are negligible, so
that the disc is geometrically thick and hot. Accretion occurs due to the
overflow of the effecti... | 1995-09-13 | 2015-06-24 | [
"astro-ph"
] | Igor V. Igumenshchev, Xingming Chen and Marek A. Abramowicz |
astro-ph/9509071 | Accurate Wavenumbers for Mid-Infrared Fine-Structure Lines | We present accurate new wavenumbers for a set of 13 mid-infrared
fine-structure lines. The wavenumbers were determined from observations of the
planetary nebula NGC 7027 and of the red supergiant Alpha Scorpii. Most of the
new wavenumbers are good to within 0.0025%, or 8 km/s. We provide details on
the measurements and... | 1995-09-13 | 2009-10-28 | [
"astro-ph"
] | Douglas M. Kelly and John H. Lacy (Dept. of Ast., U. of Texas) |
astro-ph/9509069 | Incorporating Morphological Types into Semi-analytic Schemes for Galaxy
Formation | We test the hypothesis that elliptical galaxies are formed by violent mergers
in a universe with hierarchical structure formation. Within the framework of a
semi-analytic scheme for galaxy formation, we predict the distribution of
morphological types with redshift and compare the colours of elliptical
galaxies in diffe... | 1995-09-13 | 2007-05-23 | [
"astro-ph"
] | C.M.Baugh (Durham University) |
astro-ph/9509068 | Continuum emission associated with 6.7-GHz methanol masers | We have used the Australia Telescope Compact Array (ATCA) to search for
continuum emission toward three strong 6.7-GHz methanol maser sources. For two
of the sources, G339.88-1.26 and NGC 6334F (G351.42+0.64), we detect continuum
emission closely associated with the methanol masers. A further three clusters
of masers s... | 1995-09-13 | 2015-06-24 | [
"astro-ph"
] | S.P. Ellingsen (Uni of Tas), R.P. Norris (ATNF), P.M. McCulloch (Uni
of Tas) |
astro-ph/9509067 | A Study of Absorption Features in the Three Micron Spectra of Molecular
Cloud Sources with H$_2$O Ice Bands | New 3.3--3.6~$\mu$m spectra were obtained of nine young stellar objects
embedded in molecular clouds. An absorption feature at $\sim$3.47~$\mu$m
(2880~cm$^{-1}$) with FWHM$\sim$0.09 $\mu$m (80 cm$^{-1}$), first identified by
Allamandola et al. (1992), was definitively detected toward seven objects, and
marginally in th... | 1995-09-12 | 2009-10-28 | [
"astro-ph"
] | T. Y. Brooke (Jet Propulsion Laboratory), K. Sellgren (Ohio State
University), and R. G. Smith (University of New South Wales) |
astro-ph/9509062 | The Helium-Core Mass at the Helium Flash in Low-Mass Red Giant Stars:
Observations and Theory | The method developed by Raffelt (1990a,b,c) to estimate a possible increase
in the standard values of the helium-core mass at the tip of the red giant
branch, $\Mc$, from properties of the color-magnitude diagrams of Galactic
globular clusters is employed. In the present study, we revise and update
Raffelt's database, ... | 1995-09-12 | 2009-10-28 | [
"astro-ph",
"hep-ph"
] | M. Catelan, J.A. de Freitas Pacheco, and J.E. Horvath |
astro-ph/9509066 | Simulating Our Cosmological Neighborhood: Mock Catalogs for Velocity
Analysis | We describe the construction of an N-body simulation that mimics the true
velocity and mass-density fields in a box of side 256\hmpc about the Local
Group , and the production of mock catalogs that mimic in detail current
catalogs of redshifts and peculiar velocities. Our main purpose is to provide a
tool for developin... | 1995-09-12 | 2009-10-28 | [
"astro-ph"
] | Tsafrir Kolatt, Avishai Dekel, Galit Ganon, and Jeffrey Willick |
astro-ph/9509065 | The Case Against Bimodal Star Formation in Elliptical Galaxies | We consider the present-day photometric and chemical properties of elliptical
galaxies, adopting the bimodal star formation scenario of Elbaz, Arnaud &
Vangioni-Flam (1995). These models utilise an initial mass function (IMF)
biased heavily toward massive stars during the early phases of galactic
evolution, leading to ... | 1995-09-12 | 2015-06-24 | [
"astro-ph"
] | Brad K. Gibson (University of Oxford) |
astro-ph/9509063 | Globular Cluster Ages and the Formation of the Galactic Halo | Main sequence turnoff magnitudes from the recent set of Yale isochrones
(Chaboyer \ea 1995) have been combined with a variety of relations for the
absolute magnitude of RR Lyr stars (\mvrr) to calibrate age as a function of
the difference in magnitude between the main sequence turn-off and the
horizontal branch (\dv). ... | 1995-09-12 | 2009-10-28 | [
"astro-ph"
] | Brian Chaboyer (CITA), P. Demarque (Yale) & Ata Sarajedini (KPNO) |
astro-ph/9509064 | Problems of Dark Matter | The data indicating existence of different forms of dark matter in the
universe as well as the role of this matter in structure formation are briefly
reviewed. It is argued that vacuum energy gives a dominant contribution into
the total energy density of the universe. The model of structure formation with
unstable tau-... | 1995-09-12 | 2007-05-23 | [
"astro-ph"
] | A.D. Dolgov |
astro-ph/9509058 | Anomalous Transport and Particle Acceleration at Shocks | The theory of first order Fermi acceleration at shocks assumes that particles
diffuse due to scattering off slow-moving magnetic irregularities. However,
cosmic rays are closely tied to magnetic field lines, and the transport
process, particularly across the direction of the field, is likely to be more
complicated. To ... | 1995-09-11 | 2011-05-23 | [
"astro-ph"
] | P. Duffy, J.G. Kirk, Y.A. Gallant, R.O. Dendy |
astro-ph/9509061 | Faint Extended X-ray Sources: A new Large Area Survey | We have searched for extended X-ray sources in the ROSAT PSPC archive using
the Voronoi Tesslation and Percolation algorithm (VTP). This algorithm detects
all significant sources regardless of shape or size, and is particularly suited
to finding low surface brightness extended sources which could be missed or
wrongly i... | 1995-09-11 | 2007-05-23 | [
"astro-ph"
] | L.R.Jones, C.A.Scharf (NASA/Goddard), H.Ebeling (IoA, Camb), E.Perlman
(NASA/Goddard), M.Malkan (UCLA), G.Wegner (Dartmouth) |
astro-ph/9509060 | Statistics and properties of HII regions in a sample of grand design
galaxies I. Luminosity functions | We present new high quality continuum-subtracted H alpha images of the
grand-design galaxies NGC 157, NGC 3631, NGC 6764 and NGC 6951. We have
determined the positions, angular sizes, and fluxes of their individual HII
regions, and describe statistical properties of the HII region samples. We
construct luminosity funct... | 1995-09-11 | 2007-05-23 | [
"astro-ph"
] | M. Rozas, J.E. Beckman (IAC Tenerife), J.H. Knapen (Univ. de Montreal) |
astro-ph/9509059 | Inelastic clump collision model for non-Gaussian velocity distribution
in molecular clouds | Non-Gaussian velocity distribution in star forming region is reproduced by
inelastic clump collision model. We numerically calculated the evolution of
inelastic hard spheres in sheared flow, which corresponds to cloud clumps in
differential galactic rotation. This system fluctuates largely around
equilibrium state, cre... | 1995-09-11 | 2008-02-03 | [
"astro-ph"
] | Shigeru Ida (Department of Earth and Planetary Science, Tokyo
Institute of Technology, Tokyo, Japan) and Y-h. Taguchi (Department of
Physics, Tokyo Institute of Technology, Japan,
http://www.phys.titech.ac.jp/~tag/) |
astro-ph/9509057 | Invisible Matter | These lectures have been given to particle physicists, mostly
experimentalists and very briefly and at a pedestrian level review the problems
of dark matter. The content of the lectures is the following:
1. Introduction.
2. Cosmological background.
3. Luminous matter.
4. Primordial nucleosynthesis and the total... | 1995-09-10 | 2015-06-24 | [
"astro-ph",
"hep-ph"
] | A.D. Dolgov |
astro-ph/9509055 | Recent progress in the search for black holes in galactic nuclei | Massive nuclear black holes of 10^6 - 10^9 solar masses are believed to be
responsible for the the energy production in quasars and active galaxies, and
are thought to be present in many quiescent galaxies as well. Dynamical
evidence for this can be sought by studying the dynamics of gas and stars in
galactic nuclei at... | 1995-09-09 | 2007-05-23 | [
"astro-ph"
] | Roeland P. van der Marel |
astro-ph/9509053 | The New Universe Fixed by a Standing Wave Particle Model | The theoretical properties of the black holes (BHs) and of the universe were
derived from a unified relativistic theory based on a generalization of local
relativity for nonlocal cases in gravitational fields and a quantized standing
wave particle model that accounts for relativity, quantum mechanics and the
gravitatio... | 1995-09-09 | 2008-02-03 | [
"astro-ph",
"gr-qc"
] | Rafael A. Vera |
astro-ph/9509056 | A Serendipitous Deep Cluster Survey from ROSAT--PSPC pointed
observations | We present a deep X-ray selected sample of galaxy clusters which has been
created from a serendipitous search in ROSAT-PSPC deep pointed observations at
high galactic latitude. This survey, hereafter known as the ROSAT Deep Cluster
Survey (RDCS), is being carried out utilizing a wavelet-based detection
algorithm which,... | 1995-09-09 | 2007-05-23 | [
"astro-ph"
] | P.Rosati |
astro-ph/9509050 | Halo Star Evolution | In this review, I will discuss a few problems which point to the need for
improved stellar evolution models of halo stars. Current stellar evolution
models do not match the observed $^7$Li abundance patterns, suggesting that the
input physics and/or the assumptions used in constructing the models are in
need of revisio... | 1995-09-08 | 2007-05-23 | [
"astro-ph"
] | Brian Chaboyer (CITA) |
astro-ph/9509051 | Low-mass star formation in CG1: a diffraction limited search for
pre-main sequence stars next to NX Pup | Using adaptive optics at the ESO 3.6m telescope, we obtained diffraction
limited JHK-images of the region around the Herbig AeBe star NX Pup. We clearly
resolved the close companion (sep. 0.128") to NX Pup -- originally discovered
by HST -- and measured its JHK magnitudes. A third object at a separation of
7.0" from NX... | 1995-09-08 | 2007-05-23 | [
"astro-ph"
] | W. Brandner, J. Bouvier, E.K. Grebel, E. Tessier, D. de Winter, and
J.-L. Beuzit |
astro-ph/9509052 | Universality of the Network and Bubble Topology in Cosmological
Gravitational Simulations | Using percolation statistics we, for the first time, demonstrate the
universal character of a network pattern in the real space, mass distributions
resulting from nonlinear gravitational instability of initial Gaussian
fluctuations. Percolation analysis of five stages of the nonlinear evolution of
five power law models... | 1995-09-08 | 2009-10-28 | [
"astro-ph"
] | Capp Yess and Sergei F. Shandarin (University of Kansas, Lawrence, KS) |
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