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/9501068 | THE SHAPES OF DARK HALOS | The shapes of dark halos (e.g. spherical, oblate or triaxial) provide
important clues to the formation history of the halos, to their baryon content
and to the nature of the dark matter. The halo shapes also influence the
dynamics of the galaxy they harbor. This review discusses the current status of
theoretical predic... | 1995-01-19 | 2016-08-30 | [
"astro-ph"
] | Hans-Walter Rix, Max-Planck- Inst. fuer Astrophysik |
astro-ph/9501073 | Kinetics of Conversion of Air Bubbles to Air-Hydrate Crystals in
Antarctic Ice | The depth-dependence of bubble concentration at pressures above the
transition to the air hydrate phase and the optical scattering length due to
bubbles in deep ice at the South Pole are modeled using diffusion-growth data
from the laboratory, taking into account the dependence of age and temperature
on depth in the ic... | 1995-01-19 | 2010-11-01 | [
"astro-ph"
] | P. B. Price (Department of Physics, University of California,
Berkeley) |
astro-ph/9501069 | NEW INSIGHTS INTO NON-RADIATIVE HEATING IN LATE-A STAR CHROMOSPHERES | Using new and archival spectra from the Goddard High Resolution Spectrograph,
we have searched for evidence of chromospheric and transition region emission
in six stars of mid- to late-A spectral type. Two of the stars, alpha Aql (A7
IV-V) and alpha Cep (A7 IV-V), show emission in the C~II 1335 A doublet,
confirming th... | 1995-01-19 | 2016-08-30 | [
"astro-ph"
] | Frederick M. Walter, Lynn D. Matthews, and Jeffrey L. Linsky |
astro-ph/9501064 | High Energy Neutrinos from Quasars | We review and clarify the assumptions of our basic model for neutrino
production in the cores of quasars, as well as those modifications to the model
subsequently made by other workers. We also present a revised estimate of the
neutrino background flux and spectrum obtained using more recent empirical
studies of quasar... | 1995-01-18 | 2011-04-15 | [
"astro-ph",
"hep-ph"
] | F.W.Stecker and M.H.Salamon |
astro-ph/9501065 | Absorption of High Energy Gamma-Rays by Low Energy Intergalactic Photons | Following our previously proposed technique, we have used the recent
gamma-ray observations of Mrk 421 to place theoretically significant
constraints on and possible estimates of the intergalactic infrared radiation
field (IIRF) which are consistent with normal galactic IR production by stars
and dust and rule out exot... | 1995-01-18 | 2011-04-15 | [
"astro-ph",
"hep-ph"
] | F. W. Stecker and O. C. De Jager |
astro-ph/9501062 | The DENIS 2 Micron Survey and its Cosmological Applications | Near-infrared surveys have very promising cosmological applications. The
DENIS 2 micron survey, currently in camera-testing, is scheduled to begin in
early 1995, and to map the entire southern sky in the $I$, $J$, and $K'$ bands.
The steps for the near-homogeneous extraction of $\sim 10^5$ galaxies are
outlined, some p... | 1995-01-18 | 2016-08-30 | [
"astro-ph"
] | Gary A. Mamon (IAP) |
astro-ph/9501063 | The Detection of DENIS Galaxies | Using simulated images, we test various methods, for the homogeneous
detection of objects in DENIS images. The optimal detection limits depend on
the object type and the sky background, but little on the PSF or the smoothing
filter used to increase the signal-to-noise of the images. | 1995-01-18 | 2016-08-30 | [
"astro-ph"
] | Vincent Banchet, Gary A. Mamon & Matthieu Contensou |
astro-ph/9501056 | Diagrammatic Methods in Statistics and Biasing in the Large-scale
Structure of the Universe | We develop technique concerning statistical analyses of the large-scale
structure of the universe in the presence of biasing in the structure
formation. We formulate the diagrammatic method to calculate the correlation
functions of the nonlocally biased field from a generally non-Gaussian density
field. Our method is b... | 1995-01-17 | 2016-08-30 | [
"astro-ph"
] | Takahiko Matsubara |
astro-ph/9501054 | Velocity profiles of Osipkov-Merritt models | A simple algorithm is presented for the calculation of the projected
line-of-sight velocity profiles (VPs) of non-rotating anisotropic spherical
stellar dynamical models with a phase-space distribution function of the
Osipkov-Merritt type. The velocity distribution in these models is isotropic
inside the anisotropy rad... | 1995-01-17 | 2015-06-24 | [
"astro-ph"
] | C.M. Carollo, P.T. de Zeeuw, R.P. van der Marel |
astro-ph/9501061 | Physics and Chemistry of Purcell's Alignment | Paramagnetic alignment of suprathermally rotating grains is discussed in view
of recent progress in understanding subtle processes taking place over grain
surface. It is shown that in typical ISM conditions, grains with surfaces of
amorphous H$_{2}$O ice, defected silicate or polymeric carbonaceous material
are likely ... | 1995-01-17 | 2015-06-24 | [
"astro-ph"
] | Alex Lazarian |
astro-ph/9501055 | Statistics of Isodensity Contours in Redshift Space | The peculiar velocities of galaxies distort the clustering pattern
anisotropically in redshift space. This effect on the statistics of isodensity
contours is examined by linear theory. The statistics considered in this paper
are the three- and two-dimensional genus of isodensity contours, the area of
isodensity contour... | 1995-01-17 | 2016-08-30 | [
"astro-ph"
] | Takahiko Matsubara |
astro-ph/9501058 | ROTATION, DIFFUSION, AND OVERSHOOT IN THE SUN: EFFECTS ON THE
OSCILLATION FREQUENCIES AND THE NEUTRINO FLUX | We have studied the importance of the combined effects of rotation,
diffusion, and convective overshoot on the p-mode oscillation spectrum and the
neutrino flux of the standard solar model. To isolate the various physical
affects included in the new rotation plus diffusion models we also constructed
solar models to tes... | 1995-01-17 | 2016-08-30 | [
"astro-ph"
] | Brian Chaboyer, P. Demarque, D.B.Guenther & M.H. Pinsonneault |
astro-ph/9501060 | An Independent Calibration of Stellar Ages: HST Observations of White
Dwarfs at V=25 | The white dwarf luminosity function of a stellar cluster will have a sharp
truncation at a luminosity which is determined by the time since formation of
the first white dwarfs in that cluster. Calculation of the dependence of this
limiting luminosity on age requires relatively well-understood physics and is
independent... | 1995-01-17 | 2016-06-08 | [
"astro-ph"
] | Ted von Hippel, Gerard Gilmore, D.H.P. Jones |
astro-ph/9501059 | The Imprint of Proper Motion of Nonlinear Structures on the Cosmic
Microwave Background | We investigate the imprint of nonlinear matter condensations on the Cosmic
Microwave Background (CMB) in an $\Omega=1$, Cold Dark Matter (CDM) model
universe. Temperature anisotropies are obtained by numerically evolving matter
inhomogeneities and CMB photons from the beginning of decoupling until the
present epoch. Th... | 1995-01-17 | 2016-08-30 | [
"astro-ph"
] | Robin Tuluie and Pablo Laguna (Penn State) |
astro-ph/9501057 | Variable polarisation and luminosity for microlensing of extended
stellar sources | Microlensing of extended stellar sources in the LMC and Galaxy by low mass
lenses can produce variable polarisation. The characteristics of the
polarisation and flux profiles can provide considerable information about the
lens geometry, and help determine the importance of such low mass objects as a
dark matter compone... | 1995-01-17 | 2015-06-24 | [
"astro-ph"
] | J.F.L. Simmons, A.M. Newsam and J.P. Willis |
astro-ph/9501053 | Diffusive Shock Acceleration Simulations: Comparison with Particle
Methods and Bow Shock Measurements | Direct comparisons of diffusive particle acceleration numerical simulations
have been made against Monte Carlo and hybrid plasma simulations by Ellison
{\it et. al.} (1993) and against observations at the earth's bow shock
presented by Ellison {\it et. al.} (1990). Toward this end we have introduced a
new numerical sch... | 1995-01-16 | 2016-08-30 | [
"astro-ph"
] | Hyesung Kang (Pusan N.U.) and T. W. Jones (U. of Minnesota) |
astro-ph/9501050 | DID PLANET FORMATION BEGIN INSIDE PERSISTENT GASEOUS VORTICES? | We explore here the idea, reminiscent in some respect of Von Weizsacker's
(1944) and Alfven's (1976) outmoded cosmogonies, that long-lived vortices in a
turbulent protoplanetary nebula can capture large amount of solid particles and
initiate the formation of planets. Some puzzling features of the solar system
appear as... | 1995-01-16 | 2007-05-23 | [
"astro-ph"
] | P. Barge and J. Sommeria |
astro-ph/9501049 | Visual phenomenon for distribution of the nearest light stars like
possible evidence of existence thin stars structure | It's well known that there are structure of the distribution of the nearest
light stars (Herschel(1847) and Guld(1879)). Some visual phenomena which
connected with numbering by brightness give possible evidence of the existence
more thin structure. | 1995-01-16 | 2009-04-16 | [
"astro-ph"
] | Rashid Faizullin |
astro-ph/9501052 | BATSE Gamma-Ray Burst Line Search: III. Line Detectability | We evaluate the ability of the BATSE spectroscopy detectors to detect the
absorption lines observed by Ginga in gamma ray burst spectra. We find that
BATSE can detect the 20.6 keV line in the S1 segment of GB870303 with a
detection probability of ~1/4 in nearly normally incident bursts, with the
probability dropping of... | 1995-01-16 | 2016-08-30 | [
"astro-ph"
] | D. L. Band, L. A. Ford, J. L. Matteson (UCSD), M. S. Briggs, W. S.
Paciesas, G. N. Pendleton, R. D. Preece (UAH), D. M. Palmer, B. J. Teegarden,
B. E. Schaefer (MSFC) |
astro-ph/9501051 | EVOLUTION OF FAINT IRAS GALAXIES | There has been some disagreement about the strength of evolution exhibited by
IRAS galaxies. With a parameterisation such that the co-moving density
increases as $(1+z)^P$ measurements of $P$ range from $2\pm3$ to $6.7\pm2.3$.
We have recently completed a deep IRAS redshift survey which should help to
clarify the situa... | 1995-01-16 | 2008-02-03 | [
"astro-ph"
] | Seb Oliver (Imperial College) et al. |
astro-ph/9501048 | Energy Principles for Self-Gravitating Barotropic Flows: I. General
Theory | The following principle of minimum energy may be a powerful substitute to the
dynamical perturbation method, when the latter is hard to apply. Fluid elements
of self-gravitating barotropic flows, whose vortex lines extend to the boundary
of the fluid, are labelled in such a way that any change of trial
configurations a... | 1995-01-15 | 2007-05-23 | [
"astro-ph"
] | Joseph Katz, Shogo Inagaki and Asher Yahalom |
astro-ph/9501047 | The Evolution of Correlation Functions and Power Spectra in
Gravitational Clustering | Hamilton et al. (1991) proposed a simple formula relating the nonlinear
autocorrelation function of the mass distribution to the primordial spectrum of
density fluctuations for gravitational clustering in an $\Omega=1$ universe.
High resolution N-body simulations show this formula to work well for
scale-free spectra $P... | 1995-01-14 | 2016-06-08 | [
"astro-ph"
] | B. Jain, H.J. Mo and S.D.M. White |
astro-ph/9501042 | DETECTORS FOR THE COSMIC AXIONIC WIND | We propose experimental schemes for detection an axionic condensate supposed
to be cosmic dark matter. Various procedures are considered in dependence on
the value of the axion mass.
There are well known indications that a large part of the Universe mass
exists in a form of dark matter: The analysis of rotation curve... | 1995-01-13 | 2007-05-23 | [
"astro-ph",
"hep-ph"
] | Peter Vorob'ev and Igor' Kolokolov |
astro-ph/9501045 | Cosmic Microwave Background Polarization | Polarization of the cosmic microwave background, though not yet detected,
provides a source of information about cosmological parameters complementary to
temperature fluctuations. This paper provides a complete theoretical treatment
of polarization fluctuations. After a discussion of the physics of
polarization, the Bo... | 1995-01-13 | 2014-10-13 | [
"astro-ph"
] | Arthur Kosowsky (Harvard) |
astro-ph/9501043 | SUB--DEGREE ANISOTROPY OBSERVATIONS: GROUND--BASED, BALLOON--BORNE AND
SPACE EXPERIMENTS | Extensive, accurate imaging of the Cosmic Background Radiation temperature
anisotropy at sub--degree angular resolution is widely recognized as one of the
most crucial goals for cosmology and astroparticle physics in the next decade.
We review the scientific case for such measurements in relation with sky
coverage, att... | 1995-01-13 | 2016-08-30 | [
"astro-ph"
] | L. Danese, L. Toffolatti, A. Franceschini, M. Bersanelli & N.
Mandolesi |
astro-ph/9501044 | LARGE SCALE PERTURBATIONS IN THE OPEN UNIVERSE | When considering perturbations in an open (Omega<1) 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 k... | 1995-01-13 | 2016-08-30 | [
"astro-ph",
"gr-qc",
"hep-ph"
] | David H Lyth (Lancaster) and Andrzei Woszczyna (Krakow) |
astro-ph/9501041 | Counts-in-cells analysis of the statistical distribution in an N-body
simulated universe | Evolution of the statistical distribution of density field is investigated by
means of a counts-in-cells method in a low-density cold-dark-matter simulated
universe. Four theoretical distributions, i.e. the negative binomial
distribution, the lognormal distribution, the Edgeworth series and the skewed
lognormal distrib... | 1995-01-13 | 2015-06-24 | [
"astro-ph"
] | Haruhiko Ueda and Jun'ichi Yokoyama (YITP Kyoto University) |
astro-ph/9501046 | Dark matter in elliptical galaxies | We present measurements of the shape of the stellar line-of-sight velocity
distribution out to two effective radii along the major axes of the four
elliptical galaxies NGC 2434, 2663, 3706, and 5018. The velocity dispersion
profiles are flat or decline gently with radius. We compare the data to the
predictions of f=f(E... | 1995-01-13 | 2016-08-30 | [
"astro-ph"
] | M. Carollo, T. de Zeeuw, R. van der Marel, J. Danziger, E. Qian |
astro-ph/9501039 | Vortices In Circumstellar Disks | We discuss the physics of vortices in the circumstellar disks associated with
young stellar objects. We elucidate the basic physical properties of these
localized storm systems. In particular, we consider point vortices, linear
vortices, the effects of self-gravity, magnetic fields, and nonlinear aspects
of the problem... | 1995-01-12 | 2016-08-30 | [
"astro-ph"
] | Fred Adams and Richard Watkins |
astro-ph/9501040 | Nucleosynthesis Constraints on Defect-Mediated Electroweak Baryogenesis | In the defect-mediated electroweak baryogenesis scenario, baryons are
produced in well separated regions of space. It is shown that between the
electroweak phase transition at a temperature of $T \sim 100 {\rm GeV}$ and the
end of nucleosynthesis at $T \sim 1 {\rm KeV}$ the baryon inhomogeneities
dissipate, and that no... | 1995-01-12 | 2010-11-01 | [
"astro-ph",
"hep-ph"
] | Robert Brandenberger (Brown Univ.), Anne-Christine Davis (DAMTP, Univ.
of Cambridge) and Martin J. Rees (Inst. of Astronomy, Univ. of Cambridge) |
astro-ph/9501038 | THE VELOCITY OF THE EMITTING PLASMA OF THE SUPERLUMINAL GALACTIC SOURCE
GRS 1915+105 | We calculate the flux and size ratio of radio emitting features moving in
antiparallel directions at relativistic speeds, taking into account that the
pattern we observe may move at a velocity different from the one of the
emitting plasma. Both velocities can be determined in sources in which both the
approaching and t... | 1995-01-12 | 2016-08-30 | [
"astro-ph"
] | Gianluigi Bodo and Gabriele Ghisellini (Osservatorio Astronomico di
Torino, Italy) |
astro-ph/9501033 | THERMAL RADIATION FROM MAGNETIZED NEUTRON STARS: A look at the Surface
of a Neutron Star. | Surface thermal emission has been detected by ROSAT from four nearby young
neutron stars. Assuming black body emission, the significant pulsations of the
observed light curves can be interpreted as due to large surface temperature
differences produced by the effect of the crustal magnetic field on the flow of
heat from... | 1995-01-11 | 2016-08-30 | [
"astro-ph"
] | Dany Page |
astro-ph/9501037 | On the Origin of the Clustered QSO Metal Absorption Lines | Observations show that there is significant clustering of QSO metal
absorption lines within the range of velocity dispersion between 200km/sec and
600 km/sec. With a reasonable supernova rate, it is shown that high velocity
gases driven by SNe and/or strong stellar winds could explain the clustered
absorptions, provide... | 1995-01-11 | 2016-08-30 | [
"astro-ph"
] | Xiangdong Shi |
astro-ph/9501036 | The light curve and the time delay of QSO 0957+561 | We present a new analysis of the presently available photometric data for the
gravitationally lensed quasar 0957+561 A,B with the aim of determining the time
delay between its two images. The basic method used is the dispersion
estimation technique. Even by using the simplest non-parametric form of our
method we can co... | 1995-01-11 | 2016-08-30 | [
"astro-ph"
] | Jaan Pelt, Rainer Kayser, Sjur Refsdal, Thomas Schramm |
astro-ph/9501035 | A MODEL FOR THE RADIO EMISSION FROM SNR 1987A | The observations of radio emission from SNR~1987A can be accounted for on the
basis of diffusive shock acceleration of electrons by the supernova blast wave.
However, with this interpretation the observed spectral index implies that the
compression ratio of the gas subshock is roughly $2.7$ rather than the value of
$4$... | 1995-01-11 | 2016-08-30 | [
"astro-ph"
] | P. Duffy, Lewis Ball, J.G. Kirk |
astro-ph/9501034 | COBE Constraints on Baryon Isocurvature Models | We consider Bayesian constraints on standard isocurvature baryon models from
the slope and normalization of the anisotropy power spectrum detected by the
COBE DMR experiment in their two year maps. In conjunction with either the
amplitude of matter fluctuations $\sigma_8$ {\it or} its slope, all open models
are ruled o... | 1995-01-10 | 2016-08-30 | [
"astro-ph"
] | Wayne Hu, Emory F. Bunn, and Naoshi Sugiyama |
astro-ph/9501027 | Effects of Starbursts on the Structure of Young Galaxies | We have investigated the effects of primeval starbursts on the galactic
structure, showing that the dynamical structure of young galaxies is changed by
relaxation of a stellar system formed by a starburst-driven outflowing gas
(superwind). When a superwind interacts with halo gas, an expanding dense
supershell of shock... | 1995-01-10 | 2016-08-30 | [
"astro-ph"
] | Keiichi Wada, Asao Habe, and Yoshiaki Sofue |
astro-ph/9501029 | A Dust Lane in the Radio galaxy 3C270 | We present broad band surface photometry of the radio galaxy 3C270
(NGC~4261). We find a distinct dust lane in the $V-R$ image of the galaxy, and
determine its orientation and size. We use the major axis profile of the galaxy
to estimate the optical depth of the dust lane, and discuss the significance of
the lane to th... | 1995-01-10 | 2009-10-28 | [
"astro-ph"
] | Ashish Mahabal, Ajit Kembhavi (IUCAA); K. P. Singh, P. N. Bhat (TIFR);
T. P. Prabhu (IIA) |
astro-ph/9501030 | SUPERNOVA BLASTWAVES AND PRE-SUPERNOVA WINDS: THEIR COSMIC RAY
CONTRIBUTION | Supernova explosions into predecessor stellar winds can lead to particle
acceleration, which we suggest can explain most of the observed cosmic rays of
the nuclei of Helium and heavier elements, from GeV in particle energies up to
near $3 \, 10^9$ GeV, as well as electrons above about 30 GeV. We go through
the followin... | 1995-01-10 | 2016-08-30 | [
"astro-ph"
] | Peter L. Biermann |
astro-ph/9501028 | Reconstructing Positions and Peculiar Velocities of Galaxy Clusters
within 20000 km/sec. I: The Cluster 3D Dipole | Starting from the observed distribution of galaxy clusters in redshift space
we use a two--step procedure to recover their distances and peculiar
velocities. After statistically correcting for the unobserved cluster
distribution in the zone of avoidance ($|b|\le 20^{\circ}$) and also for a
smooth absorption at higher $... | 1995-01-10 | 2016-08-30 | [
"astro-ph"
] | E.Branchini and M.Plionis |
astro-ph/9501032 | TURBULENCE IN MOLECULAR CLOUDS | We generate random Gaussian turbulent velocity fields with a Kolmogorov
spectrum and use these to obtain synthetic line-of-sight velocity profiles. The
profiles are found to be similar to line profiles observed in molecular clouds.
We suggest methods for analysing measured line profiles to test whether they
might arise... | 1995-01-10 | 2016-08-30 | [
"astro-ph"
] | John Dubinski, Ramesh Narayan, and T.G. Phillips |
astro-ph/9501031 | The Mass Distribution of the Lens Galaxy in MG1131+0456 | We present the results of modeling 5, 8 and 15 GHz maps of the gravitational
lens MG1131+0456 using the LensClean algorithm. Two models for the mass
distribution in the lens were fit: a de Vaucouleurs model and a model with the
two-dimensional potential phi = b^{2-alpha}(r^2+s^2)^{alpha/2}/2alpha, both in
an external s... | 1995-01-10 | 2016-08-30 | [
"astro-ph"
] | G. H. Chen (Massachusetts Institute of Technology), C. S. Kochanek
(Harvard-Smithsonian Center for Astrophysics and Department of Astronomy), J.
N. Hewitt (Massachusetts Institute of Technology) |
astro-ph/9501022 | THE OPTICAL GRAVITATIONAL LENSING EXPERIMENT. THE CATALOG OF PERIODIC
VARIABLE STARS IN THE GALACTIC BULGE. I. PERIODIC VARIABLES IN THE CENTER OF
THE BAADE'S WINDOW. | This paper is the first part of the Catalog of Periodic Variable Stars in the
Galactic bulge. The Catalog is based on observations collected during the OGLE
microlensing search. 213 periodic variable stars brighter than I=18 mag: 31
pulsating, 116 eclipsing and 66 miscellaneous type variables from the Baade's
Window BW... | 1995-01-09 | 2016-08-30 | [
"astro-ph"
] | A. UDALSKI, M. KUBIAK, M. SZYMANSKI, J. KALUZNY, M. MATEO and W.
KRZEMINSKI |
astro-ph/9501021 | Dust as the cause of spots on Jupiter | The long-lived spots caused by the impact of fragments of Comet S-L 9 on
Jupiter can be understood if clouds of dust are produced by the impact. These
clouds reside in the stratosphere, where they absorb visible light that would
ordinarily reflect from the cloud deck below, and reflect radiation at infrared
wavelengths... | 1995-01-09 | 2016-08-30 | [
"astro-ph"
] | G.B. Field G. P. Tozzi and R. M. Stanga |
astro-ph/9501025 | INDICATIONS OF DARK MATTER DERIVED FROM LARGE SCALE FLOWS | Recent progress in the measurement of relative distances to galaxies has been
quite substantial, and catalogs of 3000 galaxies with distances are soon to
become available. The peculiar {\it velocity} field (deviations from Hubble
flow) derivable from these catalogs, when compared to the peculiar {\it
gravity} field der... | 1995-01-09 | 2016-08-30 | [
"astro-ph"
] | Marc Davis and Adi Nusser |
astro-ph/9501024 | Thermally Induced Density Perturbations in the Inflation Era | The possibility of thermally induced initial density perturbations in
inflationary cosmology is examined. The fluctuation dynamics of a scalar field
plus thermal bath system during slow roll is described by a Langevin-like
equation. Fluctuation-dissipation arguments show that for a wide parameter
range within the stand... | 1995-01-09 | 2016-08-30 | [
"astro-ph",
"hep-ph",
"hep-th"
] | Arjun Berera (Dept of Physics, Pennsylvania State Univ) and Li-Zhi
Fang |
astro-ph/9501026 | On Near-Infrared H-Alpha Searches for High-Redshift Galaxies | The lack of success of Lyman-alpha searches for high-redshift (z>2) field
galaxies may be due to extinction by dust, suggesting that surveys based on
lines of longer wavelength, particularly H-alpha, may be more effective. To
test the dust hypothesis we have undertaken deep broad- (K') and narrow-band
(5000 km/s, 2.177... | 1995-01-09 | 2015-06-24 | [
"astro-ph"
] | A.J. Bunker, S.J. Warren, P.C. Hewett and D.L. Clements |
astro-ph/9501020 | A CO(3-2) Survey of Nearby Mira Variables | A survey of CO(3-2) emission from optically visible oxygen-rich Mira variable
stars within 500 pc of the sun was conducted. A molecular envelope was detected
surrounding 36 of the 66 stars examined. Some of these stars have lower outflow
velocities than any Miras previously detected in CO. The average terminal
velocity... | 1995-01-09 | 2009-10-28 | [
"astro-ph"
] | K. Young (Caltech Submillimeter Observatory) |
astro-ph/9501023 | The Tinsley Diagram Revisited | Motivated by the recent determinations of the Hubble constant $(H_0)$ from
observations of Cepheid variables in NGC4571 and M100, we plot the Tinsley
diagram with level curves of the cosmological constant $(\Lambda)$. Based on
current estimates of the absolute ages of globular clusters we conclude that
$\Lambda > 0$ an... | 1995-01-09 | 2016-08-30 | [
"astro-ph"
] | Stephen Leonard and Kayll Lake (Queen's University, Kingston, Ontario) |
astro-ph/9501019 | Terrestrial Implications of Cosmological Gamma-Ray Burst Models | The observation by the BATSE instrument on the Compton Gamma Ray Observatory
that gamma-ray bursts (GRBs) are distributed isotropically around the Earth but
nonuniformly in distance has led to the widespread conclusion that GRBs are
most likely to be at cosmological distances, making them the most luminous
sources know... | 1995-01-08 | 2016-08-30 | [
"astro-ph"
] | S. E. Thorsett (Princeton U.) |
astro-ph/9501018 | HST Images of Nearby Luminous Quasars II: Results for Eight Quasars and
Tests of the Detection Sensitivity | HST observations of eight intrinsically luminous quasars with redshifts
between $0.16$ and~$0.29$ are presented. Seven companion galaxies brighter than
$M_V = -16.5$ lie within a projected distance of 25 kpc of the quasars; three
of the companions are located closer than $3''$ (6 kpc projected distance) from
the quasar... | 1995-01-06 | 2016-08-30 | [
"astro-ph"
] | John N. Bahcall, Sofia Kirhakos and Donald P. Schneider |
astro-ph/9501017 | A Parallel Self--Consistent Field Code | We describe a version of an algorithm for evolving self-gravitating
collections of particles that should be nearly ideal for parallel
architectures. Our method is derived from the ``self-consistent field'' (SCF)
approach suggested previously by Clutton-Brock and others. Owing to the use of
a global description of the g... | 1995-01-06 | 2016-08-30 | [
"astro-ph"
] | Lars Hernquist, Steinn Sigurdsson and Greg L. Bryan |
astro-ph/9501015 | Structure on large scale in the Universe up to the distance of 200 Mpc | The distribution of galaxies up to a distance of 200 Mpc (650 million
light-years) is flat and shows a structure like a shell roughly centered on the
Local Supercluster (Virgo cluster). This result clearly confirms the existence
of the hypergalactic large scale structure noted in 1988. This is presently the
largest str... | 1995-01-06 | 2016-08-30 | [
"astro-ph"
] | DI NELLA Helene and PATUREL Georges, Observatoire de Lyon (France) |
astro-ph/9501016 | LIMITS ON ANISOTROPY AND INHOMOGENEITY FROM THE COSMIC BACKGROUND
RADIATION, | We consider directly the equations by which matter imposes anisotropies on
freely propagating background radiation, leading to a new way of using
anisotropy measurements to limit the deviations of the Universe from a
Friedmann-Robertson-Walker (FRW) geometry. This approach is complementary to
the usual Sachs-Wolfe appr... | 1995-01-06 | 2016-08-30 | [
"astro-ph"
] | Roy Maartens, George F. R. Ellis and William R. Stoeger, |
astro-ph/9501014 | CO, HI and cold dust in a sample of IRAS galaxies | Using IRAM 30m, SEST 15m, and Nancay radiotelescopes, we have gathered the
1mm continuum emission, spectra of the J=1--0 CO line and of the HI line at
21cm for two samples of IRAS galaxies. Using these data, we have estimated the
HI masses, the H$_2$ masses and the dust masses. We find that for far-infrared
selected ga... | 1995-01-05 | 2016-08-30 | [
"astro-ph"
] | Paola Andreani, Fabienne Casoli and Maryvonne Gerin |
astro-ph/9501012 | COBE CONSTRAINTS ON KALUZA-KLEIN COSMOLOGIES | A class of Kaluza-Klein cosmologies recently proposed is compared with
observations of the cosmic microwave background. Some models are ruled out,
while others turn out to be viable, with the number of extra dimensions being
constrained by the COBE and Tenerife experiments. | 1995-01-05 | 2014-10-13 | [
"astro-ph"
] | V. Faraoni, F.I. Cooperstock and J.M. Overduin |
astro-ph/9501013 | Cosmological parameters and the redshift distribution of gravitational
lenses | For known gravitational lens systems the redshift distribution of the lenses
is compared with theoretical expectations for $10^{4}$~Friedmann-Lema\^\i
tre~cosmological models, which more than cover the range of possible cases. The
comparison is used for assigning a relative probability to each of the models.
The entire... | 1995-01-05 | 2011-05-23 | [
"astro-ph"
] | Phillip Helbig and Rainer Kayser (Hamburg Observatory) |
astro-ph/9501010 | Time Dependent Clustering Analysis of the Second BATSE Gamma-Ray Burst
Catalog | A time dependent two-point correlation-function analysis of the BATSE 2B
catalog finds no evidence of burst repetition. As part of this analysis, we
discuss the effects of sky exposure on the observability of burst repetition
and present the equation describing the signature of burst repetition in the
data. For a model... | 1995-01-04 | 2016-08-30 | [
"astro-ph"
] | J. J. Brainerd (UAH), C. A. Meegan (NASA), Michael S. Briggs (UAH), G.
N. Pendleton (UAH), M. N. Brock (NASA) |
astro-ph/9501009 | COSMOLOGICAL ORIGIN OF QUASARS | Quasars are the earliest objects known to exist. We examine their origin in
the context of popular models for structure formation in the universe. We show
that seeds for quasar black holes could have originated from the initial
cosmological collapse of overdense regions with unusually small rotation. Most
of these seed... | 1995-01-04 | 2016-08-30 | [
"astro-ph"
] | Abraham Loeb (Harvard Univ.) |
astro-ph/9501011 | COSMOLOGICAL CONSTRAINTS FROM CLUSTER X-RAY MORPHOLOGIES | We use a representative sample of 65 galaxy clusters observed with the
Einstein IPC to constrain the range of cluster X-ray morphologies. We develop
and apply quantitative and reproducible measures to constrain the intrinsic
distributions of emission weighted centroid variation, axial ratio,
orientation, and the radial... | 1995-01-04 | 2016-08-30 | [
"astro-ph"
] | J.J. Mohr, A.E. Evrard, D.G. Fabricant & M.J. Geller |
astro-ph/9501005 | Gamma-Ray Transfer and Energy Deposition in Supernovae | Solutions to the energy-independent (gray) radiative transfer equations are
compared to results of Monte Carlo simulations of the \Ni and \Co radioactive
decay \GR energy deposition in supernovae. The comparison shows that an
effective, purely absorptive, gray opacity, \KG $\sim (0.06 \pm 0.01)Y_e$
cm$^2$ g$^{-1}$, whe... | 1995-01-04 | 2009-10-28 | [
"astro-ph"
] | Douglas A. Swartz (NASA Marshall Space Flight Center), Peter G.
Sutherland (McMaster University), Robert P. Harkness (University of Texas) |
astro-ph/9501006 | The origin of cosmic rays | The search for the origin of cosmic rays is a quest of almost a hundred
years. A recent theoretical proposal gives quantitative predictions, which can
be tested with data. Specifically, it has been suggested, that all cosmic rays
can be attributed to just three source sites: i) supernova explosions into the
interstella... | 1995-01-04 | 2016-08-30 | [
"astro-ph"
] | Peter L. Biermann |
astro-ph/9501008 | String Cosmology and Inflation | Following a suggestion by Gasperini and Veneziano, that String Cosmology can
be reconciled with Inflation and, hence, with the Standard Big Bang, we display
an analytical solution which possesses four interesting properties: (1) it is
non-singular; (2) it distinguishes the dynamics of the external scale factor,
$a(t)$,... | 1995-01-04 | 2011-04-20 | [
"astro-ph"
] | Carlo Angelantonj, Luca Amendola, Marco Litterio and Franco Occhionero
(Dipartimento di Fisica, Universit\`a degli Studi L'Aquila, Osservatorio
Astronomico di Roma) |
astro-ph/9501007 | ROSAT observations of the radio and gamma-ray pulsar PSR 1706-44 | We report on the detection of PSR 1706-44 in two ROSAT-PSPC observations. The
recorded source counts are unpulsed with a $2\sigma$ pulsed fraction upper
limit of 18%. Spectral analysis did not distinguish between black-body and
power law models; however, we argue that the lack of pulsations and the
similarity in the pu... | 1995-01-04 | 2007-05-23 | [
"astro-ph"
] | W.Becker, K.T.S.Barzier and J.Truemper |
astro-ph/9501002 | Turbulent Convection in Thin Accretion Disks | A self-consistent solution for a thin accretion disk with turbulent
convection is presented. The disk viscosity and the convective flux are derived
from a physical model for turbulence, and expressed in terms of the local
physical conditions of the disk which, in turn, are controlled by the former
two. In the gas press... | 1995-01-03 | 2009-10-28 | [
"astro-ph"
] | Itzhak Goldman and Amri Wandel |
astro-ph/9501003 | THE ORIGIN OF COSMIC RAYS | We propose that cosmic rays originate mainly in three sites, a) normal
supernova explosions into the interstellar medium, b) supernova explosions into
stellar winds, and c) hot spots of powerful radio galaxies. The proposal
depends on an assumption about the scaling of the turbulent diffusive transport
in cosmic ray me... | 1995-01-03 | 2016-08-30 | [
"astro-ph"
] | Peter L. Biermann |
astro-ph/9501004 | ROSAT Observations of Compact Groups of Galaxies | We have systematically analyzed a sample of 13 new and archival ROSAT PSPC
observations of compact groups of galaxies: 12 Hickson Compact Groups plus the
NCG 2300 group. We find that approximately two-thirds of the groups have
extended X-ray emission and, in four of these, the emission is resolved into
diffuse emission... | 1995-01-03 | 2016-08-30 | [
"astro-ph"
] | Rachel A. Pildis, Joel N. Bregman (Dept. of Astronomy, U. of
Michigan), and August E. Evrard (Dept. of Physics, U. of Michigan) |
astro-ph/9501001 | The Origin of Galactic Cosmic Rays | Motivated by recent measurements of the major components of the cosmic
radiation around 10 TeV/nucleon and above, we discuss the phenomenology of a
model in which there are two distinct kinds of cosmic ray accelerators in the
galaxy. Comparison of the spectra of hydrogen and helium up to 100 TeV per
nucleon suggests th... | 1995-01-02 | 2011-05-12 | [
"astro-ph"
] | Peter L. Biermann, T.K. Gaisser & Todor Stanev |
atom-ph/9512003 | Conditional Hamiltonian and Reset Operator in the Quantum Jump Approach | For the time development of a single system in the quantum jump approach or
for quantum trajectories one requires the conditional (reduced) Hamiltonian
between jumps and the reset operator after a jump. Explicit expressions for
them are derived for a general N-level system by employing the same assumptions
as in the us... | 1995-12-11 | 2009-10-28 | [
"atom-ph",
"physics.atom-ph"
] | Gerhard C. Hegerfeldt and Dirk G. Sondermann |
atom-ph/9512002 | Coulomb Energy Averaged over the $n\ell^N$-Atomic States with a Definite
Spin | A purely group-theoretical approach (for which the symmetric group plays a
central r\^ole), based upon the use of properties of fractional-parentage
coefficients and isoscalar factors, is developed for the derivation of the
Coulomb energy averaged over the states, with a definite spin, arising from an
atomic configurat... | 1995-12-04 | 2008-02-03 | [
"atom-ph",
"chem-ph",
"cond-mat",
"physics.atom-ph",
"quant-ph"
] | M. Kibler and Yu.F. Smirnov |
atom-ph/9512001 | The Periodic Table in Flatland | The $D$-dimensional Coulomb system serves as a starting point for generating
generalized atomic shells. These shells are ordered according to a generalized
Madelung rule in $D$ dimensions. This rule together with an {\it Aufbau
Prinzip} is applied to produce a $D$-dimensional periodic table. A model is
developed to rat... | 1995-12-02 | 2008-02-03 | [
"atom-ph",
"chem-ph",
"physics.atom-ph",
"quant-ph"
] | T. Negadi and M. Kibler |
atom-ph/9511002 | Two-Photon Spectroscopy Between States of Opposite Parities | Magnetic- and electric-dipole two-photon absorption (MED-TPA), recently
introduced as a new spectroscopic technique for studying transitions between
states of opposite parities, is investigated from a theoretical point of view.
A new approximation, referred to as {\it weak quasi-closure approximation}, is
used together... | 1995-11-29 | 2009-10-28 | [
"atom-ph",
"chem-ph",
"cond-mat",
"physics.atom-ph"
] | M. Daoud and M. Kibler |
atom-ph/9511001 | On the Use of Quantum Algebras in Rotation-Vibration Spectroscopy | A two-parameter deformation of the Lie algebra u$_2$ is used, in conjunction
with the rotor system and the oscillator system, to generate a model for
rotation-vibration spectroscopy of molecules and nuclei. | 1995-11-13 | 2008-02-03 | [
"atom-ph",
"chem-ph",
"math.QA",
"nucl-th",
"physics.atom-ph",
"q-alg"
] | R. Barbier and M. Kibler |
atom-ph/9510004 | Introduction to light forces, atom cooling, and atom trapping | This paper introduces and reviews light forces, atom cooling and atom
trapping. The emphasis is on the physics of the basic processes. In discussing
conservative forces the semi-classical dressed states are used rather than the
usual quantized field dressed states. | 1995-10-18 | 2015-06-24 | [
"atom-ph",
"physics.atom-ph"
] | Craig Savage (Dept. of Physics, Faculty of Science, ANU, ACT) |
atom-ph/9510003 | Band Gaps for Atoms in Light based Waveguides | The energy spectrum for a system of atoms in a periodic potential can exhibit
a gap in the band structure. We describe a system in which a laser is used to
produce a mechanical potential for the atoms, and a standing wave light field
is used to shift the atomic levels using the Autler-Townes effect, which
produces a pe... | 1995-10-10 | 2009-10-28 | [
"atom-ph",
"physics.atom-ph"
] | J.J. Hope and C.M. Savage |
atom-ph/9510002 | Quantum uncertainties in coupled harmonic oscillator | In this paper we analyze the quantum uncertainties and the photon statistics
in the interaction between the two modes of radiation by treating them as
coupled harmonic oscillator with the motivation of controlling quantum
properties of one light beam by another. Under the rotating wave approximation
(RWA) we show that ... | 1995-10-05 | 2010-12-14 | [
"atom-ph",
"physics.atom-ph",
"physics.optics",
"quant-ph"
] | Abir Bandyopadhyay and Jagdish Rai |
atom-ph/9510001 | Quantum state diffusion with a moving basis: computing quantum-optical
spectra | Quantum state diffusion (QSD) as a tool to solve quantum-optical master
equations by stochastic simulation can be made several orders of magnitude more
efficient if states in Hilbert space are represented in a moving basis of
excited coherent states. The large savings in computer memory and time are due
to the localiza... | 1995-10-03 | 2009-10-28 | [
"atom-ph",
"physics.atom-ph"
] | R. Schack, T. A. Brun, and I. C. Percival (Physics, QMW, University of
London) |
atom-ph/9509006 | Electron impact excitation cross sections for allowed transitions in
atoms | We present a semiempirical Gaunt factor for widely used Van Regemorter
formula [Astrophys. J. 136, 906 (1962)] for the case of allowed transitions in
atoms with the LS coupling scheme. Cross sections calculated using this Gaunt
factor agree with measured cross sections to within the experimental error. | 1995-09-28 | 2009-10-28 | [
"atom-ph",
"physics.atom-ph"
] | V. Fisher, V. Bernshtam, H. Golten and Y. Maron (Weizmann Institute of
Science) |
atom-ph/9509005 | Squeezing in the interaction of radiation with two-level atoms | We propose a simple experimental procedure to produce squeezing and other
non-classical properties like photon antibunching of radiation, and
amplification without population inversion. The method also decreases the
uncertainties of the angular-momentum quadratures representing the two-level
atomic system in the intera... | 1995-09-25 | 2010-09-28 | [
"atom-ph",
"physics.atom-ph",
"physics.optics",
"quant-ph"
] | Abir Bandyopadhyay and Jagdish Rai |
atom-ph/9509004 | Hyperspherical Close-Coupling Calculation of D-wave Positronium
Formation and Excitation Cross Sections in Positron-Hydrogen Scattering | Hyperspherical close-coupling method is used to calculate the elastic,
positronium formation and excitation cross sections for positron collisions
with atomic hydrogen at energies below the H(n=4) threshold for the J=2 partial
wave. The resonances below each inelastic threshold are also analyzed. The
adiabatic hypersph... | 1995-09-22 | 2015-06-24 | [
"atom-ph",
"physics.atom-ph"
] | Yan Zhou and C. D. Lin (Kansas State University) |
atom-ph/9509003 | Nuclear spin--rotation interaction in the hydrogen molecular ion | The nuclear spin--rotation interaction in the hyperfine structure of the
hydrogen molecular ion is investigated. The interaction constants are
determined and are found to differ in sign and magnitude compared to another
theory, but they are in agreement with some values derived from experiment. | 1995-09-20 | 2008-02-03 | [
"atom-ph",
"chem-ph",
"physics.atom-ph"
] | James F. Babb |
atom-ph/9509002 | Conventional Quantum Chemical Correlation Energy versus
Density-Functional Correlation Energy | We analyze the difference between the correlation energy as defined within
the conventional quantum chemistry framework and its namesake in
density-functional theory. Both quantities are rigorously defined concepts; one
finds that $E_c^{QC} \geq E_c^{DFT}$. We give numerical and analytical
arguments suggesting that the... | 1995-09-19 | 2008-02-03 | [
"atom-ph",
"chem-ph",
"physics.atom-ph"
] | E.K.U. Gross, M. Petersilka, T. Grabo |
atom-ph/9509001 | 2-2 and 2-3 Intercombination Transitions in Be-like Ions | We report here on calculation of probabilities of intercombination
transitions $2s^2$ $^1S_0$ - $2s2p$ $^3P_1$, $2s3p$ $^3P_1$ for Be-like ions
along the isoelectronic sequence for large range of $Z$. Our results obtained
with the $1/Z$ expansion method agree well with experimental data including the
recent ones. | 1995-09-16 | 2009-10-28 | [
"atom-ph",
"physics.atom-ph"
] | Yu.V.Ralchenko (Weizmann Institute of Science) and L.A.Vainshtein
(Lebedev Physical Institute) |
bayes-an/9512001 | Bayes linear covariance matrix adjustment | In this thesis, a Bayes linear methodology for the adjustment of covariance
matrices is presented and discussed. A geometric framework for quantifying
uncertainties about covariance matrices is set up, and an inner-product for
spaces of random matrices is motivated and constructed. The inner-product on
this space captu... | 1995-12-04 | 2016-08-31 | [
"bayes-an",
"physics.data-an"
] | Darren J Wilkinson (http://fourier.dur.ac.uk:8000/djw.html) |
bayes-an/9511001 | Bayesian Method of Moments (BMOM) Analysis of Mean and Regression Models | A Bayesian method of moments/instrumental variable (BMOM/IV) approach is
developed and applied in the analysis of the important mean and multiple
regression models. Given a single set of data, it is shown how to obtain
posterior and predictive moments without the use of likelihood functions, prior
densities and Bayes' ... | 1995-11-30 | 2008-02-03 | [
"bayes-an",
"physics.data-an"
] | Arnold Zellner (University of Chicago) |
bayes-an/9510001 | Bayesian Variable Selection with Related Predictors | In data sets with many predictors, algorithms for identifying a good subset
of predictors are often used. Most such algorithms do not account for any
relationships between predictors. For example, stepwise regression might select
a model containing an interaction AB but neither main effect A or B. This paper
develops m... | 1995-10-30 | 2008-02-03 | [
"bayes-an",
"physics.data-an"
] | Hugh Chipman (University of Chicago Graduate School of Business) |
bayes-an/9506004 | Suppressing Random Walks in Markov Chain Monte Carlo Using Ordered
Overrelaxation | Markov chain Monte Carlo methods such as Gibbs sampling and simple forms of
the Metropolis algorithm typically move about the distribution being sampled
via a random walk. For the complex, high-dimensional distributions commonly
encountered in Bayesian inference and statistical physics, the distance moved
in each itera... | 1995-06-22 | 2008-02-03 | [
"bayes-an",
"hep-lat",
"physics.data-an"
] | R. M. Neal (Department of Statistics, University of Toronto) |
bayes-an/9506003 | Minimal information in velocity space | Jaynes' transformation group principle is used to derive the objective prior
for the velocity of a non-zero rest-mass particle. In the case of classical
mechanics, invariance under the classical law of addition of velocities, leads
to an improper constant prior over the unbounded velocity space of classical
mechanics. ... | 1995-06-14 | 2009-10-28 | [
"bayes-an",
"physics.data-an"
] | Guillaume Evrard (GRAAL, Universite Montpellier II, France) |
bayes-an/9506002 | Bayes linear covariance matrix adjustment for multivariate dynamic
linear models | A methodology is developed for the adjustment of the covariance matrices
underlying a multivariate constant time series dynamic linear model. The
covariance matrices are embedded in a distribution-free inner-product space of
matrix objects which facilitates such adjustment. This approach helps to make
the analysis simp... | 1995-06-05 | 2008-02-03 | [
"bayes-an",
"physics.data-an"
] | Darren J Wilkinson (http://fourier.dur.ac.uk:8000/djw.html) and
Michael Goldstein |
bayes-an/9506001 | Bayes linear adjustment for variance matrices | We examine the problem of covariance belief revision using a geometric
approach. We exhibit an inner-product space where covariance matrices live
naturally --- a space of random real symmetric matrices. The inner-product on
this space captures aspects of our beliefs about the relationship between
covariance matrices of... | 1995-06-04 | 2008-02-03 | [
"bayes-an",
"physics.data-an"
] | Darren J Wilkinson (http://fourier.dur.ac.uk:8000/djw.html) and
Michael Goldstein |
bayes-an/9504001 | Confidence Intervals from One One Observation | Robert Machol's surprising result, that from a single observation it is
possible to have finite length confidence intervals for the parameters of
location-scale models, is re-produced and extended. Two previously unpublished
modifications are included. First, Herbert Robbins nonparametric confidence
interval is obtaine... | 1995-04-12 | 2008-04-17 | [
"bayes-an",
"physics.data-an"
] | Carlos C. Rodriguez (Albany) |
chao-dyn/9512009 | Smoothing Strange Attractors Using Splines | A noise-reduction algorithm for time-series of non-linear systems is
presented. The algorithm smoothes the attractors in phase space using
B-splines, allowing a more accurate measure of their dynamics. The algorithm is
tested on numerical and experimental data. It is linear in complexity, and can
be applied to embeddin... | 1995-12-31 | 2008-02-03 | [
"chao-dyn",
"nlin.CD"
] | Junheng Luo (Microsoft) and Dominique Thiebaut (Smith College) |
chao-dyn/9512008 | Level spacing distribution of pseudointegrable billiard | In this paper, we examine the level spacing distribution $P(S)$ of the
rectangular billiard with a single point-like scatterer, which is known as
pseudointegrable. It is shown that the observed $P(S)$ is a new type, which is
quite different from the previous conclusion. Even in the strong coupling
limit, the Poisson-li... | 1995-12-29 | 2008-11-26 | [
"chao-dyn",
"nlin.CD",
"nucl-th",
"quant-ph"
] | T.Shigehara, N.Yoshinaga, Taksu Cheon, T. Mizusaki |
chao-dyn/9512007 | Folded Bifurcation in Coupled Asymmetric Logistic Maps | A system of coupled two logistic maps, one periodic and the other chaotic, is
studied. It is found that with the variation of the coupling strength, the
system displays several curious features such as the appearance of quadrupling
of period, occurrence of isolated period three attractor and the coexistence of
the Hopf... | 1995-12-28 | 2008-11-26 | [
"chao-dyn",
"hep-th",
"nlin.CD",
"nucl-th"
] | Shoichi Midorikawa, Takayuki Kubo, Taksu Cheon |
chao-dyn/9512006 | Instantons and Intermittency | We propose the new method for finding the non-Gaussian tails of probability
distribution function (PDF) for solutions of a stochastic differential
equation, such as convection equation for a passive scalar, random driven
Navier-Stokes equation etc. Existence of such tails is generally regarded as a
manifestation of int... | 1995-12-27 | 2009-10-28 | [
"chao-dyn",
"cond-mat",
"hep-th",
"nlin.CD"
] | G. Falkovich, I. Kolokolov, V. Lebedev and A.Migdal |
chao-dyn/9512005 | Statistical Test for Dynamical Nonstationarity in Observed Time-Series
Data | Information in the time distribution of points in a state space reconstructed
from observed data yields a test for ``nonstationarity''. Framed in terms of a
statistical hypothesis test, this numerical algorithm can discern whether some
underlying slow changes in parameters have taken place. The method examines a
fundam... | 1995-12-21 | 2008-02-03 | [
"chao-dyn",
"nlin.CD"
] | Matthew B. Kennel (Oak Ridge National Laboratory and the University of
Tennessee, Knoxville) |
chao-dyn/9512004 | Characterization of chaos in random maps | We discuss the characterization of chaotic behaviours in random maps both in
terms of the Lyapunov exponent and of the spectral properties of the
Perron-Frobenius operator. In particular, we study a logistic map where the
control parameter is extracted at random at each time step by considering
finite dimensional appro... | 1995-12-12 | 2015-06-24 | [
"chao-dyn",
"nlin.CD"
] | V. Loreto, G. Paladin, M. Pasquini, A. Vulpiani |
chao-dyn/9512003 | Ergodic properties of quantized toral automorphisms | We study the ergodic properties for a class of quantized toral automorphisms,
namely the cat and Kronecker maps. The present work uses and extends the
results of [KL]. We show that quantized cat maps are strongly mixing, while
Kronecker maps are ergodic and non-mixing. We also study the structure of these
quantum maps ... | 1995-12-08 | 2008-02-03 | [
"chao-dyn",
"nlin.CD"
] | S. Klimek, A. Lesniewski, N. Maitra, R. Rubin |
chao-dyn/9512002 | Practical and algorithmical manifestations of quantum chaos | Quantum chaos manifests itself also in algorithmical complexity of methods,
including the numerical ones, in solving the Schr\"odinger equation. In this
contribution we address the problem of calculating the eigenenergies and the
eigenstates by various numerical methods applied to 2-dim generic billiard
systems. In par... | 1995-12-07 | 2008-02-03 | [
"chao-dyn",
"nlin.CD"
] | Baowen Li and Marko Robnik (CAMTP, University of Maribor, Slovenia) |
chao-dyn/9512001 | Classical and Quantum Chaotic Behaviors of Two Colliding Harmonic
Oscillators | We have systematically studied both classical and quantum chaotic behaviors
of two colliding harmonic oscillators. The classical case falls in
Kolmogorov-Arnold-Moser class. It is shown that there exists an energy
threshold, above which the system becomes nonintegrable. For some values of the
initial energy near the th... | 1995-12-01 | 2015-06-24 | [
"chao-dyn",
"nlin.CD"
] | Qing-Rong Zheng, Gang Su, and De-Hai Zhang |
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