id large_stringlengths 9 16 | title large_stringlengths 1 382 | abstract large_stringlengths 3 6.09k | publish_date date32 | update_date date32 | categories large listlengths 1 13 | authors large_stringlengths 3 62.8k |
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astro-ph/9506070 | COSMICS: Cosmological Initial Conditions and Microwave Anisotropy Codes | COSMICS is a package of fortran programs useful for computing transfer
functions and microwave background anisotropy for cosmological models, and for
generating gaussian random initial conditions for nonlinear structure formation
simulations of such models. Four programs are provided: {\bf linger\_con} and
{\bf linger\... | 1995-06-12 | 2016-08-30 | [
"astro-ph"
] | Edmund Bertschinger |
astro-ph/9506076 | Acceleration Rates and Injection Efficiencies in Oblique Shocks | The rate at which particles are accelerated by the first-order Fermi
mechanism in shocks depends on the angle, \teq{\Tbone}, that the upstream
magnetic field makes with the shock normal. The greater the obliquity the
greater the rate, and in quasi-perpendicular shocks rates can be hundreds of
times higher than those se... | 1995-06-12 | 2009-10-28 | [
"astro-ph"
] | D. C. Ellison, M. G. Baring and F. C. Jones |
astro-ph/9506074 | Can the Tully-Fisher Relation be the Result of Initial Conditions? | We use Monte Carlo realizations of halo formation histories and a spherical
accretion model to calculate the expected scatter in the velocity dispersions
of galactic halos of a given mass due to differences in their formation times.
Assuming that the rotational velocity of a spiral galaxy is determined by the
velocity ... | 1995-06-12 | 2009-10-28 | [
"astro-ph"
] | Daniel J. Eisenstein and Abraham Loeb (Harvard Univ.) |
astro-ph/9506072 | Cosmological Perturbation Theory in the Synchronous and Conformal
Newtonian Gauges | This paper presents a systematic treatment of the linear theory of scalar
gravitational perturbations in the synchronous gauge and the conformal
Newtonian (or longitudinal) gauge. It differs from others in the literature in
that we give, in both gauges, a complete discussion of all particle species
that are relevant to... | 1995-06-11 | 2015-06-24 | [
"astro-ph",
"hep-ph"
] | Chung-Pei Ma and Edmund Bertschinger |
astro-ph/9506071 | Sagittarius: The Nearest Dwarf Galaxy | We have discovered a new Galactic satellite galaxy in the constellation of
Sagittarius. The Sagittarius dwarf galaxy is the nearest galaxy known, subtends
an angle of $> 10$ degrees on the sky, lies at a distance of $24 \kpc$ from the
Sun, $\sim 16 \kpc$ from the centre of the Milky Way. Itis comparable in size
and lum... | 1995-06-10 | 2015-06-24 | [
"astro-ph"
] | Rodrigo Ibata(UBC, Vancouver,CA), G. Gilmore (IoA Cambridge, GB), M.J.
Irwin (RGO, Cambridge) |
astro-ph/9506066 | The outburst of the T Tauri star EX Lupi in 1994 | We have observed an outburst of the T Tauri star EX Lup in March 1994. We
present both photometric (BVR) and spectroscopic (low and medium resolution)
observations carried out during the decline after outburst. The star appears
much bluer during outburst due to an increased emission of a hot continuum.
This is accompan... | 1995-06-09 | 2007-05-23 | [
"astro-ph"
] | Thomas Lehmann, Bo Reipurth, and Wolfgang Brandner |
astro-ph/9506063 | Unified Schemes for Radio-Loud Active Galactic Nuclei | The appearance of active galactic nuclei (AGN) depends so strongly on
orientation that our current classification schemes are dominated by random
pointing directions instead of more interesting physical properties. Light from
the centers of many AGN is obscured by optically thick circumnuclear matter and
in radio-loud ... | 1995-06-09 | 2011-07-18 | [
"astro-ph"
] | C. Megan Urry and Paolo Padovani |
astro-ph/9506068 | Geocentrism reexamined | The universe is nearly isotropic on very large scales. It is much more
difficult to show that the universe is radially homogeneous (independent of
distance), or equivalently, that it is isotropic about distant points. This
taken as an axiom, since if it were not true, then we would occupy a preferred
position. This pap... | 1995-06-09 | 2009-10-28 | [
"astro-ph"
] | Jeremy Goodman (Princeton University Observatory) |
astro-ph/9506067 | Peak mass and dynamical friction | We show how the results given by several authors relatively to the mass of a
density peak are changed when small scale substructure induced by dynamical
friction are taken into account. The peak mass obtained is compared to the
result of Peacock \& Heavens (1990) and to the peak mass when dynamical
friction is absent t... | 1995-06-09 | 2007-05-23 | [
"astro-ph"
] | A. Del Popolo and M. Gambera (Institute of Astronomy, University of
Catania, ITALY) |
astro-ph/9506069 | Globular Cluster Systems As Distance Indicators: Metallicity Effects On
The Luminosity Function | We investigate the universality of the globular cluster luminosity function
(GCLF) and the use of this function as an extragalactic distance indicator.
Previous studies have found an offset between GCLF distances and those obtained
with other techniques. We show that this offset can be understood in terms of a
metallic... | 1995-06-09 | 2009-10-28 | [
"astro-ph"
] | Keith M. Ashman (Kansas), Alberto Conti (Kansas), Stephen E. Zepf (UC
Berkeley) |
astro-ph/9506065 | EUV Emission from Normal Galaxies | Using data from the ROSAT Wide Field Camera all-sky survey, we have
established upper limits to the extreme ultraviolet (EUV) flux from a sample of
30 bright, nearby, non-active spiral galaxies. These galaxies were chosen to be
those most likely to be detected in the EUV on the basis of (i) low
interstellar absorption ... | 1995-06-08 | 2007-05-23 | [
"astro-ph"
] | A.M. Read and T.J. Ponman (University of Birmingham, U.K) |
astro-ph/9506062 | Hot tori around black holes as sources of gamma ray bursts | We investigate the configurations consisting of massive, dense and hot tori
around stellar mass Kerr black holes as possible sources of energy for the
gamma ray bursts in cosmological hypothesis of their origin. We limit
parameters of our models to the values resulting from neutron stars merger
calculations or suggeste... | 1995-06-08 | 2008-02-03 | [
"astro-ph"
] | M. Jaroszynski (Warsaw University Observatory) |
astro-ph/9506057 | An Origin for Pulsar Kicks in Supernova Hydrodynamics | It is now believed that pulsars comprise the fastest population of stars in
the galaxy. With inferred mean, root-mean-square, and maximum 3-D pulsar speeds
of $\sim$300-500 km/s, $\sim$500 km/s, and $\sim$2000 km/s, respectively, the
question of the origin of such singular proper motions becomes acute. What
mechanism c... | 1995-06-08 | 2009-10-28 | [
"astro-ph"
] | Adam Burrows and John Hayes (University of Arizona) |
astro-ph/9506059 | Probing Dark Matter | Recent novel observations have probed the baryonic fraction of the galactic
dark matter that has eluded astronomers for decades. Late in 1993, the MACHO
and EROS collaborations announced in this journal the detection of transient
and achromatic brightenings of a handful of stars in the Large Magellanic Cloud
that are b... | 1995-06-08 | 2009-10-28 | [
"astro-ph"
] | Adam Burrows and Jim Liebert (University of Arizona) |
astro-ph/9506061 | On the Nature of Core Collapse Supernova Explosions | We investigate in this paper the core-collapse supernova explosion mechanism
in both one and two dimensions. We verify the usefulness of neutrino-driven
overturn (``convection'') between the shock and the neutrinosphere in igniting
the supernova explosion. The 2-D simulation of the core of a 15$\mdot$ star
that we pres... | 1995-06-08 | 2009-10-28 | [
"astro-ph"
] | Adam Burrows and John Hayes (University of Arizona) and Bruce Fryxell
(Goddard SFC) |
astro-ph/9506060 | The Physics of Core-Collapse Supernova Explosions | Fresh insights and powerful numerical tools are revitalizing the theoretical
exploration of the supernova mechanism. The realization that the protoneutron
star is Rayleigh-Taylor unstable at various times and radii and, hence, that a
multi-dimensional perspective is required is one agent of this revolution.
However, a ... | 1995-06-08 | 2007-05-23 | [
"astro-ph"
] | Adam Burrows anbd John Hayes (University of Arizona) |
astro-ph/9506055 | Prospects for Detection of Extra-Solar Giant Planets by Next-Generation
Telescopes | Interest among astronomers in the detection of extra-solar planets is
accelerating with the growing realization that it may soon be technically
feasible. The ongoing renaissance in telescope construction and the anticipated
launches of new space platforms are encouraging many scientists to review and
improve the means ... | 1995-06-08 | 2009-10-28 | [
"astro-ph"
] | A. Burrows, D. Saumon, T. Guillot, W.B. Hubbard, and J.I. Lunine |
astro-ph/9506058 | A Gamma-Ray Monte Carlo Study of the Clumpy Debris of SN1987A | We have performed Monte Carlo calculations of gamma-ray transport in models
of the clumpy debris cloud of the LMC supernova, SN1987A, to study the
influence of composition mixing and heterogeneity on its emergent gamma-ray and
X-ray fluxes. In particular, we have focused on the problematic Ginga band (16
-- 28 keV) flu... | 1995-06-08 | 2009-10-28 | [
"astro-ph"
] | Adam Burrows (University of Arizona) and Ken Van Riper (LANL) |
astro-ph/9506056 | Bar-driven Fueling to a Galactic Central Reagin in a Massive Gas Disk | We have found an effective fueling process to a central region of galaxies
with weak bar-like distortion by two dimensional hydrodynamical simulations.
Gravitational instability of an elongated gas ring at the inner Lindblad
resonance (ILR), which has been reported as an effective fueling mechanism, are
not needed for ... | 1995-06-08 | 2015-06-24 | [
"astro-ph"
] | Keiichi Wada and Asao Habe |
astro-ph/9506064 | COBE Observations of the Microwave Counterparts of Gamma Ray Bursts | We have used the data from the COBE satellite to search for delayed microwave
emission (31 - 90 GHz) from Gamma Ray Bursts (GRBs). The large $7^\circ$ beam
of COBE is well matched to the large positional uncertainties in the GRB
locations, although it also means that fluxes from (point source) GRB objects
will be dilut... | 1995-06-08 | 2009-10-28 | [
"astro-ph"
] | R. K. Schaefer, S.Ali, M. Limon, and L. Piccirillo (Bartol Res. Inst.) |
astro-ph/9506046 | Search for new pulsating O VI central stars of planetary nebulae | A photoelectric monitoring program has been applied, during the last four
years, to five central stars of planetary nebulae (PNNs) with strong O\,VI
$\lambda$ 3811--34 \AA \hspace{0.1mm} emission. NGC\,6905 and, marginally,
NGC\,2452, show intrinsic luminosity variations, while NGC\,7026, IC\,2003 and
NGC\,1501 have co... | 1995-06-07 | 2007-05-23 | [
"astro-ph"
] | R. Silvotti, C. Bartolini and L. Stanghellini |
astro-ph/9506050 | Background X-ray Emission from Hot Gas in CDM and CDM+Lambda Universes:
Spectral Signatures | We present a new treatment of two popular models for the growth of structure,
examining the X-ray emission from hot gas with allowance for spectral line
emission from various atomic species, primarily ``metals". The X-ray emission
from the bright cluster sources is not significantly changed from prior work
and, as note... | 1995-06-07 | 2016-08-30 | [
"astro-ph"
] | Renyue Cen, Hyesung Kang, Jeremiah P. Ostriker and Dongsu Ryu |
astro-ph/9506044 | Good Abundances from Bad Spectra :II. Application and a New Stellar
Color--Temperature Relation | Stellar spectra derived from current multiple-object fiber-fed spectroscopic
radial-velocity surveys, of the type feasible with, among other examples,
AUTOFIB, 2dF, HYDRA, NESSIE, and the Sloan survey, differ significantly from
those traditionally used for determination of stellar abundances. The spectra
tend to be of ... | 1995-06-07 | 2007-05-23 | [
"astro-ph"
] | J. Bryn Jones, Rosemary F.G. Wyse and Gerard Gilmore |
astro-ph/9506053 | Counting Pairs of Faint Galaxies | The number of close pairs of galaxies observed to faint magnitude limits,
when compared to nearby samples, determines the interaction or merger rate as a
function of redshift. The prevalence of mergers at intermediate redshifts is
fundamental to understanding how galaxies evolve and the relative population of
galaxy ty... | 1995-06-07 | 2009-10-28 | [
"astro-ph"
] | David Woods, Gregory G. Fahlman and Harvey B. Richer |
astro-ph/9506054 | Macho Proper Motions From Optical/Infrared Photometry | Optical/infrared photometry can double the number of proper motion
measurements of Massive Compact Objects (MACHOs) relative to single band
photometry. The proper motion of a MACHO can be measured by finding the ratio
$q$ of the (known) radius of the source star to the Einstein radius of the
MACHO, $q=\theta_s/\theta_e... | 1995-06-07 | 2009-10-28 | [
"astro-ph"
] | Andrew Gould and Douglas L. Welch |
astro-ph/9506051 | Pattern in Nonlinear Gravatational Clustering: A Numerical Investigation | The nonlinear clustering of dark matter particles in an expanding universe is
usually studied by N-body simulations. One can gain some insight into this
complex problem if simple relations between physical quantities in the linear
and nonlinear regimes can be extracted from the results of N-body simulations.
Hamilton e... | 1995-06-07 | 2008-11-26 | [
"astro-ph"
] | T.Padmanabhan, Renyue Cen, Jeremiah P. Ostriker and F J Summers |
astro-ph/9506045 | Forbidden Fe+ Emission from Supernovae Remnants in M33 | Supernovae remnants are known to be luminous sources of infrared [FeII]
emission. By studying how the luminosity scales with age, environment and other
relevant factors, we can construct an [FeII] luminosity function for supernovae
remnants. This will enable us to predict supernovae rates in starburst galaxies
that are... | 1995-06-07 | 2015-06-24 | [
"astro-ph"
] | S.L. Lumsden (AAO), P.J. Puxley (ROE) |
astro-ph/9506048 | Rees-Sciama Effect in a CDM Universe | The Rees-Sciama (RS) effect produces fluctuations in the cosmic microwave
background (CMB) through the time-dependent gravitational potential in the
nonlinear stages of evolution. I investigate the RS effect on the CMB angular
power spectrum $C_l$ for several CDM models by combining the results of N-body
simulations wi... | 1995-06-07 | 2009-10-28 | [
"astro-ph"
] | Uros Seljak (MIT) |
astro-ph/9506049 | Inflationary Models with Logarithmic Potentials | We examine inflationary universe models driven by scalar fields with
logarithmic potentials of the form $V(\phi) = V_0 \phi^p(\ln \phi)^q$.
Combining the slow-roll approximation with asymptotic techniques, we identify
regions of the potential where inflation may occur and obtain analytic
expressions for the evolution o... | 1995-06-07 | 2009-10-28 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | John D. Barrow and Paul Parsons |
astro-ph/9506047 | The X-ray properties of the merging galaxy pair NGC 4038/9 - the
Antennae | We report the results of an X-ray spectral imaging observation of the
Antennae with the ROSAT PSPC. 55% of the soft X-ray flux from the system is
resolved into discrete sources, including components identified with the
galactic nuclei and large HII regions, whilst the remainder appears to be
predominantly genuinely dif... | 1995-06-07 | 2015-06-24 | [
"astro-ph"
] | A.M. Read, T.J. Ponman (University of Birmingham, U.K), R.D.
Wolstencroft (ROE, Edinburgh, U.K.) |
astro-ph/9506052 | Topology of Large-Scale Structure by Galaxy Type: Hydrodynamic
Simulations | The topology of large scale structure is studied as a function of galaxy type
using the genus statistic. In hydrodynamical cosmological CDM simulations,
galaxies form on caustic surfaces (Zeldovich pancakes) then slowly drain onto
filaments and clusters. The earliest forming galaxies in the simulations
(defined as ``el... | 1995-06-07 | 2012-08-27 | [
"astro-ph"
] | J. Richard Gott, III, Renyue Cen, and Jeremiah P. Ostriker |
astro-ph/9506033 | Radiation gasdynamics of planetary nebulae -- VI. The evolution of
aspherical planetary nebulae | This paper reports the results of the numerical study of the formation of
aspherical Planetary Nebulae through the Generalised Interacting Winds Model,
taking into account the effects caused by the evolving central star and fast
wind. The results show for the first time that aspherical nebulae do form
within the requir... | 1995-06-06 | 2015-06-24 | [
"astro-ph"
] | Garrelt Mellema |
astro-ph/9506036 | A combined X-ray and gravitational lensing study of the massive
cooling-flow cluster PKS0745-191 | We present spatially-resolved X-ray spectroscopy of the X-ray luminous
cluster of galaxies, PKS0745-191, using observations made with the ASCA and
ROSAT satellites. The X-ray data measure the density, temperature, and
metallicity profiles of the cluster gas and constrain the distribution of mass
in the cluster to a rad... | 1995-06-06 | 2015-06-24 | [
"astro-ph"
] | S.W. Allen, A.C. Fabian, J.P. Kneib |
astro-ph/9506037 | UNIFICATION OF THE NEARBY AND PHOTOMETRIC STELLAR LUMINOSITY FUNCTIONS | We introduce a model Galactic field low-mass stellar population that has a
proportion of binary systems as observed, with a mass ratio distribution
consistent with observational constraints. The model single star and system
luminosity function agrees with the nearby and the Malmquist corrected
photometric luminosity fu... | 1995-06-06 | 2009-10-28 | [
"astro-ph"
] | Pavel Kroupa |
astro-ph/9506032 | Statistics of optical intraday variability in a complete sample of
radio-selected BL Lac objects | We present a study of the intraday variability behaviour of a complete sample
of radio-selected BL Lac objects taken from the 1 Jy catalogue. In 28 out of 34
BL Lac objects (82\%) we detected intraday variability. 7 objects were observed
during several campaigns. None of them changed its variability behaviour. The
duty... | 1995-06-06 | 2016-08-30 | [
"astro-ph"
] | Jochen Heidt, Stefan J. Wagner (Landessternwarte Heidelberg, Germany) |
astro-ph/9506041 | Where is the Dark Matter? | How much dark matter is there in the universe and where is it located? These
are two of the most fundamental questions in cosmology. We use in this paper
optical and x-ray mass determinations of galaxies, groups, and clusters of
galaxies to suggest that most of the dark matter may reside in very large halos
around gala... | 1995-06-06 | 2009-10-28 | [
"astro-ph"
] | Neta A. Bahcall, Lori M. Lubin & Victoria Dorman (Princeton University
Observatory) |
astro-ph/9506035 | ON THE GEOMETRY OF THE X-RAY EMITTING REGION IN SEYFERT GALAXIES | For the first time, detailed radiative transfer calculations of Comptonized
X-ray and gamma-ray radiation in a hot pair plasma above a cold accretion disk
are performed using two independent codes and methods. The simulations include
both energy and pair balance as well as reprocessing of the X- and gamma-rays
by the c... | 1995-06-06 | 2016-08-30 | [
"astro-ph"
] | Boris E. Stern (Institute for Nuclear Research, Moscow, Russia) Juri
Poutanen (Stockholm Observatory, Sweden), Roland Svensson (Stockholm
Observatory, Sweden), Marek Sikora (Nicolaus Copernicus Astronomical Center,
Warsaw, Poland), Mitchell C. Begelman (JILA, University of Colorado, Boulder,
USA) |
astro-ph/9506040 | Spin-Statistics Connexion, Neutrinos, and Big Bang Nucleosynthesis | We show how the $^4$He-abundance in the early Universe can be used to
demonstrate that macroscopic samples of neutrinos in thermal equilibrium are
indeed distributed according to Fermi-Dirac statistics. | 1995-06-06 | 2011-05-23 | [
"astro-ph",
"hep-ph"
] | L. Cucurull, J.A. Grifols and R. Toldr\`a |
astro-ph/9506042 | DYNAMICS OF THE GALACTIC GLOBULAR CLUSTER NGC 3201 | B,V CCD frames have been used to derive surface brightness profiles for NGC
3201 out to ~18 arcmin. A total of 857 radial velocities with median precision
~1 km/s for 399 member giants have been used to trace the velocity dispersion
profile out to 32' (the approximate tidal radius from fits of single-mass,
isotropic Ki... | 1995-06-06 | 2009-10-28 | [
"astro-ph"
] | Patrick Cote, Douglas L. Welch, Philippe Fischer and K. Gebhardt |
astro-ph/9506031 | Analysis of Non-Linear Mode Coupling of Cosmological Density
Fluctuations by the Pseudo-Spectral Method | The pseudo-spectral method is proposed for following the evolution of density
and velocity fluctuations at the weakly non-linear stage in the expanding
universe with a good accuracy. In this method, the evolution of density and
velocity fluctuations is integrated in the Fourier Space with using FFT. This
method is very... | 1995-06-06 | 2017-02-01 | [
"astro-ph"
] | Naoteru Gouda |
astro-ph/9506038 | VLBI Observations of a Complete Sample of Radio Galaxies V. 3C346 and
4C31.04: two Unusual CSS Sources | We present observations at 1.7 and 8.4 GHz of two Compact Steep Spectrum
(CSS) sources from a complete sample of low-intermediate power radio galaxies.
3C346 shows an asymmetric structure with a one-sided ``jet'' and ``hot spot''.
Present observations suggest that the classification of this source as a CSS is
inappropr... | 1995-06-06 | 2009-10-28 | [
"astro-ph"
] | W.D. Cotton, L. Feretti, G. Giovannini, T. Venturi, L. Lara, J.
Marcaide and A. E. Wehrle |
astro-ph/9506034 | VLBI Observations of Low Power Radio Galaxies | The parsec scale properties of low power radio galaxies are reviewed here,
using the available data on 12 FR I galaxies. The most frequent radio structure
is an asymmetric parsec-scale morphology, i.e. core and one-sided jet. It is
shared by 9 (possibly 10) of the 12 mapped radio galaxies. One (possibly 2) of
the other... | 1995-06-06 | 2007-05-23 | [
"astro-ph"
] | G. Giovannini, W.D. Cotton, L. Feretti, L. Lara, T.Venturi, J.M.
Marcaide |
astro-ph/9506043 | A Near-Infrared Search for Line Emission from Protogalaxies Using the W.
M. Keck Telescope | We present the first results from a near-infrared narrow-band search for
primeval galaxies (PGs) using the Keck 10~m telescope. We have targeted our
fields for three QSOs and one radio galaxy at redshifts $z = 2.28$ to $4.70$.
We selected narrow-band filters in the $K$-band centered on strong emision
lines at the redsh... | 1995-06-06 | 2009-10-28 | [
"astro-ph"
] | M. A. Pahre and S. G. Djorgovski (Palomar Observatory, Caltech) |
astro-ph/9506039 | Detection of dust in the most distant known radiogalaxy | A search for millimetric continuum emission from eight optically-selected,
radio-quiet quasars and a radiogalaxy with 3.7 < z < 4.3, has been undertaken
using a highly sensitive 7-channel bolometer on the IRAM 30-m Millimetre Radio
Telescope. Detections of a potentially dust-rich quasar, and of 8C1435+635, the
most dis... | 1995-06-06 | 2016-06-08 | [
"astro-ph"
] | R. J. Ivison (Royal Observatory, Edinburgh) |
astro-ph/9506024 | Influence of the symmetry energy on the birth of neutron stars and
supernova neutrinos | We study the influence of the symmetry energy of the equation of state on the
thermal evolution of protoneutron stars and the properties of supernova
neutrinos by the numerical simulations after the protoneutron stars are formed.
As for the equation of state (EOS) of nuclear matter, we take two EOS's with
different sym... | 1995-06-05 | 2011-05-23 | [
"astro-ph",
"nucl-th"
] | K. Sumiyoshi, H. Suzuki, H. Toki |
astro-ph/9506029 | A ROSAT Search for X-ray Emission from Quasar Host Clusters | We report the results of a search for X-ray emission from quasar host
clusters at moderate redshift using the {\sl ROSAT} HRI. We detect no emission
from the host clusters of 3C~263 (z=0.646) and PKS~2352-34 (z=0.706) to
3$\sigma$\ limits of 3.26 and 2.86 $\times$10$^{44}$\ ergs~s$^{-1}$
respectively (H$_o$=50, q$_o$=1... | 1995-06-05 | 2009-10-28 | [
"astro-ph"
] | Patrick B. Hall (University of Arizona), Erica Ellingson (University
of Colorado), Richard F. Green (KPNO), and Howard Yee (University of Toronto) |
astro-ph/9506026 | Tidal Shear on Density Perturbations and Galaxy Formation | The strenth of the tidal shear produced by the large-scale density field
acting on primordial density perturbations is calculated in power law models.
It is shown that the large-scale tidal field could, strongly affect the
morphology, orientation and angular momentum aquisition of density peaks
possibly playing a role ... | 1995-06-05 | 2007-05-23 | [
"astro-ph"
] | Alejandro Gonzalez (S. Instituto Nacional de Astrofisica, Optica y
Elec) |
astro-ph/9506025 | Application of the spectral subtraction technique to the CaII H & K and
H$\epsilon$ lines in a sample of chromospherically active binaries | We present new spectroscopic observations in the Ca~{\sc ii} H \& K line
region for a sample of 28 chromospherically active binary systems (RS$~$CVn and
BY$~$Dra classes), with different activity levels. By using the spectral
subtraction technique (subtraction of a synthesized stellar spectrum
constructed from referenc... | 1995-06-05 | 2007-05-23 | [
"astro-ph"
] | D. Montes, E. De Castro, M.J. Fernandez-Figueroa, M. Cornide |
astro-ph/9506030 | High Resolution Infrared Imaging of FSC10214+4724: Evidence for
Gravitational Lensing | We present near--infrared observations of the ultraluminous high-redshift
(z=2.286) IRAS source FSC 10214+4724 obtained in 0.''4 seeing at the W. M. Keck
telescope. These observations show that FSC 10214+4724 consists of a highly
symmetric circular arc centered on a second weaker source. The arc has an
angular extent o... | 1995-06-05 | 2009-10-28 | [
"astro-ph"
] | James R. Graham and Michael C. Liu (Astronomy Department, University
of California, Berkeley) |
astro-ph/9506028 | Measuring q_0 from the Distortion of Voids in Redshift Space | Because the transformation from distance to redshift is nonlinear, maps in
redshift space become increasingly distorted as the redshift z becomes greater.
As noted by Alcock \& Paczy\'nski (1979), observed redshift distortions can be
used to estimate the deceleration parameter $q_0$. If $q_0$ is greater than -1,
voids ... | 1995-06-05 | 2009-10-28 | [
"astro-ph"
] | Barbara Ryden (Ohio State University) |
astro-ph/9506023 | Violation of the inverse square law by the emissions of supersonically
and superluminally moving volume sources | The generally familiar notion that the conservation of energy requires the
intensity of the radiation generated by a localized finite-duration source to
decay like the inverse square of the distance from the source is not
necessarily true. In this paper, we identify physically tenable sources of
acoustic and electromag... | 1995-06-05 | 2009-09-25 | [
"astro-ph"
] | H. Ardavan, J. E. Ffowcs Williams |
astro-ph/9506027 | The Age of the Universe | It is found that the ages of the most metal-poor Galactic globular clusters
are probably around 18 Gyr. On the other hand a Hubble parameter of 82 +/- 8
km/sec/Mpc (in conjunction with the standard Einstein-de Sitter model with an
Omega =1 and Lambda =0) yields and age of the Universe of about 8 Gyr. Some
possible reas... | 1995-06-05 | 2007-05-23 | [
"astro-ph"
] | Sidney van den Bergh |
astro-ph/9506021 | PULSARS WITH STRONG MAGNETIC FIELDS: POLAR GAPS, BOUND PAIR CREATION AND
NONTHERMAL LUMINOSITIES | Modifications to polar-gap models for pulsars are discussed for the case
where the surface magnetic field, $B_\S$, of the neutron star is strong. For
$B\ga4\times10^8\rm\,T$, the curvature $\gamma$-quanta emitted tangentially to
the curved force lines of the magnetic field are captured near the threshold of
bound pair ... | 1995-06-04 | 2015-06-24 | [
"astro-ph"
] | V.V. Usov and D.B. Melrose |
astro-ph/9506022 | Correlation function as a measure of the structure | Geometrical model of structure of the universe is examined to obtain
analytical expression for the two points nonlinear correlation function.
According to the model the objects (galaxies) are concentrated into two types
of structure elements - filaments and sheets. We considered the filaments (
similar to galaxy filame... | 1995-06-04 | 2007-05-23 | [
"astro-ph"
] | O. Buryak & A. Doroshkevich |
astro-ph/9506020 | IMAGING SPECTROPHOTOMETRY OF MARKARIAN 573 | Narrow-band emission-line and continuum images obtained in subarcsecond
seeing conditions are presented for the Seyfert~2 galaxy, Markarian 573. Images
in the emission-lines of [\oi], [\oii], [\oiii], [\sii], and \halpha+[\nii] are
used to measure the structure and excitation in the extended emission regions
surroundin... | 1995-06-03 | 2009-10-28 | [
"astro-ph"
] | Richard Pogge (Ohio State) and Michael De Robertis (York Univ) |
astro-ph/9506017 | Inflation with $\Omega \not = 1$ | We discuss various models of inflationary universe with $\Omega \not = 1$. A
homogeneous universe with $\Omega > 1$ may appear due to creation of the
universe "from nothing" in the theories where the effective potential becomes
very steep at large $\phi$, or in the theories where the inflaton field $\phi$
nonminimally ... | 1995-06-03 | 2016-08-30 | [
"astro-ph",
"gr-qc",
"hep-ph",
"hep-th"
] | Andrei Linde and Arthur Mezhlumian |
astro-ph/9506019 | A study of the core of the Shapley Concentration: II. ROSAT observation
of A3558 | We present the results of a pointed ROSAT PSPC observation of the cluster
A3558 which is part of the core of the Shapley Concentration. The X-ray
brightness distribution can be fitted as the sum of an elliptical King law,
with a major core radius of about 0.20 Mpc and an axial ratio 0.72, and a
Gaussian central source ... | 1995-06-03 | 2007-05-23 | [
"astro-ph"
] | S.Bardelli, E.Zucca, A.Malizia, G.Zamorani, R.Scaramella, G.Vettolani |
astro-ph/9506018 | Relaxation processes in one-dimensional self-gravitating many-body
systems | Though one dimensional self-gravitating $N$-body systems have been studied
for three decade, the nature of relaxation was still unclear. There were
inconsistent results about relaxation time; some initial state relaxed in the
time scale $T\sim N\,t_c$, but another state did not relax even after $T\sim
N^2\,t_c$, where ... | 1995-06-03 | 2009-10-28 | [
"astro-ph"
] | Toshio Tsuchiya (National Astronomical Observatory, Mitaka, Japan),
Naoteru Gouda (Department of Earth and Space Science, Osaka University,
Japan) and Tetsuro Konishi (Department of Physics, Nagoya University, Japan) |
astro-ph/9506014 | The role of cooling flows in galaxy formation | The present structure of galaxies is governed by the radiative dissipation of
the gravitational and supernova energy injected during formation. A crucial
aspect of this process is whether the gas cools as fast as it falls into the
gravitational potential well. If it does then rapid normal star formation is
assumed to e... | 1995-06-02 | 2015-06-24 | [
"astro-ph"
] | P.E.J. Nulsen, A.C. Fabian |
astro-ph/9506011 | Structure Formation with a Decaying Mev Tau Neutrino and a Kev Majoron | We consider the scenario of large scale structure formation with tau neutrino
with mass in the MeV range and lifetime of order of years which decays into a
massive majoron with KeV mass. The latter are the present-day cold dark matter
particles. In contrast to the usual collisionless dark matter, the majorons
have a re... | 1995-06-02 | 2007-05-23 | [
"astro-ph",
"hep-ph"
] | A.D. Dolgov, S. Pastor and J.W.F. Valle |
astro-ph/9506016 | MACHO COLLABORATION SEARCH FOR BARYONIC DARK MATTER VIA GRAVITATIONAL
MICROLENSING | Results are presented from the MACHO collaboration gravitational microlensing
search. The experiment and the nearly 50 microlensing events that have been
detected are described. Limits on the baryonic content of the halo are given,
as are estimates of the Macho contribution to the dark halo. Optical depths
toward the b... | 1995-06-02 | 2007-05-23 | [
"astro-ph",
"hep-ph"
] | K. Griest, C. Alcock, R.A. Allsman, T.S. Axelrod, D.P. Bennett, K.H.
Cook, K.C. Freeman, J. Guern, M. Lehner, S.L. Marshall, S. Perlmutter, B.A.
Peterson, M.R. Pratt, P.J. Quinn, A.W. Rodgers, C.W. Stubbs, W. Sutherland,
D. Welch (The MACHO Collaboration) |
astro-ph/9506015 | Neutrino decoupling in the early Universe | A calculation of neutrino decoupling in the early Universe, including full
Fermi-Dirac statistics and electron mass dependence in the weak reaction rates,
is presented. We find that after decoupling, the electron neutrinos contribute
0.83\% more to the relativistic energy density than in the standard scenario,
where ne... | 1995-06-02 | 2010-01-15 | [
"astro-ph",
"hep-ph"
] | Steen Hannestad and Jes Madsen |
astro-ph/9506012 | Existence and interpretation of smooth cosmic-ray dominated shock
structures in supernova remnants | Studies of energetic particle acceleration at collisionless shocks by the
diffusive shock acceleration process indicate that completely smooth cosmic ray
dominated shock structures are possible. The existence of these is discussed
and conditions for their existence derived. It is shown that such solutions
cannot domina... | 1995-06-02 | 2011-05-23 | [
"astro-ph"
] | Drury L O'C, V\"olk H J and Berezhko E G |
astro-ph/9506013 | NEUTRINO SPIN AND FLAVOUR CONVERSION AND OSCILLATIONS IN MAGNETIC FIELD | A review of the neutrino conversion and oscillations among the two neutrino
species (active and sterile) induced by strong twisting magnetic field is
presented and implications to neutrinos in neutron star, supernova, the Sun and
interstellar galactic media are discussed. The ``cross-boundary effect" (CBE)
(i.e., a pos... | 1995-06-02 | 2008-02-03 | [
"astro-ph"
] | A.M.Egorov, G.G.Likhachev, A.I.Studenikin |
astro-ph/9506010 | QSO HOST GALAXIES AT Z=2.3 | Images are discussed of six QSOs at z=2.3, one QSO-like IRAS source at z=2.3,
and one QSO at z=1.1, taken with resolution 0.6 to 0.9 arcsec. Five of the QSOs
are radio-quiet. All QSOs except one are just resolved, while the IRAS source
has definite structure. In some cases, part of the QSO fuzz appears to be a
close co... | 1995-06-02 | 2009-10-28 | [
"astro-ph"
] | J.B. Hutchings |
astro-ph/9506002 | Supersonic Turbulence and the Fragmentation of a Cold Medium | The role played by velocity fields in the fragmentation of a cold medium and
in the formation of protostars is studied.
The velocity field is modeled with a compressible turbulent flow. A
supersonic turbulent velocity field can fragment the medium into clumps of mass
smaller than a local Jeans' mass, and therefore st... | 1995-06-01 | 2015-06-24 | [
"astro-ph"
] | Paolo Padoan (Theoretical Astrophysics Center - Copenhagen - Denmark) |
astro-ph/9506006 | Physical constraints on the halo mass function | We analyse the effect of two relevant physical constraints on the mass
multiplicity function of dark matter halos in a Press--Schechter type
algorithm. Considering the random--walk of linear Gaussian density fluctuations
as a function of the smoothing scale, we simultaneously i) account for mass
semi--positivity and ii... | 1995-06-01 | 2015-06-24 | [
"astro-ph"
] | C. Porciani, F. Ferrini, F. Lucchin and S. Matarrese |
astro-ph/9506003 | The epoch of structure formation in blue mixed dark matter models | Recent data on the high--redshift abundance of damped Ly$\alpha$ systems are
compared with theoretical predictions for `blue' (i.e. $n>1$) Mixed Dark Matter
models. The results show that decreasing the hot component fraction
$\Omega_\nu$ and/or increasing the primordial spectral index $n$ implies an
earlier epoch of co... | 1995-06-01 | 2015-06-24 | [
"astro-ph"
] | Stefano Borgani, Francesco Lucchin, Sabino Matarrese and Lauro
Moscardini |
astro-ph/9506001 | RR LYRAE VARIABLE STARS: PULSATIONAL CONSTRAINTS RELEVANT TO THE
OOSTERHOFF CONTROVERSY | A solution to the old Oosterhoff controversy is proposed on the basis of a
new theoretical pulsational scenario concerning RR Lyrae cluster variables
(Bono and coworkers). We show that the observed constancy of the lowest
pulsation period in both Oosterhoff type I (OoI) and Oosterhoff type II (OoII)
prototypes (M3, M15... | 1995-06-01 | 2009-10-28 | [
"astro-ph"
] | G. Bono, F. Caputo, V. Castellani and M. Marconi |
astro-ph/9506004 | The Universal Rotation Curve of Spiral Galaxies: I. the Dark Matter
Connection | We use a homogeneous sample of about 1100 rotation curves (RCs) and relative
surface photometry to investigate (out to 2 optical radii and over 6 mag) the
main mass structure properties of spirals. We confirm the strong dependence on
luminosity for both the profile and the amplitude of RCs. Spiral RCs show the
striking... | 1995-06-01 | 2015-06-24 | [
"astro-ph"
] | M.Persic, P.Salucci, and F.Stel |
astro-ph/9506007 | Mass loss in metal deficient Red Giants | We investigate the final fate of metal deficient (MD) H burning Red Giants
under various assumptions about the amount of mass loss. Adopting a metallicity
Z= 10^(-8), we follow the evolution of 0.8 Mo models from the Main Sequence
phase till the onset of the He flash or the final cooling as a He White Dwarf,
according ... | 1995-06-01 | 2011-05-23 | [
"astro-ph"
] | V. Castellani and M. Romaniello (Dip. Fisica - Pisa --- Scuola Normale
Superiore - Pisa) |
astro-ph/9506009 | On the Injection Energy Distibution of Ultra-High-Energy Cosmic Rays | We investigate the injection spectrum of ultra-high-energy (>10^{15} eV)
cosmic rays under the hypotheses that (1) these cosmic rays are protons and (2)
the sources of these cosmic rays are extra-galactic and are homogeneously
distributed in space. The most puzzling aspect of the observed
ultra-high-energy cosmic ray s... | 1995-06-01 | 2009-10-28 | [
"astro-ph"
] | James Geddes, Theodore C. Quinn, and Robert M. Wald (University of
Chicago) |
astro-ph/9506005 | On the interpretation of clustering from the angular APM Galaxy Survey | We analyze the uncertainties in the amplitudes of the spatial correlation
functions estimated from angular correlations in a sample from the APM Galaxy
Survey, with $b_J=17-20$. We model the uncertainties in the selection function
and in the evolution of clustering. In particular we estimate $\sigma_8^{APM}$,
the rms g... | 1995-06-01 | 2009-10-28 | [
"astro-ph"
] | Enrique Gazta\~naga |
astro-ph/9505148 | THE POLARIZED SPECTRUM OF THE FE II-RICH BAL QSO, IRAS 07598+6508 | We present IUE spectrophotometry and optical spectropolarimetry of the
ultraluminous, extreme FeII-emitting QSO IRAS 07598+6508. We find broad
absorption troughs from high- and low-ionization species, showing that this
object is a member of the class of rare low-ionization BAL QSOs. Compared with
non-BAL QSOs, the spec... | 1995-06-01 | 2009-10-28 | [
"astro-ph"
] | Dean C. Hines and Beverley J. Wills (University of Texas at Austin) |
astro-ph/9506008 | ON THE MEASUREMENT OF A COSMOLOGICAL DIPOLE IN THE PHOTON NUMBER COUNTS
OF GAMMA-RAY BURSTS | If gamma-ray bursts are cosmological or in a halo distribution their
properties are expected to be isotropic (at least to 1st order). However, our
motion with respect to the burst parent population (whose proper frame is
expected to be that of the Cosmic Microwave Background (CMB), or that of a
static halo) will cause ... | 1995-06-01 | 2009-10-28 | [
"astro-ph"
] | C.A. Scharf, K. Jahoda and E. Boldt (NASA Goddard Space Flight Center) |
astro-ph/9505146 | The gamma-ray burst GB 920622 | We have analyzed the Ulysses, BATSE, and COMPTEL spectral data from the
$\gamma$-ray burst of June 22, 1992 (GB 920622). COMPTEL data reveal a hard to
soft evolution within the first pulse of the burst, while the mean hardness
ratios of the three pulses are the same. Unlike the single instrument spectra,
the composite ... | 1995-05-31 | 2016-08-15 | [
"astro-ph"
] | J. Greiner, M. Sommer, N. Bade, G.J. Fishman, L.O. Hanlon, K. Hurley,
R.M. Kippen, C. Kouveliotou, R. Preece, J. Ryan, V. Sch\"onfelder, O.R.
Williams, C. Winkler, M. Boer, M. Niel |
astro-ph/9505144 | Radio-optical Orientation of Elliptical Galaxies | Present knowledge of the distribution of the angle between major optical and
radio axes of early-type galaxies is reviewed. While brightest galaxies in
Abell clusters show a bimodal distribution of this angle, with both parallel
and vertical alignment, ellipticals in general only show a weak preference for
vertical ali... | 1995-05-31 | 2007-05-23 | [
"astro-ph"
] | Heinz J. Andernach (IUE Observatory, Spain) |
astro-ph/9505143 | Small scale CMB fluctuations as a probe of the mass of Dark Matter
particles | The CMB anisotropy on arc second range is examined to test the power spectrum
of perturbations in the small scale region and, in particular, to estimate the
mass of dominant dark matter particles. It is shown that for the simplest
evolutionary history with standard recombination, three and four beam
observations could ... | 1995-05-31 | 2009-10-28 | [
"astro-ph"
] | Andrei G. Doroshkevich and Raffaella Schneider |
astro-ph/9505147 | QUASARS AND LARGE SCALE STRUCTURE OF THE UNIVERSE | The majority of bright distant quasars $(z {}^{>}_{\sim} 1)$ may form in
massive mergers appearing in compact galaxy groups in/and young clusters. The
expected tests are (i) large correlation signal for medium-$z$ QSOs $(1 < z <
2)$ and (ii) direct search for quasar groups (QGs) indicating positions of
distant pre-supe... | 1995-05-31 | 2009-10-28 | [
"astro-ph"
] | V.N.Lukash (Astro Space Center, Lebedev Physical Institute, Moscow) |
astro-ph/9505145 | Search for GRB counterparts | A state-of-the-art review is given on the search for counterparts of
$\gamma$-ray bursts. Particular emphasis is put on the search for flaring
counterparts, i.e. emission during or shortly after the gamma-ray emission.
With BACODINE working now for nearly one year, some of the highlights of the
herewith triggered follo... | 1995-05-31 | 2009-10-28 | [
"astro-ph"
] | J. Greiner |
astro-ph/9505137 | Lunar Occultation of MACHOs | Lunar occultation can be used to measure the proper motions of some of the
long time scale microlensing events, $t_{e} \gsim 70$ days, now being detected
toward the Galactic bulge. The long events are difficult to explain within the
context of standard models of the mass distribution and dynamics of the Galaxy.
Han & G... | 1995-05-30 | 2009-10-28 | [
"astro-ph"
] | Cheongho Han, Vijay K. Narayanan, and Andrew Gould |
astro-ph/9505142 | Filament Statistics: A Quantitative Comparison of Cold + Hot and Cold
Dark Matter Cosmologies with CfA1 Data | A new class of geometric statistics for analyzing galaxy catalogs is
presented. {\it Filament statistics} quantify filamentarity and planarity in
large scale structure in a manner consistent with catalog visualizations. These
statistics are based on sequences of spatial links which follow local
high-density structures.... | 1995-05-30 | 2007-05-23 | [
"astro-ph"
] | Romeel Dav\'e (UCSC), Doug Hellinger (UCSC), Richard Nolthenius
(UCSC), Joel Primack (UCSC), Anatoly Klypin (NMSU) |
astro-ph/9505140 | Scalar Electrodynamics and Primordial Magnetic Fields | A primordial magnetic field may be generated during an inflationary period if
conformal invariance is broken. We reexamine and generalize previous results
about the magnetic field produced by couplings of the form $R^n
F_{\mu\nu}F^{\mu\nu}$. We show that the amplitude of the magnetic field depends
strongly on $n$. For ... | 1995-05-30 | 2009-10-28 | [
"astro-ph",
"gr-qc"
] | F.D. Mazzitelli and F.M. Spedalieri |
astro-ph/9505135 | Spectral Indices in Cooling Flow Galaxies: Evidence for Star Formation | Through the study of two absorption spectral features in the optical range
(Mg2 and the 4000 A break), we find evidence for star formation in the inner
regions of cooling-flow galaxies. The application of simple stellar population
models reveals that the measured indices are explained if a relatively small
fraction of ... | 1995-05-30 | 2015-06-24 | [
"astro-ph"
] | N. Cardiel, J. Gorgas, and A. Aragon-Salamanca |
astro-ph/9505141 | Cosmic Ray Positrons at High Energies: A New Measurement | We present a new measurement of the cosmic-ray positron fraction e+/(e+ + e-)
obtained from the first balloon flight of the High Energy Antimatter Telescope
(HEAT). Using a magnet spectrometer combined with a transition radiation
detector, an electromagnetic calorimeter, and time-of-flight counters we have
achieved a h... | 1995-05-30 | 2012-08-27 | [
"astro-ph"
] | HEAT Collaboration (S.W. Barwick, J.J. Beatty, C.R. Bower, C. Chaput,
S. Coutu, G. de Nolfo, D. Ficenec, J. Knapp, D.M. Lowder, S. McKee, D.
Muller, J.A. Musser, S.L. Nutter, E. Schneider, S.P. Swordy, K.K. Tang, G.
Tarle, A.D. Tomasch, E. Torbet) |
astro-ph/9505136 | SIMULATING LARGE-SCALE STRUCTURE FORMATION FOR BSI POWER SPECTRA | A double inflationary model provides perturbation spectra with enhanced power
at large scales (Broken Scale Invariant perturbations -- BSI), leading to a
promising scenario for the formation of cosmic structures. We describe a series
of high-resolution PM simulations with a model for the thermodynamic evolution
of bary... | 1995-05-30 | 2007-05-23 | [
"astro-ph"
] | V. Mueller |
astro-ph/9505139 | The Cosmic Background Radiation, Snowmass Workshop | Observations of the Cosmic Microwave background have provided many of the
most powerful constraints we have on cosmology and events in the early
universe. The spectrum and isotropy of CBR have long been a pillar of Big Bang
models. The discovery of low levels on anisotropy has provided new information
and tools for our... | 1995-05-30 | 2016-08-30 | [
"astro-ph"
] | George F. Smoot (Berkeley) |
astro-ph/9505138 | COMPARATIVE STUDY OF A [WC 6] NUCLEUS WITH OTHER EMISSION-LINES NUCLEI
OF PLANETARY NEBULAE | The central star (CSPN) of the planetary nebula M 1-25 (PN G 4.9+4.9) is
classified as a [WC 6] star, the only CSPN of this subclass known at this time.
A comparison with the other emission-lines CSPN (the [WC]-class and the 'weak
emission-lines stars' or {\em wels}-class) shows that (1) the characteristics
of this [WC... | 1995-05-30 | 2007-05-23 | [
"astro-ph"
] | A. Acker, S. K. Gorny and F. Cuisinier |
astro-ph/9505133 | The ESO Key-Programme ``A Homogeneous Bright QSO Survey'' - I The
Methods and the ``Deep'' Fields | This is the first paper in a series aimed at defining a statistically
significant sample of QSOs in the range $ 15 < B < 18.75$ and $ 0.3 < z < 2.2$.
The selection is carried out using direct plates obtained at the ESO and UK
Schmidt Telescopes, scanned with the COSMOS facility and searched for objects
with an ultravio... | 1995-05-29 | 2007-05-23 | [
"astro-ph"
] | S. Cristiani, F. La Franca, P. Andreani, A. Gemmo, P. Goldschmidt, L.
Miller, R. Vio, C. Barbieri, L. Bodini, A. Iovino, M. Lazzarin, R. Clowes, H.
MacGillivray, Ch. Gouiffes, C. Lissandrini, A. Savage |
astro-ph/9505134 | Magnetic Monopoles as the Highest Energy Cosmic Ray Primaries | We suggest that the highest energy $ \gsim 10^{20} eV$ cosmic ray primaries
may be relativistic magnetic monopoles. Motivations for this hypothesis are
that conventional primaries are problematic, while monopoles are naturally
accelerated to $E \sim 10^{20} eV$ by galactic magnetic fields. By matching the
cosmic monopo... | 1995-05-29 | 2009-10-28 | [
"astro-ph",
"hep-ph"
] | Thomas W. Kephart and Thomas J. Weiler |
astro-ph/9505132 | THE CLUSTERING OF QUASARS | We have investigated the spatial distribution of quasars and its relationship
with redshift by using the two-point correlation function, the variance of cell
counts and the conditional density as a function of redshift. By comparing our
results with those found by other authors we conclude that quasars have a
correlati... | 1995-05-29 | 2007-05-23 | [
"astro-ph"
] | P. Andreani, S. Cristiani and F. La Franca (Dip.Astron. Univ.Padova) |
astro-ph/9505131 | CLUSTERING PROPERTIES OF THE LY$\alpha$ CLOUDS | The spectra of the QSOs PKS2126-158 ($z_{em}=3.27$) and Q0055-269
($z_{em}=3.66$) have been observed at high resolution ($2.2 - 2.7 \times
10^4$). Significant clustering, with $\xi \simeq 1$ at $\Delta v=100$ km
s$^{-1}$, is detected in both cases for lines with $\log N_{HI} \geq 13.8$. A
similar result is obtained ana... | 1995-05-29 | 2007-05-23 | [
"astro-ph"
] | S. Cristiani, S. D'Odorico, V. D'Odorico, A. Fontana, E. Giallongo, S.
Savaglio |
astro-ph/9505130 | The Microlensing and Halo Models of the Galaxy | We investigated the dependence of the optical depth $\tau$ of the
microlensing events on model parameters of the Galactic halo. We only consider
Galactic mass models in which the rotation curve inside the Sun is compatible
with the observation and LMC is bound to the Galaxy. It is found that $\tau$
varies up to a facto... | 1995-05-29 | 2015-06-24 | [
"astro-ph"
] | Yukitoshi Kan-ya, Ryoichi Nishi and Takashi Nakamura |
astro-ph/9505129 | CCD PHOTOMETRY OF VARIABLE STARS IN THE GLOBULAR CLUSTER RU 106 | BV photometry is presented for 12 RR Lyr variables discovered in the
presumably young galactic globular cluster Ruprecht 106. All variables are type
RRab, and their periods span a narrow range from 0.574 to 0.652 day. We report
also on the discovery of 3 SX Phe variables among the cluster blue stragglers.
A likely back... | 1995-05-27 | 2009-10-28 | [
"astro-ph"
] | Janusz Kaluzny, Wojciech Krzeminski, Beata Mazur |
astro-ph/9505125 | Structure of Primordial Gravitational Waves Spectrum in a Double
Inflationary Model | The gravitational waves (GW) background generated in a double inflationary
model, with two scalar fields mutually interacting through gravity only, and
its relative contribution $T/S$ to large-angle temperature fluctuations of the
relic microwave background are investigated in detail. The relation between
$T/S$ and the... | 1995-05-27 | 2009-10-28 | [
"astro-ph",
"gr-qc",
"hep-th"
] | David Polarski and Alexei A. Starobinsky |
astro-ph/9505128 | ARE THE NEARBY AND PHOTOMETRIC STELLAR LUMINOSITY FUNCTIONS DIFFERENT? | The stellar luminosity function derived from the sample of stars within
5.2--20~pc is the nearby luminosity function. The luminosity function obtained
from deep low spatial resolution surveys to distances of typically 100--200~pc
is the photometric luminosity function. We obtain and tabulate a best estimate
of the pare... | 1995-05-27 | 2009-10-28 | [
"astro-ph"
] | Pavel Kroupa |
astro-ph/9505126 | A study of the Orion cometary cloud L1616 | With its cometary appearance and a reflection nebula near its edge facing
some bright Orion stars, the Lynd's cloud L1616 shows ample evidence for being
affected by one or more of these massive stars. To estimate its mass and star
formation efficiency as well as to determine if it is gravitationally bound, we
mapped th... | 1995-05-27 | 2015-06-24 | [
"astro-ph"
] | B.Ramesh |
astro-ph/9505127 | AN IMPROVED MEASURE OF QUASAR ORIENTATION | Radio core dominance, usually measured by R, the rest frame ratio of core to
lobe flux density, has been used as an indicator of Doppler boosting of
quasars' radio jets and hence the inclination of the central engine's spin axis
to the line of sight. The use of lobe flux density as a means of normalizing
the boosted co... | 1995-05-27 | 2009-10-28 | [
"astro-ph"
] | Beverley J. Wills and M. S. Brotherton (Univ. of Texas at Austin, USA) |
astro-ph/9505122 | Optical structure and polarization of the western hot spot of Pictor A | HST images of the western hot spot of the nearby FRII radio galaxy Pictor A
resolve the hot spot into an amorphous region of highly polarized wisps. The
high polarization (>~ 50%) indicates that the optical emission is synchrotron
radiation and that the magnetic field structure has been well resolved. The
magnetic fiel... | 1995-05-26 | 2016-08-30 | [
"astro-ph"
] | R.C. Thomson, P. Crane, C.D. Mackay |
astro-ph/9505120 | The Doppler Peaks from Cosmic Texture | We compute the angular power spectrum of temperature anisotropies on the
microwave sky in the cosmic texture theory, with standard recombination
assumed. The spectrum shows `Doppler' peaks analogous to those in scenarios
based on primordial adiabatic fluctuations such as `standard CDM', but at quite
different angular s... | 1995-05-26 | 2016-08-24 | [
"astro-ph"
] | R.G. Crittenden and N.G. Turok (Princeton University) |
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