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/9502052 | Mixed dark matter with neutrino chemical potentials | Mixed dark matter models with one low-mass (e.g. 2.4eV) neutrino flavor are
shown to be in good agreement with observations if the neutrinos have non-zero
chemical potentials. This agreement holds (except for the problem with a
low-age Universe) even for high values of the Hubble-parameter. Massless
neutrinos with non-... | 1995-02-09 | 2010-01-15 | [
"astro-ph",
"hep-ph"
] | Georg B. Larsen and Jes Madsen |
astro-ph/9502053 | Interstellar Grains in Elliptical Galaxies: Grain Evolution | We consider the lifecycle of dust introduced into the hot interstellar medium
in isolated elliptical galaxies. Dust grains are ejected into galactic-scale
cooling flows in large ellipticals by normal mass loss from evolving red
giants. Newly introduced dust rapidly enters the hot gas environment and is
sputtered away b... | 1995-02-09 | 2016-08-30 | [
"astro-ph"
] | John C. Tsai (NASA Ames and CITA) and William G. Mathews (University
of California, Santa Cruz) |
astro-ph/9502050 | Stellar evolution with mass loss - comparison of numerical and
semi-analytical computations. | We present here results of stellar evolution calculations that include the
latest advances in radiative opacities and neutrino cooling, and discuss on the
basis of these models how the internal stellar structure responds to mass-loss
from the stellar surface. This problem has particular importance for the
development o... | 1995-02-09 | 2015-06-24 | [
"astro-ph"
] | R. Jimenez (Nordita), U.G. Jorgensen (NBI), P. Thejll (NBI) and J.
MacDonald (U. of Delaware). |
astro-ph/9502051 | Nearly Self-Consistent Disk-Bulge-Halo Models for Galaxies | We describe methods for setting up self-consistent disk-bulge-halo galaxy
models. The bulge and halo distribution functions (\df) are functions of $E$
and $L_z$ only. The halo's flattening and rotation can be specified. The disk
\df\ is a function of $E$ and $L_z$ and a third ``integral'', $E_z$, the
vertical energy, w... | 1995-02-09 | 2016-08-30 | [
"astro-ph"
] | Konrad Kuijken & John Dubinski |
astro-ph/9502049 | The Parker-Shearing instability in azimuthaly magnetized discs | We describe the effects of both magnetic buoyancy and differential rotation
on a disc of isothermal gas embedded in a purely azimuthal magnetic field, in
order to study the evolution and interplay of Parker and shearing
instabilities. Both instabilities occur on the slow MHD branch of the
dispersion relation, and can a... | 1995-02-08 | 2016-08-30 | [
"astro-ph"
] | Thierry Foglizzo and Michel Tagger |
astro-ph/9502047 | The Chemical Evolution of Damped Lyman Alpha Galaxies | Measurements of element abundances in damped Lyman alpha systems are
providing new means to investigate the chemical evolution of galaxies,
particularly at early times. We review progress in this area, concentrating on
recent efforts to extend the range of existing surveys to both higher and lower
redshifts. | 1995-02-08 | 2016-08-30 | [
"astro-ph"
] | M. Pettini (RGO), D.L. King (RGO), L.J. Smith (UCL) and R.W. Hunstead
(Sydney University) |
astro-ph/9502046 | A Speculation into the Origin of Neutral Globules In Planetary Nebulae:
Could the Helix's Comets Really Be Comets? | A novel explanation for the origin of the cometary globules within NGC 7293
(the "Helix" planetary nebula) is examined; that these globules originate as
massive cometary bodies at large astrocentric radii. The mass of such
hypothetical cometary bodies would have to be several orders of magnitude
larger than any such bo... | 1995-02-08 | 2021-10-13 | [
"astro-ph"
] | Grant Gussie (University of Tasmania) |
astro-ph/9502048 | Evidence for a Very Large-Scale Fractal Structure in the Universe from
Cobe Measurements | In this work, we analyse the temperature fluctuations of the cosmic microwave
background radiation observed by COBE and show that the distribution can be
fitted by a fractal distribution with a fractal dimension $ D= 1.43 \pm 0.07 $.
This value is in close agreement with the fractal dimension obtained by Coleman
and Pi... | 1995-02-08 | 2016-08-30 | [
"astro-ph"
] | E.M. de Gouveia Dal Pino, A. Hetem, J.E. Horvath, C.A.W. de Souza, T.
Villela and J.C.N. de Araujo |
astro-ph/9502039 | Globular Clusters with Tidal Tails: Deep Two-Color Star Counts | We examine the outer structure of 12 Galactic globular clusters using
star-count analyses. Deep, two-color, photographic photometry is used to select
and count stars with colors and magnitudes consistent with cluster-specific,
color-magnitude sequences. The resulting reduction in the number of
contaminating foreground ... | 1995-02-07 | 2014-10-13 | [
"astro-ph"
] | C.J. Grillmair, K.C. Freeman, M. Irwin, and P.J. Quinn |
astro-ph/9502041 | COSMOLOGICAL PARAMETERS AND GRAVITATIONAL LENSING STATISTICS | The general idea of determining cosmological parameters with gravitational
lensing statistics is outlined, and then recent work---with an emphasis on
applicability to all cosmological models, observational bias, better statistics
and robustness testing through numerical simulations---is discussed with
relevance to a sc... | 1995-02-07 | 2011-04-15 | [
"astro-ph"
] | Phillip Helbig |
astro-ph/9502044 | X-ray observations of the peculiar Be star LSI +61 303 | We present the results of a ROSAT Position Sensitive Proportional Counter
observation of the variable radio star \ls. The source has a power law spectrum
with photon index 1.1 +/- 0.3 and a luminosity of 5.9 x 10^{33} erg/s in the
0.1 -2.4 keV range. Variability on a timescale of days is clearly visible in
the ROSAT da... | 1995-02-07 | 2016-08-30 | [
"astro-ph"
] | P.Goldoni, S.Mereghetti |
astro-ph/9502042 | High Dynamic Range Imaging Using a Deformable Mirror for Space
Coronography | The need for high dynamic range imaging is crucial in many astronomical
fields, such as extra-solar planet direct detection, extra-galactic science and
circumstellar imaging. Using a high quality coronograph, dynamic ranges of up
to $10^{5}$ have been achieved. However the ultimate limitations of
coronographs do not co... | 1995-02-07 | 2016-08-30 | [
"astro-ph"
] | F. Malbet, J.W. Yu, and M. Shao |
astro-ph/9502043 | Multiwavelength Phenomenology of Isolated Neutron Stars | After reviewing the multifrequency behaviour of the Isolated Neutron Stars
detected so far, we analyze for each object the efficiency of conversion of the
star's rotational energy loss into optical, X and gamma radiation. Although the
number of pulsars detected at different wavelengths is rather limited, a
pattern is s... | 1995-02-07 | 2016-08-30 | [
"astro-ph"
] | P.Goldoni, C.Musso, P.A.Caraveo, G.F. Bignami |
astro-ph/9502036 | The Outer Regions of the Galactic Bulge:I Observations | An observational survey of stars selected from the region of sky in the
direction of the Galactic bulge is presented. We discuss the choice of tracer
populations for this study. Digitised UK Schmidt plate photometry, calibrated
with CCD photometry, is obtained in 18 regions over the bulge. Stars are
selected for spectr... | 1995-02-07 | 2015-06-24 | [
"astro-ph"
] | Rodrigo Ibata and Gerard Gilmore |
astro-ph/9502037 | The Outer Regions of the Galactic Bulge:II Analysis | We analyse velocity, chemical abundance and spatial distribution data for
some 1500 K- and M- giants in the Galactic Bulge. The bulge has a
well-determined linear rotation curve over the range $\rm 700pc \le R \le
3500pc$ with amplitude ${\rm \sim 25 km s^{-1} kpc^{-1}}$. The oblate isotropic
bulge model of Kent (1992)... | 1995-02-07 | 2015-06-24 | [
"astro-ph"
] | Rodrigo Ibata and Gerard Gilmore |
astro-ph/9502045 | IMAGING OF LOW REDSHIFT QSOs WITH WFPC2 | Observations with the PC2 CCD of the Hubble Space Telescope are described of
two bright QSOs of redshift ~0.3. 1403+434 is IR-bright and radio-quiet, and
2201+315 is radio-loud with extended structure. Exposures were taken with the
F702W and F555W filters. The images are deconvolved on their own and combined
with 0.5 a... | 1995-02-07 | 2016-08-30 | [
"astro-ph"
] | J.B. Hutchings and S.C. Morris |
astro-ph/9502038 | A Luminous Companion to SGR 1806-20 | We have obtained infrared spectra of the star suggested to be the counterpart
of the soft gamma-ray repeater (SGR) 1806-20. We found strong emission lines
similar to those seen in the spectra of the rare Luminous Blue Variables and
B[e] stars. A He I absorption line is also seen, from which we infer a spectral
type O9-... | 1995-02-07 | 2016-08-30 | [
"astro-ph"
] | M. H. van Kerkwijk, S. R. Kulkarni, K. Matthews, G. Neugebauer
(Palomar Observatory, Caltech) |
astro-ph/9502040 | Grand Unified Model of Accretion Disks Around Black Holes: the
Sub-Keplerian Paradigm | We show that viscous, transonic accretion disks which start with
sub-Keplerian angular momentum at the outer boundary reproduce the features of
the so-called thick, thin, slim and other accretion disk models depending upon
the accretion rates and viscosity parameters. These disks are advection
dominated in the pre-shoc... | 1995-02-06 | 2007-05-23 | [
"astro-ph"
] | Sandip K. Chakrabarti |
astro-ph/9502034 | COBE-DMR-normalised Open Inflation, CDM Cosmogony | Fourier analysis on a cut sky of the two-year COBE DMR 53 and 90 GHz sky maps
(in galactic coordinates) is used to determine the normalisation of an open
inflation model based on the cold dark matter scenario. The normalised model is
compared to measures of large-scale structure in the universe. Although the DMR
data a... | 1995-02-06 | 2010-12-09 | [
"astro-ph"
] | Krzysztof M. Gorski, Bharat Ratra, Naoshi Sugiyama and Anthony J.
Banday |
astro-ph/9502025 | Possible Connexion Between Large Scale Structures | From the Lyon-Meudon Extragalactic Database LEDA, we constructed a sample of
27,000 galaxies with radial velocities smaller than 15,000 km s$^{-1}$. From
this first sample we selected the 5,683 largest galaxies which constitute a
sample complete up to the diameter limit $D_{25}=1.6'$. This sub-sample has
been used to s... | 1995-02-06 | 2016-08-30 | [
"astro-ph"
] | Helene Di Nella and Georges Paturel (Observatoire de Lyon, France) |
astro-ph/9502031 | THE STRIKING NEAR-INFRARED MORPHOLOGY OF THE INNER REGION IN M100 | New optical and NIR K-band images of the inner 3 kpc region of the nearby
Virgo spiral M100 (NGC 4321) display remarkable morphological changes with
wavelength. While in the optical the light is dominated by a circumnuclear zone
of enhanced star formation, the features in the 2.2\mum image correspond to a
newly discove... | 1995-02-06 | 2009-10-28 | [
"astro-ph"
] | J. H. Knapen, J. E. Beckman, I. Shlosman, R. F. Peletier, C. H. Heller
and R. S. de Jong |
astro-ph/9502035 | COBE-DMR-normalisation for Cosmological Constant Dominated Cold Dark
Matter Models | The two-year COBE-DMR 53 and 90 GHz sky maps are used to determine the
normalization of inflationary, cosmological constant dominated, cold dark
matter models. Although the COBE-DMR data prefer a nearly critical value for
the total density, low-density models with Omega_0 > 0.15 can not be rejected
at a confidence leve... | 1995-02-06 | 2009-09-25 | [
"astro-ph"
] | Radoslaw Stompor, Krzysztof M. Gorski, and Anthony J. Banday |
astro-ph/9502030 | ESTIMATING MICROWAVE POWER SPECTRA | A new method for estimating the power spectrum $C_l$ from cosmic microwave
background (CMB) maps was recently presented by the author and applied to the 2
year COBE data. It was found that the spectral resolution $\Delta l$ for COBE
could be more than doubled at $l=15$, thereby revealing previously unresolved
features ... | 1995-02-06 | 2016-08-30 | [
"astro-ph"
] | Max Tegmark |
astro-ph/9502024 | Cosmology at the Crossroads | Observational tests during the next decade may determine if the evolution of
the Universe can be understood from fundamental physical principles, or if
special initial conditions, coincidences, and new, untestable physical laws
must be invoked. The inflationary model of the Universe is an important example
of a predict... | 1995-02-06 | 2016-08-30 | [
"astro-ph",
"gr-qc",
"hep-th"
] | Paul J. Steinhardt (University of Pennsylvania) |
astro-ph/9502032 | Collected Contributions from the COBE-DMR Group to the Maryland
Astrophysics Meeting on Dark Matter | The three papers summarize the methods employed by the COBE-DMR group to
analyze the power spectrum of the two-year DMR anisotropy maps. Results for the
slope and normalization of the power spectrum are presented and compared. The
implications of these results for various dark matter-based structure formation
models ar... | 1995-02-06 | 2007-05-23 | [
"astro-ph"
] | K. Gorski, C. L. Bennett, A. J. Banday, et al |
astro-ph/9502029 | THE X-RAY CLUSTER BARYON CRISIS | Nucleosynthesis in the standard hot big bang cosmology offers a successful
account of the production of the light nuclides during the early evolution of
the Universe. Consistency among the predicted and observed abundances of D,
$^3$He, \hel4 and \li7 leads to restrictive lower and upper bounds to the
present density o... | 1995-02-06 | 2016-08-30 | [
"astro-ph"
] | Gary Steigman and James.E. Felten |
astro-ph/9502027 | The Signature of Microlensing in QSO Variability-Redshift Correlations | A recently discovered inverse correlation between QSO redshift and long-term
continuum variability timescales was suggested to be the signature of
microlensing on cosmological scales (Hawkins 1993). A general theoretical
method for calculating such correlations is presented and applied to various
lensing scenarios in t... | 1995-02-06 | 2015-06-24 | [
"astro-ph"
] | Tal Alexander (Tel-Aviv University) |
astro-ph/9502033 | COBE-DMR-normalisation for Cold and Mixed Dark Matter Models
Inflationary Cosmogony | The two-year COBE-DMR 53 and 90 GHz sky maps in both ecliptic and galactic
coordinates, are used to determine the normalisation of inflationary, flat,
dark matter dominated universe models. The appropriately normalized cold and
mixed dark matter models, computed for a range of values of Omega_baryon and h,
and several ... | 1995-02-06 | 2009-09-25 | [
"astro-ph"
] | Krzysztof M. Gorski, Radoslaw Stompor, and Anthony J. Banday |
astro-ph/9502023 | The EDSGC - VII: The Edinburgh-Milano Cluster Redshift Survey | We present the redshifts of the galaxies and galaxy clusters which form the
Edinburgh--Milano (EM) cluster redshift survey. A total of 777 galaxy redshifts
have been measured in 94 clusters extracted from the digitised Edinburgh Durham
Cluster Catalogue. We also present the radial velocity dispersions for 37
clusters. ... | 1995-02-06 | 2016-08-30 | [
"astro-ph"
] | C.A. Collins, L. Guzzo, R.C. Nichol, S.L. Lumsden |
astro-ph/9502028 | THE MINIMUM MASS RATIO OF W URSAE MAJORIS BINARIES | The minimum mass ratio for tidal stability of a contact binary containing two
unevolved main-sequence stars is calculated to be $\qmin\simeq0.09$ in the case
of a mostly radiative primary, and is higher if an appreciable fraction of the
mass lies in a convective envelope. At least one observed system, AW UMa, has a
mas... | 1995-02-06 | 2016-08-30 | [
"astro-ph"
] | Frederic A. Rasio (IAS, Princeton) |
astro-ph/9502026 | Measurement of isotope shift in Eu II | The isotope shift between singly-charged ^<151>Eu and ^<153>Eu in the
4f^7(^8S^o)6s^9S_4-4f^7(^8S^o)6p_1/2>(J=4) transition at 4129 A has been
measured using fast ion beam-laser technique. This Eu line has attracted
interest in connection with efforts of obtaining a cosmochronometer based on
observed Th/Eu abundance ra... | 1995-02-06 | 2009-10-28 | [
"astro-ph"
] | Lars Brostrom, Sven Mannervik (Atomic Physics, Stockholm University),
Peder Royen (Phys Dept, Stockholm University) and Anders Wannstrom (Phys
Dept, Uppsala University) |
astro-ph/9502022 | Solar Structure in terms of Gauss' Hypergeometric Function | Hydrostatic equilibrium and energy conservation determine the conditions in
the gravitationally stabilized solar fusion reactor. We assume a matter density
distribution varying non- linearly through the central region of the Sun. The
analytic solutions of the differential equations of mass conservation,
hydrostatic equ... | 1995-02-05 | 2011-03-17 | [
"astro-ph"
] | H.J. Haubold and A.M. Mathai |
astro-ph/9502021 | Neutrino Emission from Dense Matter, and Neutron Star Thermal Evolution | A brief review is given of neutrino emission processes in dense matter, with
particular emphasis on recent developments. These include direct Urca processes
for nucleons and hyperons, which can give rise to rapid energy loss from the
stellar core without exotic matter, and the effect of band structure on
neutrino brems... | 1995-02-04 | 2016-08-30 | [
"astro-ph"
] | C. J. Pethick and Vesteinn Thorsson |
astro-ph/9502013 | Photoionization Effects During Galaxy Formation | SPH hydrodynamical simulations of the formation of galaxies are presented
including the effects of an UV background radiation field. Based on a talk
presented at the 17th Texas Symposium on Relativistic Astrophysics held in
Munich, December 1994. | 1995-02-03 | 2016-08-30 | [
"astro-ph"
] | Matthias Steinmetz |
astro-ph/9502015 | Unified Description of Accretion Flows Around Black Holes | We provide a unified description of thermal equilibria of black hole
accretion disks, including the newly-discovered advection-dominated solutions.
We classify the solutions on the basis of optical depth and importance of
advection cooling. We demonstrate that only four physically distinct
topological types of equilibr... | 1995-02-03 | 2009-10-28 | [
"astro-ph"
] | Xingming Chen, Marek A. Abramowicz, Jean-Pierre Lasota, Ramesh
Narayan, and Insu Yi |
astro-ph/9502018 | MASS SEGREGATION IN DARK MATTER MODELS. | We use the moments of counts of neighbors as given by the Generalized
Correlation Integrals, to study the clustering properties of Dark Matter Halos
(DH) in Cold Dark Matter (CDM) and Cold+Hot Dark Matter (CHDM) models. We
compare the results with those found in the CfA and SSRS galaxy catalogs. We
show that if we appl... | 1995-02-03 | 2016-08-30 | [
"astro-ph"
] | A. Campos, G. Yepes, A. Klypin, G. Murante, A. Provenzale and S.
Borgani |
astro-ph/9502020 | Derived Parameters for NGC 6791 from High-Metallicity Isochrones | We have computed 8, 10, and 12 Gyr isochrones and physically consistent
models of zero-age red horizontal branch stars for stellar masses between 0.55
and 1.3~\msun, all at [Fe/H] $=+0.15$. Comparison to the NGC 6791 BVI
photometry of Ka{\l}u\.zny & Udalski (1992) and Montgomery, Janes & Phelps
(1994) yields an age of ... | 1995-02-03 | 2009-10-28 | [
"astro-ph"
] | Michael J. Tripicco, Roger A. Bell (U. Maryland), Ben Dorman (U.
Virginia) & Beth Hufnagel (U. C. Santa Cruz/NRAO) |
astro-ph/9502019 | Mixed Cold-Hot Dark Matter Model with several Massive Neutrino Types | Mixed cold-hot dark matter cosmological models (CHDM) with $\Omega_{tot}=1$,
approximately flat initial spectrum of adiabatic perturbations and 1, 2 or 3
types of massive neutrinos are compared and tested using recent observational
data. The models with 2 or 3 neutrino types of equal mass permit as the best
fit larger ... | 1995-02-03 | 2009-09-25 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | Dmitri Pogosyan and Alexei Starobinsky |
astro-ph/9502014 | COLD ACCRETION DISKS WITH CORONAE AND ADVECTION | Cold optically thick accretion disks with hot coronae and radial advection
have been investigated. Within the framework of $\alpha$-viscosity models, we
assume that all the mass accretion and angular momentum transport take place in
the cold disk, but that a fraction of the gravitational energy released is
dissipated i... | 1995-02-03 | 2009-10-28 | [
"astro-ph"
] | Xingming Chen |
astro-ph/9502016 | THE ABELL CLUSTER INERTIAL FRAME | A re-analysis of Lauer \& Postman's (1994; LP) finding that the Abell cluster
inertial frame (ACIF), defined by the 119 Abell clusters within 15,000 km/s, is
moving at almost 700 km/s with respect to the cosmic microwave background. Such
a motion is inconsistent with most cosmological models at a confidence level of
95... | 1995-02-03 | 2016-08-30 | [
"astro-ph"
] | Matthew Colless |
astro-ph/9502006 | Warm absorbers in active galactic nuclei | Recent {\it ASCA} observations confirm the presence of X-ray absorption due
to partially ionized gas in many Seyfert 1 galaxies; the so-called warm
absorber. Constraints on the location of the warm material are presented with
the conclusion that this material lies at radii coincident with, or just
outside, the broad-li... | 1995-02-02 | 2015-06-24 | [
"astro-ph"
] | C.S. Reynolds and A.C. Fabian |
astro-ph/9502009 | Determination of Atmospheric Parameters of T Tauri Stars | The inferred effective temperatures (T$_{\rm eff}$) and surface gravities of
T Tauri stars (TTS) are usually contaminated by the presence of a non stellar
continuum emission (veiling) and the strong chromospheric activity
characteristic of these objects. In this work, we develop a method to determine
T$_{\rm eff}$'s an... | 1995-02-02 | 2016-08-30 | [
"astro-ph"
] | R. Piorno Schiavon, C. Batalha and B. Barbuy |
astro-ph/9502010 | Astrophysical and cosmological constraints on a scale-dependent
gravitational coupling | We study the phenomenological consequences of the recently proposed idea of a
running gravitational coupling on macroscopic scales. When applied to the
rotation curves of galaxies, we find that their flatness requires the presence
of baryonic dark matter. Bounds on the variation of the gravitational coupling
from primo... | 1995-02-02 | 2010-11-01 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | Orfeu Bertolami and Juan Garcia-Bellido |
astro-ph/9502005 | The Disruption of the Sagittarius Dwarf Galaxy. | Numerical simulations of dwarf spheroidal galaxies undergoing several close
encounters with the Milky Way are described. By comparing our models to
observed properties of the recently discovered dwarf galaxy in Sagittarius
(Sgr), we discuss implications of our results for the formation and evolution
of the Milky Way sy... | 1995-02-02 | 2016-08-30 | [
"astro-ph"
] | Kathryn V. Johnston, David N. Spergel, and Lars Hernquist |
astro-ph/9502008 | Large-scale Structure and the Determination of $H_{\rm o}$ from
Gravitational Lens Time Delays | We analyse the effects of large-scale inhomogeneities upon the observables of
a gravitational lens system, focusing on the issue of whether large-scale
structure imperils the program to determine the Hubble parameter through
measurements of time delays between multiple images in lens systems. We find
that the lens equa... | 1995-02-02 | 2016-08-30 | [
"astro-ph",
"gr-qc"
] | Gabriela C. Surpi, Diego D. Harari and Joshua A. Frieman |
astro-ph/9502007 | Intrinsic Interstellar Absorption in two Radio Galaxies at z=0.8 | We have found a strong absorption feature at 2598\AA~ in the spectra of two
distant radio galaxies, which we interpret as due to interstellar FeII. We
discuss this interpretation and the possibility of obtaining important
information on the evolution of the ISM in galaxies, to be compared with the
results of the study ... | 1995-02-02 | 2016-08-30 | [
"astro-ph"
] | S. di Serego Alighieri, A. Cimatti, S. Savaglio |
astro-ph/9502011 | CMB ANISOTROPIES: AN OVERVIEW | A brief outline of the current status of CMB anisotropies and what they might
mean, heavily biased towards the perspective of Berkeley theorists. Based on a
talk presented at the 17th Texas Symposium on Relativistic Astrophysics held in
Munich, December 1994. | 1995-02-02 | 2016-08-30 | [
"astro-ph"
] | Douglas Scott |
astro-ph/9502012 | A method for extracting maximum resolution power spectra from galaxy
surveys | The power spectrum estimated from a galaxy redshift survey is the real
spectrum convolved with a window function, so when estimating the power on very
large scales (for small k), it is important that this window function be as
narrow as possible. A method that achieves this is presented. The optimal
estimate of P(k) is... | 1995-02-02 | 2009-10-07 | [
"astro-ph"
] | Max Tegmark |
astro-ph/9502003 | Solar Neutrinos: Radiative Corrections in Neutrino-Electron Scattering
Experiments | Radiative corrections to the electron recoil-energy spectra and to total
cross sections are computed for neutrino-electron scattering by solar
neutrinos. Radiative corrections change monotonically the electron recoil
spectrum for incident \b8 neutrinos, with the relative probability of observing
recoil electrons being ... | 1995-02-01 | 2016-08-30 | [
"astro-ph",
"hep-ph",
"nucl-th"
] | John N. Bahcall, Marc Kamionkowski, and Alberto Sirlin |
astro-ph/9502004 | Spectra and Statistics of Cosmic String Perturbations on the Microwave
Background: A Monte Carlo Approach | Using Monte Carlo simulations of perturbations induced by cosmic strings on
the microwave background, we demonstrate the scale invariance of string
fluctuation patterns. By comparing string-induced fluctuation patterns with
gaussian random phase ones, we show that the non-gaussian signatures of the
string patterns are ... | 1995-02-01 | 2009-10-28 | [
"astro-ph"
] | Andrea M. Gilbert, Leandros Perivolaropoulos |
astro-ph/9502002 | Quantifying the Morphologies and Dynamical Evolution of Galaxy Clusters.
I. The Method | We describe and test a method to quantitatively classify clusters of galaxies
according to their projected morphologies. This method will be subsequently
used to place constraints on cosmological parameters ($\Omega$ and the power
spectrum of primordial fluctuations on scales at or slightly smaller than that
of cluster... | 1995-02-01 | 2009-10-28 | [
"astro-ph"
] | David A. Buote (MIT) and John C. Tsai (CITA) |
astro-ph/9502001 | The Distribution Of Cosmological $\gamma$-ray Bursts | We compare the burst distribution of the new (2B) BATSE catalogue to a
cosmological distribution. The observed distribution agrees well with a
cosmological one, however, it is insensitive to cosmological parameters such as
$\O$ and $\Lambda$. The bursts are not necessarily standard candles and their
luminosity can vary... | 1995-02-01 | 2009-10-28 | [
"astro-ph"
] | Ehud Cohen and Tsvi Piran |
astro-ph/9501113 | THE GRISHCHUK-ZELDOVICH EFFECT IN THE OPEN UNIVERSE | When considering perturbations in an open universe, cosmologists retain only
sub-curvature modes (defined as eigenfunctions of the Laplacian whose
eigenvalue is less than $-1$ in units of the curvature scale, in contrast with
the super-curvature modes whose eigenvalue is between $-1$ and $0$).
Mathematicians have known... | 1995-01-31 | 2010-04-29 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | David H. Lyth |
astro-ph/9501108 | THE UNUSUAL X-RAY AND OPTICAL PROPERTIES OF THE ULTRASOFT AGN ZWICKY
159.034 (RE J 1237+264) | Zwicky 159.034, one of the Seyfert galaxies identified with EUV sources
detected during the ROSAT Wide Field Camera (WFC) all-sky survey, has unusual
properties. The ROSAT Position Sensitive Proportional Counter (PSPC) 0.1--2.5
keV X-ray spectrum, obtained simultaneously with the WFC survey, appears
extremely steep. Su... | 1995-01-31 | 2016-06-08 | [
"astro-ph"
] | W.N. Brandt, K.A. Pounds, H. Fink |
astro-ph/9501115 | Variance, Skewness & Kurtosis: results from the APM Cluster Redshift
Survey and model predictions | We estimate the variance $\xibar_2$, the skewness $\xibar_3$ and the kurtosis
$\xibar_4$ in the distribution of density fluctuations in a complete sample
from the APM Cluster Redshift Survey with 339 clusters and a mean depth $ \sim
250\Mpc$. We are able to measure the statistics of fluctuations in spheres of
radius $R... | 1995-01-31 | 2015-06-24 | [
"astro-ph"
] | Enrique Gazta\~naga, Rupert Croft and Gavin Dalton |
astro-ph/9501107 | The NOT GL survey for multiply imaged quasars | A gravitational lens (GL)-search program, initiated in 1990 at the Nordic
Optical Telescope (NOT), has revealed several possible GL-candidates among a
sample of 168 quasars (QSOs), chosen from three lists compiled by C. Hazard, D.
Reimers and J. Surdej, respectively. Some of these candidates, selected for
having close ... | 1995-01-31 | 2016-08-30 | [
"astro-ph"
] | A.O. Jaunsen, M. Jablonski, B.R. Pettersen and R. Stabell |
astro-ph/9501116 | Simple Analytical Methods for Computing the Gravity-Wave Contribution to
the Cosmic Background Radiation Anisotropy | We present two simple analytical methods for computing the gravity wave
contribution to the cosmic background radiation (CBR) anisotropy in
inflationary models; one method uses a time-dependent transfer function, the
other method uses an approximate gravity-wave mode function which is a simple
combination of the lowest... | 1995-01-31 | 2009-10-28 | [
"astro-ph",
"hep-ph"
] | Yun Wang (Fermilab) |
astro-ph/9501110 | The CO Tully-Fisher Relation for the Virgo Cluster, | A comparison between the CO and HI Tully-Fisher relation for a sample of 30
Virgo ga\-la\-xies shows no significant difference concerning the intrinsic
scatter. The distance moduli from both relations after correcting for the
sample incompleteness bias agree within the errors and also show no significant
difference wit... | 1995-01-31 | 2016-08-30 | [
"astro-ph"
] | F. Schoeniger, Y. Sofue, |
astro-ph/9501109 | Large Angle CMB Anisotropy in an Open Universe in the One-Bubble
Inflationary Scenario | We consider an alternative scenario of inflation which can account for a
spatially open universe. It is similar to the old inflation in which the bubble
nucleation occurs in the sea of false vacuum, but differs from it in that the
second slow rollover inflation occurs inside a nucleated bubble. Hence our
observable uni... | 1995-01-31 | 2016-08-30 | [
"astro-ph",
"gr-qc"
] | Kazuhiro Yamamoto, Misao Sasaki and Takahiro Tanaka |
astro-ph/9501111 | COLLISIONAL VERSUS COLLISIONLESS MATTER: A ONE-DIMENSIONAL ANALYSIS OF
GRAVITATIONAL CLUSTERING | We present the results of a series of one-dimensional N-body and
hydrodynamical simulations which have been used for testing the different
clustering properties of baryonic and dark matter in an expanding background.
Initial Gaussian random density perturbations with a power-law spectrum $P(k)
\propto k^n$ are assumed.... | 1995-01-31 | 2015-06-24 | [
"astro-ph"
] | Claudio Gheller, Lauro Moscardini and Ornella Pantano |
astro-ph/9501112 | MEASURING SPIRAL ARM TORQUES: RESULTS FOR M100 | Spiral arms, if they are massive, exert gravitational torques that transport
angular momentum radially within galactic disks. These torques depend not on
the pattern speed or permanence of the arms but only on the nonaxisymmetric
mass distribution. Hence the torques can be measured from photometry. We
demonstrate this ... | 1995-01-31 | 2016-08-30 | [
"astro-ph"
] | Oleg Y. Gnedin, Jeremy Goodman, and Zsolt Frei (Princeton University
Observatory) |
astro-ph/9501114 | ESTABLISHING THE CONNECTION BETWEEN PEANUT-SHAPED BULGES AND GALACTIC
BARS | It has been suggested that the peanut-shaped bulges seen in some edge-on disk
galaxies are due to the presence of a central bar. Although bars cannot be
detected photometrically in edge-on galaxies, we show that barred potentials
produce a strong kinematic signature in the form of double-peaked line-of-sight
velocity d... | 1995-01-31 | 2016-08-30 | [
"astro-ph"
] | Konrad Kuijken & Michael R. Merrifield |
astro-ph/9501106 | STELLAR POPULATION GRADIENTS IN BRIGHT CLUSTER GALAXIES AT z=0.2 | Slit spectra, covering the rest frame near-ultraviolet and blue wavelength
regions, are combined with moderately deep g and R images to investigate radial
population gradients in the brightest components of six z=0.2 galaxy clusters
selected by x-ray brightness. We conclude that the brightest cluster galaxies
(BCGs) of... | 1995-01-30 | 2016-08-30 | [
"astro-ph"
] | T.J. Davidge and M. Grinder |
astro-ph/9501105 | Element Abundances at High Redshifts: The N/O Ratio at Low Metallicity | Our knowledge of galactic chemical evolution is currently limited to
observations of Milky Way stars and H II regions of nearby galaxies. Damped
Lyman~$\alpha$ systems offer a new approach for tracking the evolution of
normal galaxies from early epochs to the present day. Here we report the first
measurements of nitrog... | 1995-01-30 | 2007-05-23 | [
"astro-ph"
] | K Lipman (IoA, Cambridge), M Pettini (RGO, Cambridge), R Hunstead
(Sydney) |
astro-ph/9501103 | An Analytic Colar Model: Physical Principles and Mathematical Structure | Physical principles and mathematical structure involved in deriving an
analytical representation of the internal structure of the Sun is discussed.
For a two-parameter family of a non-linear matter density distribution, the run
of mass, pressure, temperature, and luminosity throughout the Sun is presented
in terms of G... | 1995-01-30 | 2011-03-02 | [
"astro-ph"
] | Hans J. Haubold |
astro-ph/9501104 | Search for Intra-Cluster Machos by Pixel Lensing of M87 | Intra-Cluster Machos (ICMs) are a plausible candidate for at least some of
the dark matter in clusters of galaxies. ICMs can be detected by searching
toward M87 for ``pixel lensing'', gravitational microlensing of unresolved
stars. Dedicated observations by the Wide Field and Planetary Camera on the
{\it Hubble Space T... | 1995-01-29 | 2009-10-28 | [
"astro-ph"
] | Andrew Gould |
astro-ph/9501100 | Skewness of Cosmic Microwave Background Temperature Fluctuations Due to
Non-linear Gravitational Instability | Skewness of temperature fluctuations of the cosmic microwave background (CMB)
produced by initially Gaussian adiabatic perturbations with the flat
(Harrison-Zeldovich) spectrum, which arises due to non-linear corrections to a
gravitational potential at the matter-dominated stage, is calculated
quantitatively. For the s... | 1995-01-28 | 2009-10-28 | [
"astro-ph"
] | Dipak Munshi, Tarun Souradeep and Alexei A. Starobinsky |
astro-ph/9501097 | The Discovery of Two Giant Arcs in the Rich Cluster A2219 with the Keck
Telescope | We report the discovery with the Keck telescope of two new multiply-imaged
arcs in the luminous X-ray cluster A2219 ($z=0.225$). The brighter arc in the
field is red and we use spectroscopic and photometric information to identify
it as a $z \sim 1$ moderately star-forming system. The brightness of this arc
implies tha... | 1995-01-27 | 2015-06-24 | [
"astro-ph"
] | Ian Smail, David W. Hogg, Roger Blandford, Judith G. Cohen, Alastair
C. Edge, and S. George Djorgovski |
astro-ph/9501098 | EXOSAT OBSERVATIONS OF THE ULTRA-SOFT X-RAY BINARY 4U1957+11 | We present results from the analysis of the two EXOSAT observations of the
low mass X-ray binary (LMXRB) 4U1957+11. The 1-20keV spectrum of the source is
best fitted by a power law model with exponential cutoff, that provides an
approximation of a thermal Comptonisation spectrum. The cutoff energy (~2keV),
as well as t... | 1995-01-27 | 2007-05-23 | [
"astro-ph"
] | D. Ricci, G. L. Israel, and L. Stella |
astro-ph/9501101 | Big Bad Nucleosynthesis: A Review | Big Bang Nucleosynthesis represents perhaps the first, and still perhaps the
most powerful particle-astrophysics connection. As such, it should provide an
example for other work in this area. I discuss the current status of standard
model BBN predictions and constraints, and then argue that the issue of
observational s... | 1995-01-27 | 2008-11-26 | [
"astro-ph",
"hep-ph"
] | Lawrence M. Krauss (Case Western Reserve University) |
astro-ph/9501099 | Soft X-ray Emission from the Spiral Galaxy NGC 1313 | The nearby barred spiral galaxy NGC 1313 has been observed with the PSPC
instr- ument on board the ROSAT X-ray satellite. Ten individual sources are
found. Three sources (X-1, X-2 and X-3 [SN~1978K]) are very bright (~10^40
erg/s) and are unusual in that analogous objects do not exist in our Galaxy. We
present an X-ray... | 1995-01-27 | 2016-08-30 | [
"astro-ph"
] | E. J. M. Colbert, R. Petre, E. M. Schlegel and S. D. Ryder |
astro-ph/9501102 | The Tully-Fisher relation for low surface brightness galaxies -
implications for galaxy evolution | We present the B band Tully-Fisher relation for Low Surface Brightness (LSB)
galaxies. These LSB galaxies follow the same Tully-Fisher relation as normal
spiral galaxies. This implies that the mass-to-light ratio (M/L) of LSB
galaxies is typically a factor of 2 larger than that of normal galaxies of the
same total lumi... | 1995-01-26 | 2016-06-08 | [
"astro-ph"
] | M.A. Zwaan, J.M. van der Hulst, W.J.G. de Blok, & S.S. McGaugh |
astro-ph/9501094 | Electron Energy Losses Near Pulsar polar Caps | We present results of a model for the energetics of electrons accelerated by
the large electric fields generated by a rotating highly magnetized neutron
star. The energy loss mechanisms we consider in our calculations include
magnetic Compton scattering of thermal x-ray photons, triplet pair production,
and curvature r... | 1995-01-26 | 2009-10-28 | [
"astro-ph"
] | Steven J. Sturner (Naval Research Laboratory/NRC) |
astro-ph/9501095 | X-ray emission from the PSR B1259--63 system near apastron | The PSR B1259--63 system contains a 47 ms radio pulsar in a highly eccentric
binary with a Be-star companion. Strongly time variable X-ray emission was
reported from this system as the pulsar was near apastron in 1992-early 1993.
The variability was primarily deduced from an apparent non-detection of the
\psr system du... | 1995-01-26 | 2016-08-30 | [
"astro-ph"
] | J. Greiner, M. Tavani, T. Belloni |
astro-ph/9501096 | DEEP IR IMAGING OF GLOBULAR CLUSTERS. III. M13 | We have used the CFHT REDEYE infrared camera to obtain deep J and K' images
of four fields in the globular cluster M13. The composite K, J-K
color-magnitude diagram (CMD) extends from the upper red giant branch (RGB) to
2 magnitudes below the main sequence turn-off (MSTO). Selected [Fe/H]~ -1.6
isochrones from Bergbusc... | 1995-01-26 | 2016-08-30 | [
"astro-ph"
] | T. J. Davidge and W. E. Harris |
astro-ph/9501091 | EXPERIMENTAL LIMITS ON THE DARK MATTER HALO OF THE GALAXY FROM
GRAVITATIONAL MICROLENSING. | We have monitored 8.6 million stars in the Large Magellanic Cloud for 1.1
years and have found 3 events consistent with gravitational microlensing. We
place strong constraints on the Galactic halo content in the form of compact
lensing objects in the mass range $10^{-4} \msun$ to $10^{-1} \msun$. Three
events is fewer ... | 1995-01-25 | 2016-08-30 | [
"astro-ph",
"hep-ph"
] | C. Alcock, R.A. Allsman, T.S. Axelrod, D.P. Bennett, K.H. Cook, K.C.
Freeman, K. Griest, J.A. Guern, M.J. Lehner, S.L. Marshall, H.-S. Park, S.
Perlmutter, B.A. Peterson, M.R. Pratt, P.J. Quinn, A.W. Rodgers, C.W. Stubbs,
W. Sutherland (The MACHO Collaboration). |
astro-ph/9501092 | Clustering of the Lyman Alpha Clouds in the Line of Sight to the Z=3.66
QSO 0055-269 | The spectrum of the Q0055-269 ($z=3.66$) has been observed at the resolution
of 14 km s$^{-1}$ in the wavelength interval 4750--6300 \AA. The statistical
distribution of the Doppler parameter for the Ly$_\alpha$ lines is peaked at
$b\simeq 23$ km s$^{-1}$. The column density distribution is described by a
power-law wit... | 1995-01-25 | 2007-05-23 | [
"astro-ph"
] | S. Cristiani, S. D'Odorico, A. Fontana, E. Giallongo, S. Savaglio |
astro-ph/9501093 | The Inverse Compton Thermostat in Hot Plasmas Near Accreting Black Holes | The hard X-ray spectra of accreting black holes systems are generally
well-fit by thermal Comptonization models with temperatures $\sim 100$ keV. We
demonstrate why, over many orders of magnitude in heating rate and seed photon
supply, hot plasmas radiate primarily by inverse Compton scattering, and find
equilibrium te... | 1995-01-24 | 2009-10-28 | [
"astro-ph"
] | Paola Pietrini (Arcetri Observatory), Julian H. Krolik (Johns Hopkins
University) |
astro-ph/9501087 | SPECTRA OF YOUNG GALAXIES | Invited review, Ringberg conference on "Galaxies in the Young Universe"
(Sept94) | 1995-01-24 | 2015-06-24 | [
"astro-ph"
] | Stephane Charlot |
astro-ph/9501089 | Observable Properties of X-ray Heated Winds in AGN: Warm Reflectors and
Warm Absorbers | When an AGN is obscured, the warm reflecting gas nearby can be seen by a
combination of bremsstrahlung, intrinsic line emission, and reflection of the
nuclear continuum, both by electron scattering and by resonance line
scattering. Resonance lines, due both to intrinsic emission and scattering, are
particularly promine... | 1995-01-24 | 2009-10-28 | [
"astro-ph"
] | Julian H. Krolik and Gerard A. Kriss |
astro-ph/9501090 | Excitation of Activity in Galaxies by Minor Mergers | Mergers between gas--rich disks and less--massive dwarf galaxies are studied
using numerical simulation. As the orbit of a satellite decays through
dynamical friction, the primary disk develops large-amplitude spirals in
response to its tidal forcing. While these features arise in both the stars and
the gas in the disk... | 1995-01-24 | 2016-08-30 | [
"astro-ph"
] | Lars Hernquist and Chris Mihos (UC Santa Cruz) |
astro-ph/9501088 | A Calculation of Cosmic Variance in Cosmic Microwave Background
Anisotropy | We present a theoretical calculation of the variance $\Delta C_l$ of the CMB
anisotropy power spectrum $\langle C_l\rangle$ caused by gravitational waves
based on quantum field theory in an inflationary cosmology. | 1995-01-24 | 2008-02-03 | [
"astro-ph",
"hep-ph"
] | Kin-Wang Ng and A. D. Speliotopoulos |
astro-ph/9501084 | The environment of HII galaxies | Recent morphological studies (Telles \& Terlevich 1994) of HII galaxies, i.e.
dwarf galaxies dominated by a very luminous starburst, have indicated that
luminous HII galaxies tend to show distorted morphology suggestive of tidal
interactions triggering the present starburst while low luminosity HII galaxies
tend to be ... | 1995-01-23 | 2015-06-24 | [
"astro-ph"
] | Eduardo Telles and Roberto Terlevich |
astro-ph/9501081 | COSMIC RAYS FROM ACCRETING ISOLATED NEUTRON STARS | Interstellar matter that is accreted onto isolated magnetic neutron stars in
the Galaxy ($\sim 10^9$ by number) is accelerated and reflected back by MHD
shocks, which envelope the stars. The integrated power in the Galaxy
$L_{cr,ns}$ is $ \sgreat 10^{40} {\rm erg \ s^{-1} }$, the energy distribution
is a power law of s... | 1995-01-23 | 2015-06-24 | [
"astro-ph"
] | Amotz Shemi |
astro-ph/9501082 | Star Formation Studies at the VLT | We present an overview of what can be done in the field of star formation
using the VLT and its advanced instrumentation, and especially with the very
high angular resolution provided by the VLT in the VLTI mode. Herbig-Haro
objects and early stellar evolution, pre-main sequence binaries, circumstellar
disks and surfac... | 1995-01-23 | 2016-08-30 | [
"astro-ph"
] | Claude Bertout, Bo Reipurth, Fabien Malbet |
astro-ph/9501083 | Particle acceleration and entropy considerations | Possible entropy constraints on particle acceleration spectra are discussed.
Solar flare models invoke a variety of initial distributions of the primary
energy release over the particles of the flare plasma -- ie., the partition of
the energy between thermal and nonthermal components. It is suggested that,
while this p... | 1995-01-23 | 2011-05-23 | [
"astro-ph"
] | John C Brown, Gregory Beekman, Norman Gray, Alexander L MacKinnon
(University of Glasgow) |
astro-ph/9501085 | The Morphology of Low Surface Brightness Disk Galaxies | We present $UBVI$ and H$\alpha$ images of a sample of Low Surface Brightness
(LSB) disk galaxies. These galaxies are generally late types, if they can be
sensibly classified at all. However, they are not dwarfs, being intrinsically
large and luminous.
The morphology of LSB galaxies is discussed in terms of the physic... | 1995-01-23 | 2016-08-30 | [
"astro-ph"
] | Stacy McGaugh, Jim Schombert, & Greg Bothun |
astro-ph/9501086 | Generalised Scalar Field Potentials and Inflation | We investigate the range of inflationary universe models driven by scalar
fields possessing a general interaction potential of the form $V(\phi) = V_0
\phi^n \exp(-\lambda \phi^m)$. Power-law, de Sitter and intermediate
inflationary universes emerge as special cases together with several new
varieties of inflation. Ana... | 1995-01-23 | 2016-08-30 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | Paul Parsons and John D. Barrow |
astro-ph/9501079 | ORIGIN OF THE HIGH ENERGY EXTRAGALACTIC DIFFUSE GAMMA RAY BACKGROUND | We show that cosmic rays in external galaxies, groups and clusters rich in
gas, with an average flux similar to that observed in the Milky Way, could have
produced the observed extragalactic diffuse gamma radiation. | 1995-01-22 | 2016-08-30 | [
"astro-ph"
] | Arnon Dar and Nir J. Shaviv |
astro-ph/9501080 | STABILITY IN THE WEAK VARIATIONAL PRINCIPLE OF BAROTROPIC FLOWS | I find conditions under which the "Weak Energy Principle" of Katz, Inagaki
and Yahalom (1993) gives necessary and sufficient conditions. My conclusion is
that, necessary and sufficient conditions of stability are obtained when we
have only two mode coupling in the gyroscopic terms of the perturbed
Lagrangian. To illust... | 1995-01-22 | 2016-08-30 | [
"astro-ph"
] | Asher Yahalom |
astro-ph/9501078 | Potential of Interplanetary Torques and Solar Modulation for Triggering
Terrestrial Atmospheric and Lithospheric Events | The Sun is forced into an orbit around the barycenter of the solar system
because of the changing mass distribution of the planets. Solar-planetary-lunar
dynamic relationships may form a new basis for understanding and predicting
cyclic solar forcing functions on the Earth's climate. | 1995-01-22 | 2011-03-17 | [
"astro-ph"
] | R.W. Fairbridge, G. Windelius, H.J. Haubold |
astro-ph/9501075 | Field Distortions in the CPC2 Plate Data | Residuals of a conventional plate adjustment of 5,687 plates of the Second
Cape Photographic Catalogue (CPC2) using the Southern Reference Star (SRS)
Catalog were analyzed to search for systematic errors depending on the location
of the star images on the plate. Even after correcting for third order optical
distortion,... | 1995-01-20 | 2016-08-30 | [
"astro-ph"
] | N. Zacharias |
astro-ph/9501077 | Observing molecular hydrogen clouds and dark massive objects in galactic
halos | Molecular hydrogen clouds can contribute substantially to the galactic halo<
dark matter and may lead to the birth of massive halo objects (MHOs) observed
indirectly by microlensing. We present a method to detect these molecular
clouds in the halo of M31 using the Doppler shift effect. We also consider the
possibility ... | 1995-01-20 | 2011-05-23 | [
"astro-ph"
] | F. De Paolis, G. Ingrosso, Ph. Jetzer, A. Quadir, and M. Roncadelli |
astro-ph/9501076 | Weakly Nonlinear Evolution of Topology of Large-scale Structure | The gravitational evolution of the genus and other statistics of isodensity
contours of the density field is derived analytically in a weakly nonlinear
regime using second-order perturbation theory. The effect of final smoothing in
perturbation theory on the statistics of isodensity contours is also evaluated.
The resu... | 1995-01-20 | 2016-08-30 | [
"astro-ph"
] | Takahiko Matsubara |
astro-ph/9501070 | H_0 and Odds on Cosmology | Recent observations by the Hubble Space Telescope of Cepheids in the Virgo
cluster imply a Hubble Constant $H_0=80\pm17$\ km/sec/Mpc. We attempt to
clarify some issues of interpretation of these results for determining the
global cosmological parameters $\Omega$ and $\Lambda$. Using the formalism of
Bayesian model comp... | 1995-01-19 | 2016-08-30 | [
"astro-ph"
] | A. H. Jaffe |
astro-ph/9501067 | CONSTRAINTS ON THE OPACITY OF SPIRAL DISKS FROM NEAR-INFRARED
OBSERVATIONS | In this paper I review how near-infrared (NIR) observations can constrain the
opacity of spiral disks. Basic considerations show that NIR photometry provides
a powerful probe of the optical depths in spiral galaxy disks in the regime of
interest, where the optical depth in the V-band is near unity. I review the
existin... | 1995-01-19 | 2016-08-30 | [
"astro-ph"
] | Hans-Walter Rix, Max-Planck- Inst. fuer Astrophysik |
astro-ph/9501072 | On the age vs depth and optical clarity of deep ice at South Pole | The first four strings of phototubes for the AMANDA high-energy neutrino
observatory are now frozen in place at a depth of 800 to 1000 m in ice at the
South Pole. During the 1995-96 season an additional six strings will be
deployed at greater depths. Provided absorption, scattering, and refraction of
visible light are ... | 1995-01-19 | 2012-08-27 | [
"astro-ph"
] | The AMANDA collaboration |
astro-ph/9501071 | NEUTRON STARS: PROBES FOR HIGH DENSITY BARYON PAIRING | We consider, in general terms, the early thermal evolution of an isolated
neutron star, i.e., during the first $10^5$ years after the supernova explosion
when the cooling is driven by neutrino emission from the core. It is shown
that, if fast neutrino emission is occuring, the surface temperature is
actually determined... | 1995-01-19 | 2011-04-15 | [
"astro-ph",
"nucl-th"
] | Dany PAGE (Instituto de Astronomia, UNAM, Mexico) |
astro-ph/9501066 | Effects of the Running Gravitational Constant on the Amount of Dark
Matter | The amount of dark matter in the Milky Way and beyond is examined by taking
into account the possible running of the gravitational constant $G$ as a
function of distance scale. If the running of $G$, as suggested by the
Asymptotically-Free Higher-Derivative quantum gravity, is incorporated into the
calculation of the t... | 1995-01-19 | 2010-11-30 | [
"astro-ph",
"hep-ph"
] | A. Bottino, C. W. Kim and J. Song |
astro-ph/9501074 | OMEGA AND BIASING FROM OPTICAL GALAXIES VERSUS POTENT MASS | The mass density field in the local universe, recovered by the POTENT method
from peculiar velocities of $\sim$3000 galaxies, is compared with the density
field of optically-selected galaxies. Both density fields are smoothed with a
Gaussian filter of radius 12 $h^{-1}$ Mpc. Under the assumptions of
gravitational insta... | 1995-01-19 | 2015-06-24 | [
"astro-ph"
] | M. J. Hudson, A. Dekel, S. Courteau, S. M. Faber, J. A. Willick |
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