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/9508110 | Galactic Center Molecular Arms, Ring and Expanding Shells.I. Kinematical
Structures in Longitude-Velocity Diagrams | Analyzing the (l, b, Vlsr) data cube of 13CO(J=1-0) line emission obtained by
Bally et al, we have investigated the molecular gas distribution and kinematics
in the central +/-1 deg (150 pc) region of the Galaxy. We have applied the
pressing method to remove the local- and foreground-gas components at low
velocities in... | 1995-08-24 | 2008-02-03 | [
"astro-ph"
] | Yoshiaki SOFUE |
astro-ph/9508111 | Galactic Center Molecular Arms, Ring and Expanding Shells. II -
Expanding Molecular Shell - | We investigate the three-dimensional structure of the so-called ``200-pc
expanding molecular ring" in the Galactic Center by analyzing (b, Vlsr)
diagrams of the 13CO(J=1-0) line emission from the Bell-Telephone Laboratory
survey. We show that the b-v features can be fitted by a spheroidal shell
pinched at the equator (... | 1995-08-24 | 2007-05-23 | [
"astro-ph"
] | Yoshiaki Sofue |
astro-ph/9508103 | The microlensing events in Q2237+0305A: No case against small
masses/large sources | It is demonstrated that the 1988-90 microlensing events in image A of
Q2237+0305 reported by Racine (1992) do not exclude microlensing models with
very low average mass, making the source radius larger than the projected
Einstein radius $\eta_0$ (Refsdal and Stabell 1991, 1993). This is contrary to
what has been claime... | 1995-08-23 | 2007-05-23 | [
"astro-ph"
] | S. V. H. Haugan (Institute of Theoretical Astrophysics, University of
Oslo) |
astro-ph/9508104 | The velocity dispersion profiles of clusters of galaxies: a cosmological
test and the sampling effect | In this paper we investigate the velocity dispersion profiles of clusters of
galaxies for seven cosmological models. One model is the SCDM model, and the
others are six low-density models with the density parameter $\Omega=0.1$, 0.2
or 0.3 and with or without a cosmological constant $\Lambda=1-\Omega$. We find
that the... | 1995-08-23 | 2015-06-24 | [
"astro-ph"
] | Y.P. Jing and G. Boerner (MPA) |
astro-ph/9508101 | The Nature of Cosmic Time | Hamilton-Jacobi theory provides a natural starting point for a covariant
description of the gravitational field. Using a spatial gradient expansion, one
may solve for the phase of the wavefunction by using a line-integral in
superspace. Each contour of integration corresponds to a particular choice of
time-hypersurface... | 1995-08-23 | 2007-05-23 | [
"astro-ph",
"gr-qc"
] | D. S. Salopek |
astro-ph/9508105 | K Giants in Baade's Window. I. Velocity and Line-strength Measurements | This is the first in a series of papers in which we analyze
medium--resolution spectra of over 400 K and M giants in Baade's Window. Our
sample was selected from the proper motion study of Spaenhauer et al. [AJ, 103,
297 (1992)]. We have measured radial velocities for most of the sample, as well
as line--strength indic... | 1995-08-23 | 2009-10-28 | [
"astro-ph"
] | D. M. Terndrup (Ohio State), E. M. Sadler (University of Sydney), and
R. M. Rich (Columbia University) |
astro-ph/9508102 | Cosmic rays V. The nonthermal radio emission of the old nova GK Per - a
signature of hadronic interactions? | Using the model of particle acceleration in shocks in stellar winds developed
by Biermann (1993) and Biermann and Cassinelli (1993) we demonstrate that the
nonthermal radio emission spectrum from the cataclysmic variable binary star GK
Per can be interpreted consistently. We propose that the radio spectrum results
from... | 1995-08-23 | 2007-05-23 | [
"astro-ph"
] | Peter L. Biermann, Richard G. Strom, Heino Falcke |
astro-ph/9508106 | Effects of Random Density Fluctuations on Matter-Enhanced Neutrino
Flavor Transitions in Supernovae and Implications for Supernova Dynamics and
Nucleosynthesis | We calculate the effects of random density fluctuations on two-neutrino
flavor transformations (${\nu}_{\tau(\mu)} \rightleftharpoons {\nu}_e$) in the
post-core-bounce supernova environment. In particular, we follow numerically
the flavor evolution of neutrino states propagating through a stochastic field
of density fl... | 1995-08-23 | 2010-01-15 | [
"astro-ph",
"hep-ph",
"nucl-th"
] | F. N. Loreti, Y.-Z. Qian, G. M. Fuller, and A. B. Balantekin |
astro-ph/9508097 | The metal line systems in HS1700+6416: Evidence for inhomogeneities | We present a high S/N ratio optical spectrum of the bright quasar
HS1700+6416. These data usefully complement the UV HST data from Vogel and
Reimers (1995). We analyse the metal line systems using photo-ionization models
allowing for inhomogeneities in the gas. The models are able to reproduce
within a factor of two th... | 1995-08-22 | 2007-05-23 | [
"astro-ph"
] | Patrick Petitjean, Ruediger Riediger, Michael Rauch |
astro-ph/9508098 | The Distribution of Dark Mass in Galaxies: Techniques, Puzzles, and
Implications for Lensing | Gravitational lensing is one of a number of methods used to probe the
distribution of dark mass in the Universe. On galactic scales, complementary
techniques include the use of stellar kinematics, kinematics and morphology of
the neutral gas layer, kinematics of satellites, and morphology and temperature
profile of X-r... | 1995-08-22 | 2008-02-03 | [
"astro-ph"
] | Penny D. Sackett (Kapteyn Astronomical Institute, Groningen) |
astro-ph/9508100 | Slicing Through Multicolor Space: Galaxy Redshifts From Broadband
Photometry | As a means of better understanding the evolution of optically selected
galaxies we consider the distribution of galaxies within the multicolor space
$U$, $B_J$, $R_F$ and $I_N$. We find that they form an almost planar
distribution out to $B_J =22.5$ and $z<0.3$. The position of a galaxy within
this plane is dependent o... | 1995-08-22 | 2008-11-26 | [
"astro-ph"
] | A.J. Connolly, I. Csabai, A.S. Szalay, D.C. Koo, R.G. Kron, and J.A.
Munn |
astro-ph/9508099 | The Connection between Submillimeter Continuum Flux and Binary
Separation in Young Binaries: Evidence of Interaction between Stars and Disks | We present 800 micron continuum photometry of pre-main-sequence binary stars
with projected separations a_p < 150 AU in the Sco-Oph star-forming region.
Combining our observations with published 1300 micron photometry, we find that
binaries in Sco-Oph with 1 < a_p < 50--100 AU have lower submillimeter fluxes
than wider... | 1995-08-22 | 2016-08-30 | [
"astro-ph"
] | Eric L. N. Jensen (Wisconsin), Robert D. Mathieu (Wisconsin), and Gary
A. Fuller (NRAO) |
astro-ph/9508095 | Improper Motions in Lensed QSOs | We argue that individual images in multiple-image QSOs could easily have
substructure at the level of $0.1''$ (i.e., unresolvable even with HST);
microlensing within such substructure would cause centroid shifts, observable
even from the ground as pseudo proper motions. We present a model of the
four-image system 2237+... | 1995-08-21 | 2009-10-28 | [
"astro-ph"
] | L.L.R. Williams and P. Saha |
astro-ph/9508096 | A Radio--Optical Reference Frame VIII. CCD observations from KPNO and
CTIO: internal calibration and first results | In this pilot investigation, precise optical positions in the FK5 system are
presented for a set of 16 compact extragalactic radio sources, which will be
part of the future radio--optical reference frame. The 0.9 m KPNO and CTIO
telescopes equipped with 2K CCD's have been used for this project. The
astrometric properti... | 1995-08-21 | 2009-10-28 | [
"astro-ph"
] | N.Zacharias, C.de Vegt, L.Winter, K.J.Johnston |
astro-ph/9508094 | An Indicator of Nonlinear Gravitational Clustering | Alignment of velocity and acceleration before shell crossing, and later
misalignment are used to define velocity contrast, an indicator of dynamical
state of matter undergoing gravitational collapse. We use this to study bias in
clustering properties of dynamically nonlinear mass. | 1995-08-21 | 2007-05-23 | [
"astro-ph"
] | J.S.Bagla |
astro-ph/9508091 | Gamma-Ray Bursts from High Velocity Neutron Stars | We investigate the viability of the Galactic halo model of $\gamma$-ray
bursts by calculating the spatial distribution of neutron stars born with high
velocities in the Galactic disk, and comparing the resulting brightness and
angular distribution with the BATSE data. We find that the Galactic halo model
can reproduce ... | 1995-08-20 | 2009-10-28 | [
"astro-ph"
] | Tomasz Bulik and Donald Q. Lamb |
astro-ph/9508093 | Limits on Dust in Rich Clusters of Galaxies from the Color of Background
Quasars | I measure the V-I color distribution of two samples of radio-selected
quasars. Quasars from one sample are projected on the sky within 1 degree of a
rich foreground Abell cluster of galaxies, while quasars from the other sample
are more than 3 degrees from any such cluster . There is no significant
difference between t... | 1995-08-20 | 2009-10-28 | [
"astro-ph"
] | Dan Maoz (Tel-Aviv University) |
astro-ph/9508092 | Galactic Models of Gamma-Ray Bursts | We describe observational evidence and theoretical calculations which support
the high velocity neutron star model of gamma-ray bursts. We estimate the
energetic requirements in this model, and discuss possible energy sources. we
also consider radiative processes involved in the bursts. | 1995-08-20 | 2009-10-28 | [
"astro-ph"
] | Donald Q. Lamb, Tomasz Bulik, and Paolo S. Coppi |
astro-ph/9508088 | Extragalactic Magnetic Field and the Highest Energy Cosmic Rays | The strength and spectrum of the extragalactic magnetic field are still
unknown. Its measurement would help answer the question of whether galactic
fields are purely a primordial relic or were dynamically enhanced from a much
smaller cosmological seed field. In this letter, we show that the composition,
spectrum, and d... | 1995-08-19 | 2009-10-28 | [
"astro-ph"
] | Sangjin Lee, Angela Olinto, and Guenter Sigl (The University of
Chicago) |
astro-ph/9508090 | Observational Tests of One-Bubble Open Inflationary Cosmological Models | Motivated by recent studies of the one-bubble inflationary scenario, simple
open cold dark matter models are tested for consistency with cosmological
observations. The initial perturbation spectrum is derived by solving for the
evolution of fluctuations in an open inflationary stage. A likelihood analysis
is performed ... | 1995-08-19 | 2009-10-28 | [
"astro-ph"
] | Kazuhiro Yamamoto and Emory F. Bunn |
astro-ph/9508082 | Strong gravitational field light deflection in binary systems containing
a collapsed star | Large light deflection angles are produced in the strong gravitational field
regions around neutron stars and black holes. In the case of binary systems,
part of the photons emitted from the companion star towards the collapsed
object are expected to be deflected in the direction of the earth. Based on a
semi-classical... | 1995-08-18 | 2015-06-24 | [
"astro-ph"
] | S. Campana (Osservatorio astronomico di Brera), A. Parodi (Universita`
``la Sapienza'' di Roma) & L. Stella (Osservatorio astronomico di Brera) |
astro-ph/9508083 | A Search for Ultra-High Energy Counterparts to Gamma-Ray Bursts | A small air shower array operating over many years has been used to search
for ultra-high energy (UHE) gamma radiation ($\geq 50$ TeV) associated with
gamma-ray bursts (GRBs) detected by the BATSE instrument on the Compton
Gamma-Ray Observatory (CGRO). Upper limits for a one minute interval after each
burst are present... | 1995-08-18 | 2009-10-28 | [
"astro-ph"
] | S. P. Plunkett, M. Delaney, B. McBreen, K. J. Hurley, C. T. O'Sullivan |
astro-ph/9508087 | MSAM1-94: Repeated Measurement of Medium-Scale Anisotropy in the Cosmic
Microwave Background Radiation | The second flight of the Medium Scale Anisotropy Measurement (MSAM1-94)
observed the same field as the first flight (MSAM1-92) to confirm our earlier
measurement of cosmic microwave background radiation (CMBR) anisotropy. This
instrument chops a 30\arcmin\ beam in a 3 position pattern with a throw of
$\pm40\arcmin$, an... | 1995-08-18 | 2009-10-28 | [
"astro-ph"
] | E. S. Cheng, D. A. Cottingham, D. J. Fixsen, C. A. Inman, M. S.
Kowitt, S. S. Meyer, L. A. Page, J. L. Puchalla, J. E. Ruhl, and R. F.
Silverberg |
astro-ph/9508086 | The Local Abundance of $^3$He: A Confrontation Between Theory and
Observation | Determinations of the \he3 concentrations in Galactic matter serve to impose
interesting and important constraints both on cosmological models and on models
of Galactic chemical evolution. At present, observations of \he3 in the solar
system and in the interstellar medium today suggest that the \he3 abundance has
not i... | 1995-08-18 | 2009-09-15 | [
"astro-ph"
] | Sean T. Scully, Michel Casse, Keith A. Olive, D.N. Schramm, J. Truran,
and E. Vangioni-Flam |
astro-ph/9508081 | Hydrodynamic Time Scales and Temporal Structure of GRBs | We calculate the hydrodynamic time scales for a spherical ultra-relativistic
shell that is decelerated by the ISM and discuss the possible relations between
these time scales and the observed temporal structure in $\gamma$-ray bursts.
We suggest that the bursts' duration is related to the deceleration time, the
variabi... | 1995-08-18 | 2009-10-28 | [
"astro-ph"
] | Re'em Sari and Tsvi Piran |
astro-ph/9508085 | Magnetohydrodynamic Turbulence in Accretion Disks | Recent work on the structure of magnetic fields in a turbulent medium gives
predictions for the properties of the magnetic flux tubes as a function of the
Mach number and scale of the turbulence, and the resistivity and viscosity of
the fluid. Here I discuss the implications of this work for accretion disks. I
show tha... | 1995-08-18 | 2010-04-23 | [
"astro-ph"
] | Ethan T. Vishniac (University of Texas) |
astro-ph/9508089 | Galactic extinction and Abell clusters | In this paper, we present the results of comparing the angular distribution
of Abell clusters with Galactic HI measurements. For most subsamples of
clusters considered, their positions on the sky appear to be anti-correlated
with respect to the distribution of HI column densities. The statistical
significance of these ... | 1995-08-18 | 2015-06-24 | [
"astro-ph"
] | R.C. Nichol and A.J. Connolly |
astro-ph/9508084 | The Dynamical Properties of Stellar Systems in the Galactic Disc | We postulate that most stars are born in aggregates of binary systems which
are dynamically equivalent to the `dominant mode cluster'. The initial binary
orbits are consitent with pre-main sequence data. Stellar masses are paired at
random from the KTG(1.3) mass function. We develop a simple model which
establishes the... | 1995-08-18 | 2015-06-24 | [
"astro-ph"
] | Pavel Kroupa |
astro-ph/9508074 | Lognormal Properties of SGR 1806-20 and Implications for Other SGR
Sources | The time interval between successive bursts from SGR 1806-20 and the
intensity of these bursts are both consistent with lognormal distributions.
Monte Carlo simulations of lognormal burst models with a range of distribution
parameters have been investigated. The main conclusions are that while most
sources like SGR 180... | 1995-08-17 | 2009-10-28 | [
"astro-ph"
] | K. J. Hurley, B. McBreen, M. Delaney, A. Britton |
astro-ph/9508080 | Large Scale Velocity Fields Present and Future: Making Sense of the data | The large scale velocity field was sampled recently by two independent
methods: the supernovae type Ia light curve shapes (Riess, Press \& Kirshner)
and the Abell Cluster Catalog brightest cluster galaxy metric luminosity (Lauer
\& Postman). The results of these investigations seem to be contradictory. I
present an ana... | 1995-08-17 | 2007-05-23 | [
"astro-ph"
] | Hume A. Feldman (Princeton) |
astro-ph/9508076 | Kinematic detection of the double nucleus in M31 | Using a spectrum obtained under moderate (of order 1 arcsecond) seeing, we
show that the double nucleus in M31 produces a strong kinematic signature even
though the individual components are not spatially resolved. The signature
consists of a significant asymmetric wing in the stellar velocity distribution
close to the... | 1995-08-17 | 2016-06-08 | [
"astro-ph"
] | J. Gerssen, K. Kuijken (Groningen) and M.R. Merrifield (Southampton) |
astro-ph/9508079 | T Tauri variability in the context of the beat-frequency model | We examine the implications of a beat frequency modulated model of T Tauri
accretion. In particular we show that measurements of the variability of
accretion generated lines can be used in conjunction with existing photometry
to obtain a measurement of the underlying photospheric and disc flux. This
provides an indepen... | 1995-08-17 | 2016-06-08 | [
"astro-ph"
] | K.W. Smith, G.F. Lewis, I.A. Bonnell |
astro-ph/9508075 | The Power Spectrum of Galaxy Density Fluctuations: Current Results and
Improved Techniques | The power spectrum of density fluctuations measured from galaxy redshift
surveys provides important constraints on models for the formation of
large-scale structure. I review current results for the 3-D power spectrum and
examine the limitations of current measurements and estimation techniques. To
span the decade of w... | 1995-08-17 | 2007-05-23 | [
"astro-ph"
] | Michael S. Vogeley |
astro-ph/9508078 | Reconstructing the Inflaton Potential --- an Overview | We review the relation between the inflationary potential and the spectra of
density (scalar) perturbations and gravitational waves (tensor perturbations)
produced, with particular emphasis on the possibility of reconstructing the
inflaton potential from observations. The spectra provide a potentially
powerful test of ... | 1995-08-17 | 2008-11-26 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | James E Lidsey, Andrew R Liddle, Edward W Kolb, Edmund J Copeland,
Tiago Barreiro and Mark Abney |
astro-ph/9508072 | Formation of Low-Mass X-ray Binaries. I. Constraints on Hydrogen-Rich
Donors at the Onset of the X-ray Phase | We identify and quantify the set of constraints that neutron star-normal star
binaries must satisfy in order to become observable LMXBs. These constraints
are related to (i) the thermal and hydrostatic equilibrium of the donors, (ii)
the degree to which the mass transfer process is conservative, and (iii) the
age of th... | 1995-08-17 | 2009-10-28 | [
"astro-ph"
] | Vassiliki Kalogera and Ronald F. Webbink (Univ. of Illinois at Urbana) |
astro-ph/9508071 | Gravitational Microlensing and the Galactic Halo | By means of extensive galactic modeling we study the implications of the more
than eighty microlensing events that have now been observed for the composition
of the dark halo of the Galaxy, as well as for other properties of the Galaxy.
We take the Galaxy to be comprised of luminous and dark disk components, a
bulge, a... | 1995-08-17 | 2008-12-18 | [
"astro-ph"
] | Evalyn I. Gates, Geza Gyuk, and Michael S. Turner |
astro-ph/9508077 | X-ray properties of head-tail radio sources in clusters of galaxies | From ROSAT imaging data we have detections and upper limits for a sample of
26 tailed radio sources in clusters of galaxies mostly from the sample of O'Dea
\& Owen (1985). All sixteen of the detected sources are unresolved in the ROSAT
PSPC images. The sources bright enough to perform X-ray spectral analysis have
power... | 1995-08-17 | 2007-05-23 | [
"astro-ph"
] | A.C. Edge H. Roettgering |
astro-ph/9508070 | Structure and Dynamics of the Coma Cluster | We examine the structure and dynamics of the galaxies in the Coma cluster
using a catalog of 552 redshifts including 243 new measurements. The velocity
distribution is shown to be non-Gaussian due to structure associated with the
group of galaxies around NGC4839, 40 arcmin SW of the cluster core. We apply a
mixture-mod... | 1995-08-16 | 2008-11-26 | [
"astro-ph"
] | Matthew Colless & Andrew M. Dunn |
astro-ph/9508066 | Grain Destruction in Interstellar Shocks | Interstellar shock waves can erode and destroy grains present in the shocked
gas, primarily as the result of sputtering and grain-grain collisions.
Uncertainties in current estimates of sputtering yields are reviewed. Results
are presented for the simple case of sputtering of fast grains being stopped in
cold gas. An u... | 1995-08-16 | 2010-04-21 | [
"astro-ph"
] | B. T. Draine |
astro-ph/9508068 | Requirements for Investigating the Connection Between Lyman Alpha
Absorption Clouds and the Large-Scale Distribution of Galaxies | We model the requirements on observational data that would allow an accurate
determination of the degree of association between Lyman alpha absorbers and
peaks in the redshift distribution of galaxies (large-scale structures like
clusters of galaxies). We compare simulated distributions of low-redshift Lyman
alpha abso... | 1995-08-16 | 2009-10-28 | [
"astro-ph"
] | Vicki L. Sarajedini (Steward Obs.), Richard F. Green (NOAO) and Buell
T. Jannuzi (KPNO) |
astro-ph/9508073 | Global Properties of Multiple Merger Remnants | Merger remnants of small groups of galaxies are contrasted with relics of
mergers of pairs of galaxies to determine which process produces objects that
best compare to real ellipticals. In both cases, the progenitors consist of
self-gravitating disks, halos, and, sometimes, bulges. Pairs of galaxies merge
from orbits t... | 1995-08-16 | 2009-10-28 | [
"astro-ph"
] | Melinda L. Weil and Lars Hernquist (UC Santa Cruz) |
astro-ph/9508063 | Stars Approaching the Substellar Limit in the alpha Persei Open Cluster | We present intermediate dispersion optical spectroscopy for seven very
low-mass stars in the alpha Per open cluster with spectral types between M3 and
M6, including the brown dwarf candidate of Rebolo et al. (1992). Our radial
velocity measurements are found to be generally consistent with the mean
cluster velocity to ... | 1995-08-16 | 2007-05-23 | [
"astro-ph"
] | M.R. Zapatero Osorio, R. Rebolo, E.L. Martin, R.J. Garcia Lopez |
astro-ph/9508069 | Stochastic Particle Acceleration near Accreting Black Holes | We consider the stochastic acceleration of particles which results from
resonant interactions with plasma waves in black hole magnetospheres. We
calculate acceleration rates and escape time scales for protons and electrons
resonating with Alfv\'en waves, and for electrons resonating with whistlers.
Assuming either a Ko... | 1995-08-16 | 2009-10-28 | [
"astro-ph"
] | Charles D. Dermer (Naval Research Laboratory), James A. Miller
(University of Alabama at Huntsville), and Hui Li (Rice University) |
astro-ph/9508064 | First analysis of an OH survey of inner Galaxy: evidence for a stellar
Bar | Part of a large survey of the inner galactic Plane ( $ | \ell | < 45^{\circ}
$ and $ | b | < 3^{\circ} $ total) in the OH 1612MHz line in search for OH/IR
stars is analysed. We find strong evidence for a central m=2 distortion based
on geometrical considerations. The observed deviation from axisymmetry cannot
be explai... | 1995-08-16 | 2007-05-23 | [
"astro-ph"
] | M.N. Sevenster |
astro-ph/9508065 | Anisotropy of the Microwave Sky at 90 GHz: Results from Python II | We report on additional observations of degree scale anisotropy at 90~GHz
from the Amundsen-Scott South Pole Station in Antarctica. Observations during
the first season with the Python instrument yielded a statistically significant
sky signal; in this paper we report the confirmation of that signal with data
taken in t... | 1995-08-16 | 2009-10-28 | [
"astro-ph"
] | J.E. Ruhl (U. Chicago), M. Dragovan (U. Chicago), S.R. Platt (Yerkes),
J. Kovac (Princeton), and G. Novak (Northwestern) |
astro-ph/9508067 | Non-Equilibrium Photodissociation Regions: Ionization-Dissociation
Fronts | We discuss the theory of coupled ionization--dissociation fronts produced
when molecular clouds are exposed to $\lambda < 1110$\AA\ radiation from hot
stars. A steady, composite structure is developed, which generally includes an
ionized outflow away from the cloud, an ionization front, a layer of
photodissociated gas,... | 1995-08-16 | 2009-10-28 | [
"astro-ph"
] | Frank Bertoldi and B. T. Draine |
astro-ph/9508060 | Comments on the Newly Discovered Advection Dominated Flows Around Black
holes and Neutron stars | We provide complete and global solutions of transonic flows around black
holes, in presence of advection, rotation, heating and cooling. We show that
for any degree of advection, there may exist two critical viscosity parameters
$\alpha_{c1, c2}$ such that for $\alpha <\alpha_{c1}$ the flow may pass through
the inner s... | 1995-08-15 | 2007-05-23 | [
"astro-ph"
] | Sandip K. Chakrabarti |
astro-ph/9508061 | Alignment of suprathermally rotating grains | It is shown, that mechanical alignment can be efficient for suprathermally
rotating grains, provided that they drift with supersonic velocities. Such a
drift should be widely spread due to both Alfv\'{e}nic waves and ambipolar
diffusion. Moreover, if suprathermal rotation is caused by grain interaction
with a radiative... | 1995-08-15 | 2015-06-24 | [
"astro-ph"
] | A.Lazarian |
astro-ph/9508062 | Occlusion Effects and the Distribution of Interstellar Cloud Sizes and
Masses | The frequency distributions of sizes of ``clouds" and ``clumps" within clouds
are significantly flatter for extinction surveys than for CO spectral line
surveys, even for comparable size ranges. A possible explanation is the
blocking of extinction clouds by larger foreground clouds (occlusion), which
should not affect ... | 1995-08-15 | 2009-10-28 | [
"astro-ph"
] | J. Scalo and A. Lazarian |
astro-ph/9508059 | Aperture Synthesis Imaging of the Circumstellar Dust Disk Around DO
Tauri | We have detected the T~Tauri star, DO Tauri, in a 0.6$''$-resolution VLA map
of 43.3 GHz ($\lambda$ = 7 mm) continuum emission. The 43 GHz flux density lies
on the same power-law slope defined by 89 to 232 GHz measurements, F$_\nu$
$\propto \nu^{\alpha}$ with index $\alpha$ = 2.39$\pm$0.23, confirming that the
43.3 GHz... | 1995-08-14 | 2009-10-28 | [
"astro-ph"
] | D.W. Koerner, C.J. Chandler, and A.I. Sargent |
astro-ph/9508057 | ROSAT PSPC observations of the infrared quasar IRAS 13349+2438: evidence
for a warm absorber with internal dust | We present spatial, temporal and spectral analyses of ROSAT Position
Sensitive Proportional Counter (PSPC) observations of the infrared loud quasar
IRAS 13349+2438. IRAS 13349+2438 is the archetypal highly-polarized radio-quiet
QSO and has an optical/infrared luminosity of about 2E46 erg/s. We detect
variability in the... | 1995-08-12 | 2015-06-24 | [
"astro-ph"
] | W.N. Brandt, A.C. Fabian, K.A. Pounds |
astro-ph/9508058 | Microlensing Induced Spectral Variability In Q2237+0305 | Several macrolensed systems exhibit photometric variability consistent with
microlensing due to objects of stellar mass located in the lens. The degree of
microlensing amplification is dependent upon the size of the source, with
smaller sources being more amplified. In general, amplification of sources
larger than an E... | 1995-08-12 | 2016-08-30 | [
"astro-ph"
] | G.F. Lewis, M.J.Irwin, P.C.Hewett |
astro-ph/9508053 | Symmetry for Nearest Stars and N-body Problem with Delay for Interaction | In the present paper some geometrical and mechanical regularities are
introduced, which constitute certain puzzles of distribution of the nearest
stars of $O,B,AO$ classes (brighter than $6.0^m$) and of the brightest galactic
objects; the regularities appear when considering in the natural, moment
related ($l,b$), ($\a... | 1995-08-11 | 2007-05-23 | [
"astro-ph"
] | Rashid Faizullin |
astro-ph/9508056 | A New 3.25 Micron Absorption Feature toward Mon R2/IRS-3 | A new 3.2--3.5~$\mu$m spectrum of the protostar Mon~R2/IRS-3 confirms our
previous tentative detection of a new absorption feature near 3.25 $\mu$m. The
feature in our new spectrum has a central wavelength of 3.256 $\mu$m (3071
cm$^{-1}$) and has a full-width at half maximum of 0.079 $\mu$m (75 cm$^{-1}$).
We explore a... | 1995-08-11 | 2009-10-28 | [
"astro-ph"
] | K. Sellgren (Ohio State University), T. Y. Brooke (Jet Propulsion
Laboratory), and R. G. Smith (University of New South Wales) |
astro-ph/9508054 | A Survey of Near Infrared Emission in Visual Reflection Nebulae | We present a survey for extended 2.2 $\mu$m emission in 20 new visual
reflection nebulae, illuminated by stars with temperatures of 3,600 --- 33,000
K. We detect extended 2.2 $\mu$m emission in 13 new nebulae, illuminated by
stars with temperatures of 6,800 -- 33,000 K. For most of these 13 nebulae we
have measured $J-... | 1995-08-11 | 2009-10-28 | [
"astro-ph"
] | K. Sellgren (Ohio State University), M. W. Werner (Jet Propulsion
Laboratory), and L. J. Allamandola (NASA Ames Research Center) |
astro-ph/9508055 | Method for Organizing the Multiwavelength Data of Radio-Loud Active
Galactic Nuclei | The broadband emission observed from radio galaxies, BL Lac objects and
quasars is thought to be produced by energetic electrons confined in plasma
blobs which are ejected from supermassive black holes at relativistic speeds.
The lower energy radio-through-optical component is almost certainly nonthermal
electron synch... | 1995-08-11 | 2008-02-03 | [
"astro-ph"
] | Reinhard Schlickeiser (Max-Planck-Institut f\"ur Radioastronomie) and
Charles D. Dermer (Naval Research Laboratory) |
astro-ph/9508052 | Probing Lyman-alpha Absorbers with Double Lines of Sight | Study of Lyman-alpha absorption lines in the spectra of double line of sight
(DLOS) quasars holds the promise of diagnosing the nature of the structures
that give rise to Lyman-alpha absorption. Based on simulations of DLOS with
various separations through a single population of absorbers, four tests have
been designed... | 1995-08-10 | 2009-10-28 | [
"astro-ph"
] | Jane C. Charlton, Christopher W. Churchill, and Suzanne M. Linder |
astro-ph/9508048 | Wave Motions In Molecular Clouds: Results in Two Dimensions | We study the linear evolution of small perturbations in self-gravitating
fluid systems in two spatial dimensions; we consider both cylindrical and
cartesian (i.e., slab) geometries. The treatment is general, but the
application is to molecular clouds. We consider a class of equations of state
which heuristically take i... | 1995-08-09 | 2009-10-28 | [
"astro-ph"
] | Curtis S. Gehman, Fred C. Adams, Marco Fatuzzo, Richard Watkins (Univ.
of Michigan) |
astro-ph/9508041 | Remote Control and Experience at ESO | Remote observing can be broadly defined as those observations where the
astronomer is not physically present at the telescope. Different
implementations presently in use include robotic telescopes, service observing
with or without eavesdropping and active remote observing. We briefly describe
the terminology, the pros... | 1995-08-09 | 2016-08-30 | [
"astro-ph"
] | Anders Wallander and Albert Zijlstra |
astro-ph/9508049 | Decaying Vacuum Energy and Deflationary Cosmology in Open and Closed
Universes | We consider a nonsingular deflationary cosmological model with decaying
vacuum energy density in universes of arbitrary spatial curvature. Irrespective
of the value of $k$, the models are characterized by an arbitrary time scale
$H_I^{-1}$ which determines the initial temperature of the universe and the
largest value o... | 1995-08-09 | 2009-10-28 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | J.A.S. Lima and M. Trodden (Brown University) |
astro-ph/9508043 | Contact Binary Stars as Standard Candles | The orbital period is a measure of the size of a contact binary star, and can
be combined with color to predict its luminosity to a fraction of stellar
magnitude. This novel application of contact binary systems currently has
limitations that we describe in the text but is potentially capable of
providing a reasonable ... | 1995-08-09 | 2007-05-23 | [
"astro-ph"
] | Slavek M. Rucinski (David Dunlap Observatory, Toronto) |
astro-ph/9508039 | Real-time Detection of Gravitational Microlensing | Real-time detection of microlensing has moved from proof of concept in 1994
to a steady stream of events this year. Global dissemination of these events by
the MACHO and OGLE collaborations has made possible intensive photometric and
spectroscopic followup from widely dispersed sites confirming the microlensing
hypothe... | 1995-08-09 | 2019-08-17 | [
"astro-ph"
] | M.R. Pratt, C. Alcock, R.A. Allsman, D. Alves, T.S. Axelrod, A.
Becker, D.P. Bennett, K.H. Cook, K.C. Freeman, K. Griest, J. Guern, M.
Lehner, S.L. Marshall, B.A. Peterson, P.J. Quinn, D. Reiss, A.W. Rodgers, C.
Stubbs, W. Sutherland and D. Welch (The MACHO Collaboration) |
astro-ph/9508050 | Effects of Sampling on Measuring Galaxy Count Probabilities | We investigate in detail the effects of sampling on our ability to accurately
reconstruct the distribution of galaxies from galaxy surveys. We use a simple
probability theory approach, Bayesian classifier theory and Bayesian transition
probabilities. We find the best Bayesian estimator for the case of low sampling
rate... | 1995-08-09 | 2009-10-28 | [
"astro-ph"
] | Istv\'an Szapudi and Alexander S. Szalay |
astro-ph/9508046 | Weak Interactions in Supernova Cores and Saturation of Nucleon Spin
Fluctuations | Extrapolation of perturbative nucleon spin fluctuation rates seems to suggest
a strong suppression of weak interactions in supernova cores. We derive a new
sum rule for the dynamical spin-density structure function which relates the
spin fluctuation rate to the average nuclear interaction energy. For a
bremsstrahlung l... | 1995-08-09 | 2008-11-26 | [
"astro-ph"
] | Guenter Sigl |
astro-ph/9508042 | The Deficit of Distant Galaxy Clusters in the RIXOS X-ray Survey | Clusters of galaxies are the largest gravitationally bound systems and
therefore provide an important way of studying the formation and evolution of
the large scale structure of the Universe. Cluster evolution can be inferred
from observations of the X-ray emission of the gas in distant clusters, but
interpreting these... | 1995-08-09 | 2007-05-23 | [
"astro-ph"
] | F.J. Castander, R.G. Bower, R.S. Ellis, A. Aragon-Salamanca, K.O.
Mason, G. Hasinger, R.G. McMahon, F.J. Carrera, J.P.D. Mittaz, I.
Perez-Fournon and H.J. Lehto |
astro-ph/9508047 | Cosmological Models of Gamma-Ray Bursts | We review models of cosmological gamma-ray bursts (GRBs). The statistical and
$\gamma$-ray transparency issues are summarized. Neutron-star and black-hole
merger scenarios are described and estimates of merger rates are summarized. We
review the simple fireball models for GRBs and the recent work on non-simple
fireball... | 1995-08-09 | 2009-10-28 | [
"astro-ph"
] | Charles D. Dermer (Naval Research Laboratory) and Thomas J. Weiler
(Vanderbilt University) |
astro-ph/9508040 | The first generation of stars: first steps towards chemical evolution of
galaxies | We argue that extreme metal-poor stars show a high dispersion in metallicity,
because their abundances are the outcome of very few supernova events.
Abundance anomalies should appear because of the discrete range of progenitor
masses. There is a natural metallicity threshold of $Z/Z_\odot\sim 10^{-4}$
below which one w... | 1995-08-09 | 2009-10-28 | [
"astro-ph"
] | Jean Audouze and Joseph Silk |
astro-ph/9508045 | Linear Potentials in the Cores of Clusters of Galaxies | We make a first application of the linear gravitational potentials of the
conformal gravity theory to the distance scale associated with clusters of
galaxies, with the theory being found to give a reasonable value for the mean
velocity of the virialized core of the typical Coma cluster, with no need to
invoke the exist... | 1995-08-09 | 2007-05-23 | [
"astro-ph"
] | Philip D. Mannheim (University of Connecticut) |
astro-ph/9508044 | The Morphological Evolution of Galaxies | I review the general progress made in the study of galaxy evolution
concentrating on the impact of systematic ground-based spectroscopic surveys of
faint galaxies and high resolution imaging with Hubble Space Telescope. The
picture emerging is one where massive regular galaxies have changed little
since redshift $z\sim... | 1995-08-09 | 2009-10-28 | [
"astro-ph"
] | R.S. Ellis |
astro-ph/9508051 | Statistics of Peculiar Velocities from Cosmic Strings | We calculate the probability distribution of a single component of peculiar
velocities due to cosmic strings, smoothed over regions with a radius of
several $h^{-1}$ Mpc. The probability distribution is shown to be Gaussian to
good accuracy, in agreement with the distribution of peculiar velocities
deduced from the 1.9... | 1995-08-09 | 2015-06-24 | [
"astro-ph"
] | R. Moessner (Brown University) |
astro-ph/9508035 | Dust distribution in disks supplied by small bodies: Is the Beta
Pictoris disk a gigantic multi-cometary tail? | We have evaluated the spatial distribution of dust in disks supplied by
colliding or evaporating bodies spread in a small belt. The gradient of the
distribution of dust expelled by radiation pressure is generally steeper than
the one observed around \bp. It follows that, to generate the \bp\ disk
distribution in such a... | 1995-08-08 | 2016-08-30 | [
"astro-ph"
] | A. Lecavelier des Etangs, A. Vidal-Madjar, R. Ferlet |
astro-ph/9508032 | Previrialization: Perturbative and N-Body Results | We present a series of N-body experiments which confirm the reality of the
previrialization effect. We also use weakly nonlinear perturbative approach to
study the phenomenon. These two approaches agree when the rms density contrast,
$\sigma$, is small; more surprisingly, they remain in agreement when $\sigma
\approx 1... | 1995-08-08 | 2009-10-28 | [
"astro-ph"
] | Ewa L. Lokas, Roman Juszkiewicz, Francois R. Bouchet and Eric Hivon |
astro-ph/9508034 | Boson Star Rotation: A Newtonian Approximation | Using the Newtonian approximation, we study rotating compact bosonic objects.
The equations which describe stationary states with non-zero angular momentum
are constructed and some numerical results are presented as examples. Limits on
the applicability of the Newtonian approximation are discussed. | 1995-08-08 | 2009-10-28 | [
"astro-ph",
"gr-qc"
] | Vanda Silveira and Claudio M. G. de Sousa (Universidade de Brasilia) |
astro-ph/9508038 | The Growth Rate of Tidally Excited Waves in Accretion Disks | Accretion disks in close binary systems are subject to a tidally driven
parametric instability which leads to the growth of internal waves near the
outer edges of such disks (Goodman 1993). These waves are important in
understanding the torque exerted on a disk by tidal forces and may play a role
in the structure of th... | 1995-08-08 | 2009-10-28 | [
"astro-ph"
] | Ethan T. Vishniac and Changsong Zhang (University of Texas) |
astro-ph/9508036 | The Linear-Size Evolution of Classical Double Radio Sources | Recent investigations of how the median size of extragalactic radio sources
change with redshift have produced inconsistent results. Eales compared the
radio and optical properties of a bright 3C and faint 6C sample and concluded
that $D\propto(1+z)^{-1.1\pm0.5}$ ($\Omega_0 = 0$), with $D$ being the median
size of the ... | 1995-08-08 | 2009-10-28 | [
"astro-ph"
] | Mark J. Neeser, Stephen A. Eales, J. Duncan Law-Green, Patrick Leahy,
and Steve Rawlings |
astro-ph/9508037 | Cosmological Origin for Cosmic Rays Above $10^{19}$ eV | The cosmic ray spectrum at $10^{19}{\rm eV}-10^{20}{\rm eV}$, reported by the
Fly's Eye and the AGASA experiments, is shown to be consistent with a
cosmological distribution of sources of protons, with a power law generation
spectrum ${\rm d}\ln N/{\rm d}\ln E=-2.3\pm0.5$ and energy production rate of
$4.5\pm1.5\times1... | 1995-08-08 | 2009-10-28 | [
"astro-ph"
] | Eli Waxman (Institute for Advanced Study, Princeton) |
astro-ph/9508033 | Buckling Bars and Boxy Bulges | It has been suggested that the peanut-shaped bulges seen in some edge-on disk
galaxies are produced when bars in these galaxies buckle. This paper reviews
the modelling which seeks to show how bars buckle, and I present a very simple
new model which captures the essential physics of this process. I then discuss
the pro... | 1995-08-08 | 2007-05-23 | [
"astro-ph"
] | Michael R. Merrifield (Southampton University) |
astro-ph/9508028 | Triggering of Imaging Air Cherenkov Telescopes: PMT trigger rates due to
night-sky photons | Imaging air Cherenkov telescopes are usually triggered on a coincidence of
two or sometimes more pixels, with discriminator thresholds in excess of 20
photoelectrons applied for each pixel. These thresholds required to suppress
night-sky background are significantly higher than expected on the basis of a
Poisson distri... | 1995-08-07 | 2008-02-03 | [
"astro-ph",
"hep-ex",
"nucl-ex"
] | G. Hermann, C. K\"ohler, T. Kutter, W. Hofmann (Max-Planck-Institut
f\"ur Kernphysik,Heidelberg,Germany) |
astro-ph/9508029 | Assessing Big-Bang Nucleosynthesis | Systematic uncertainties in the light-element abundances and their evolution
make a rigorous statistical assessment difficult. However, using Bayesian
methods we show that the following statement is robust: the predicted and
measured abundances are consistent with 95\% credibility only if the
baryon-to-photon ratio is ... | 1995-08-07 | 2009-10-28 | [
"astro-ph"
] | Craig J. Copi, David N. Schramm, and Michael S. Turner |
astro-ph/9508025 | The Structure of Cold Dark Matter Halos | We use N-body simulations to investigate the structure of dark halos in the
standard Cold Dark Matter cosmogony. Halos are excised from simulations of
cosmologically representative regions and are resimulated individually at high
resolution. We study objects with masses ranging from those of dwarf galaxy
halos to those... | 1995-08-07 | 2008-11-26 | [
"astro-ph"
] | Julio F. Navarro (Steward Observatory, University of Arizona), Carlos
S. Frenk (Physics Department, University of Durham), and Simon D.M. White
(MPI fur Astrophysik, Garching) |
astro-ph/9508031 | Accretion Flows Around Black Holes | Most accreting black holes emit a substantial fraction of their luminosity in
hard X-rays/soft $\gamma$-rays of up to $\sim{\rm few}\times100$ keV. The
observations suggest that the radiating gas is very hot, $T>10^9$ K, and
optically thin. Theoretical attempts to explain the observations are reviewed
and unresolved is... | 1995-08-07 | 2007-05-23 | [
"astro-ph"
] | Ramesh Narayan |
astro-ph/9508030 | The Kinematics of the Ionized and Molecular Hydrogen in the Starburst
Galaxy NGC 253 | Near-infrared H_2 1-0 S(1) and Br_gamma velocity curves along the major axis
of NGC 253 have revealed a central velocity gradient that is seven times
steeper than that shown by the optical velocity curve. This is interpreted as
an optical depth effect due to dust. Approximately 35 mag of visual extinction
in the center... | 1995-08-07 | 2009-10-28 | [
"astro-ph"
] | F. Prada, A. Manchado, B. Canzian, R. F. Peletier, C. D. McKeith and
J. E. Beckman |
astro-ph/9508026 | V/Vmax statistic and Neo-Classic Cosmological Tests | A new cosmological test is derived, based on the distribution of individual
V/Vmax in a complete redshift-limited sample of distant objects. The
fundamental assumption is that, in any bin of absolute luminosity, individual
V/Vmax are required to be uniformly spread over the [0,1] range. This condition
of uniformity all... | 1995-08-07 | 2007-05-23 | [
"astro-ph"
] | L. Van Waerbeke, G. Mathez, Y. Mellier, H. Bonnet and M. Lachieze-Rey |
astro-ph/9508024 | Elliptical Galaxies in Cluster Cores: Luminosity Functions and Selection
Procedures | We present here the results about the determination of the Luminosity
Function (LF) for elliptical galaxies in the core of fairly rich clusters as a
function of redshift and try to compare with the known LF of close, better
studied clusters of galaxies. We then outline the first use of a new method of
selecting member ... | 1995-08-07 | 2007-05-23 | [
"astro-ph"
] | Emilio Molinari |
astro-ph/9508027 | Pure Luminosity Evolution Hypothesis for QSOs: From Luminosity Functions
to Synthetic Catalogues | This paper describes the simulation of realistic Monte-Carlo extragalactic
catalogues, aimed at comparing the behaviour of cosmological tests versus input
parameters. QSO catalogues are built on a Luminosity Function derived from data
through suitable computation of individual maximum volumes in complete (but
magnitude... | 1995-08-07 | 2007-05-23 | [
"astro-ph"
] | G. Mathez, L. Van Waerbeke, Y. Mellier, H. Bonnet and M. Lachieze-Rey |
astro-ph/9508023 | QSOs and the hard x-ray background | We calculate the contribution to the cosmic x-ray background (CXB) of a
population of power law spectrum sources with spectral indices distributed over
a broad range of values. The composite spectrum of this source population is
significantly harder than that given by the power law having the average value
of spectral ... | 1995-08-06 | 2007-05-23 | [
"astro-ph"
] | Alexey Vikhlinin |
astro-ph/9508021 | Thermally-driven Neutron Star Glitches | We examine the thermal and dynamical response of a neutron star to a sudden
perturbation of the inner crust temperature. During the star's evolution,
starquakes and other processes may deposit $\gap 10^{42}$ ergs, causing
significant internal heating and increased frictional coupling between the
crust and the more rapi... | 1995-08-04 | 2009-10-28 | [
"astro-ph"
] | B. Link and R. I. Epstein |
astro-ph/9508022 | Resonance Oscillation Of Radiative Shock Waves In Accretion Disks Around
Compact Objects | We extend our previous numerical simulation of accretion disks with shock
waves when cooling effects are also included. We consider bremsstrahlung and
other power law processes: $\Lambda \propto T^{\alpha} \rho^2$ to mimic cooling
in our simulation. We employ {\it Smoothed Particle Hydrodynamics} technique as
in the pa... | 1995-08-04 | 2009-10-28 | [
"astro-ph"
] | Diego M. Molteni, H. Sponholz and Sandip K. Chakrabarti |
astro-ph/9508019 | Automated Source Classification using a Kohonen Network | We report progress in the development of automatic star/galaxy classifier for
processing images generated by large galaxy surveys like APM. Our
classification method is based on neural networks using the Kohonen
Self-Organizing Map approach. Our method is novel, since it does not need
supervised learning, i.e. human fa... | 1995-08-04 | 2009-10-28 | [
"astro-ph"
] | Petri Mahonen and Pasi Hakala (University of Oxford) |
astro-ph/9508020 | The Direct and Indirect Detection of Weakly Interacting Dark Matter
Particles | An ever-increasing body of evidence suggests that weakly interacting massive
particles (WIMPs) constitute the bulk of the matter in the Universe. We
illustrate how experimental data, dimensional analysis and Standard Model
particle physics are sufficient to evaluate and compare the potential of
detectors searching for ... | 1995-08-04 | 2007-05-23 | [
"astro-ph",
"hep-ph"
] | F. Halzen |
astro-ph/9508016 | Large Scale Structure Formation with Global Topological Defects. A new
Formalism and its implementation by numerical simulations | We investigate cosmological structure formation seeded by topological defects
which may form during a phase transition in the early universe. First we derive
a partially new, local and gauge invariant system of perturbation equations to
treat microwave background and dark matter fluctuations induced by topological
defe... | 1995-08-04 | 2009-10-28 | [
"astro-ph"
] | R. Durrer and Z.-H. Zhou |
astro-ph/9508015 | Radiation Dosimetry of Binary Pulsars | Companion stars exposed to high energy radiation from a primary neutron star
or accreting black hole can experience significant spallation of their heavy
elements, so that their atmospheres would be extremely rich in lithium,
beryllium, and especially boron. In this paper we note that the detection or
non-detection of ... | 1995-08-04 | 2009-10-28 | [
"astro-ph"
] | David Eichler and Biman B. Nath |
astro-ph/9508018 | A test for partial correlation with censored astronomical data | A new procedure is presented, which allows, based on Kendall's $\tau$, to
test for partial correlation in the presence of censored data. Further, a
significance level can be assigned to the partial correlation -- a problem
which hasn't been addressed in the past, even for uncensored data. The results
of various tests w... | 1995-08-04 | 2015-06-24 | [
"astro-ph"
] | M.G.Akritas and J.Siebert |
astro-ph/9508017 | An axially-symmetric Newtonian Boson Star | A new solution to the coupled gravitational and scalar field equations for a
condensed boson field is found in Newtonian approximation. The solution is
axially symmetric, but not spherically symmetric. For N particles the mass of
the object is given by $M = Nm - 0.02298 N^3 G_N^2 m^5$, to be compared with $M
= Nm - 0.0... | 1995-08-04 | 2009-10-28 | [
"astro-ph"
] | B. Schupp, J.J. van der Bij |
astro-ph/9508014 | A New Model for Black Hole Soft X-ray Transients in Quiescence | We present models of the soft X-ray transients, A0620-00, V404 Cyg, and X-ray
Nova Mus 1991, in quiescence. In each source, we postulate that there is an
outer region, extending outward from about 3000 Schwarzschild radii, where the
accretion flow is in the form of a standard thin disk. The outer disk produces
most of ... | 1995-08-03 | 2009-10-28 | [
"astro-ph"
] | Ramesh Narayan, Jeffrey E. McClintock, and Insu Yi |
astro-ph/9508012 | Neural computation as a tool for galaxy classification : methods and
examples | We apply and compare various Artificial Neural Network (ANN) and other
algorithms for automatic morphological classification of galaxies. The ANNs are
presented here mathematically, as non-linear extensions of conventional
statistical methods in Astronomy. The methods are illustrated using different
subsets Artificial ... | 1995-08-03 | 2015-06-24 | [
"astro-ph"
] | O. Lahav, A. Naim, L. Sodre, M.C. Storrie-Lombardi |
astro-ph/9508011 | Investigating the Near-Infrared Properties of Planetary Nebulae. I.
Narrowband Images | We present the results of a near-infrared narrowband imaging survey of
planetary nebulae. Objects were selected in a way that complements similar
surveys done at visible and near-infrared wavelengths. No new detections of
molecular hydrogen emission were made. The H2 is frequently found to be
extended, except in young,... | 1995-08-03 | 2009-10-28 | [
"astro-ph"
] | William B. Latter (NRAO/Tucson), Douglas M. Kelly (Univ. of Texas at
Austin), Joseph L. Hora (Institute for Astronomy), Lynne K. Deutsch (Univ. of
Massachusetts) |
astro-ph/9508013 | A 2nd generation cosmic axion experiment | An experiment is described to detect dark matter axions trapped in the halo
of our galaxy. Galactic axions are converted into microwave photons via the
Primakoff effect in a static background field provided by a superconducting
magnet. The photons are collected in a high Q microwave cavity and detected by
a low noise r... | 1995-08-03 | 2007-05-23 | [
"astro-ph"
] | C. Hagmann, W. Stoeffl, K. van Bibber, E. Daw, D. Kinion, L.
Rosenberg, P. Sikivie, N. Sullivan, D. Tanner, D. Moltz, F. Nezrick, M.
Turner, N. Golubev, L. Kravchuk |
astro-ph/9508010 | The Canada-France Redshift Survey X: The Quasar Sample | Six objects with broad emission lines and redshifts from 0.48 to 2.07 were
discovered among 736 extragalactic objects in the Canada-France Redshift Survey
(CFRS). Although the luminosities of half of the objects are such that they are
in the Seyfert regime (M_B > -23), all would be designated as quasars in
traditional ... | 1995-08-02 | 2015-06-24 | [
"astro-ph"
] | David Schade, David Crampton, F. Hammer, O. Le Fevre, S.J. Lilly |
astro-ph/9508009 | Cold Dark Matter Resuscitated? | The Cold Dark Matter (CDM) model has an elegant simplicitly which makes it
very predictive, but when its parameters are fixed at their `canonical' values
its predictions are in conflict with observational data. There is, however,
much leeway in the initial conditions within the CDM framework. We advocate a
re-examinati... | 1995-08-02 | 2016-06-08 | [
"astro-ph"
] | Martin White, Douglas Scott, Joe Silk, Marc Davis |
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