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19922026
Showing 2005Show all

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astro-ph2005

Multiband optical monitoring of the blazars S5 0716+714 and BL Lacertae

C. S. Stalin, Gopal-Krishna, Ram Sagar +3

We report results of multiband optical monitoring of two well known blazars, S5 0716+714 and BL Lacertae, carried out in 1996 and 2000-01 with an aim to study optical variations on…

astro-ph2005★ 74 cited

Mass distribution in nearby Abell clusters

Ewa L. Lokas, Radoslaw Wojtak, Stefan Gottloeber +2

We study the mass distribution in six nearby (z<0.06) relaxed Abell clusters of galaxies A0262, A0496, A1060, A2199, A3158 and A3558. Given the dominance of dark matter in galaxy c…

astro-ph2005★ 15 cited

An investigation of the submillimeter background radiation using SCUBA and Spitzer

S. Dye, S. A. Eales, M. L. N. Ashby +8

We investigate the redshift dependence of the contribution to the extragalactic far-infrared/sub-millimeter background from galaxies detected by the Spitzer Space Telescope at 8um…

astro-ph2005★ 66 cited

On the intensity and spatial morphology of the 511 keV emission in the Milky Way

Nikos Prantzos

The positron emissivity of the Galactic bulge and disk, resulting from radioactivity of SNIa, is reassessed in the light of a recent evaluation of the SNIa rate. It is found that t…

astro-ph2005★ 20 cited

Kinematics and star formation activity in the z=2.03954 damped Lyman-alpha system towards PKS 0458-020

Janine Heinmueller, Patrick Petitjean, Cedric Ledoux +2

We present UVES observations of the log N(HI)= 21.7 damped Lyman-alpha system at z=2.03954 towards the quasar PKS 0458-020. HI Lyman-alpha emission is detected in the center of the…

astro-ph2005★ 63 cited

The VIMOS-VLT Deep Survey: Luminosity dependence of clustering at z~1

A. Pollo, L. Guzzo, O. Le Fevre +2

We investigate the dependence of galaxy clustering on the galaxy intrinsic luminosity at high redshift, using the data from the First Epoch VIMOS-VLT Deep Survey (VVDS). The size (…

astro-ph2005★ 9 cited

Critical revision of the ZEPLIN-I sensitivity to WIMP interactions

A. Benoit, M. Chapellier, G. Chardin +10

The ZEPLIN collaboration has recently published its first result presenting a maximum sensitivity of picobarn for a WIMP mass of 60 GeV. The analysis…

hep-th2005★ 29 cited

On the Reliability of the Langevin Pertubative Solution in Stochastic Inflation

Jerome Martin, Marcello Musso

A method to estimate the reliability of a perturbative expansion of the stochastic inflationary Langevin equation is presented and discussed. The method is applied to various infla…

astro-ph2005★ 222 cited

Planet formation and migration

John C B Papaloizou, Caroline Terquem

We review the observations of extrasolar planets, ongoing developments in theories of planet formation, orbital migration, and the evolution of multiplanet systems.

astro-ph2005★ 38 cited

The ISO 170um Luminosity Function of Galaxies

Tsutomu T. Takeuchi, Takako T. Ishii, Herve Dole +3

We constructed a local luminosity function (LF) of galaxies using a flux-limited sample (S_170 > 0.195Jy) of 55 galaxies at z < 0.3 taken from the ISO FIRBACK survey at 170um. The…

astro-ph2005★ 34 cited

Spectrophotometric properties of galaxies at intermediate redshifts (z ~ 0.2--1.0) II. The Luminosity -- Metallicity relation

Fabrice Lamareille, Thierry Contini, Jarle Brinchmann +3

We present the gas-phase oxygen abundance (O/H) for a sample of 131 star-forming galaxies at intermediate redshifts (). The sample selection, the spectroscopic observati…

astro-ph2005★ 34 cited

Spectrophotometric properties of galaxies at intermediate redshifts (z ~ 0.2--1.0) I. Sample description, photometric properties and spectral measurements

Fabrice Lamareille, Thierry Contini, Jean-François Le Borgne +3

We present the spectrophotometric properties of a sample of 141 emission-line galaxies at redshifts in the range with a peak around . The analysis is bas…

hep-th2005★ 44 cited

Solving Stochastic Inflation for Arbitrary Potentials

Jerome Martin, Marcello Musso

A perturbative method for solving the Langevin equation of inflationary cosmology in presence of backreaction is presented. In the Gaussian approximation, the method permits an exp…

astro-ph2005★ 91 cited

The effect of minihaloes on cosmic reionization

B. Ciardi, E. Scannapieco, F. Stoehr +3

One of the most debated issues in the theoretical modeling of cosmic reionization is the impact of small-mass gravitationally-bound structures. We carry out the first numerical inv…

astro-ph2005★ 31 cited

The energetics, evolution, and stellar depletion of Li6 in the early Galaxy

Nikos Prantzos

Motivated by the recent report of a high Li6 ``plateau'' extending to low metallicities in Galactic halo stars, we study the energetics of an early production of Li6 through the in…

astro-ph2005★ 85 cited

Emission Line Properties of Seyfert 2 Nuclei

Qiusheng Gu, Jorge Melnick, Roberto Cid Fernandes +3

We present a study of the global properties of Joguet's sample of 65 Seyfert 2 galaxies. We use the population synthesis models of our Paper II to derive `pure' emission-line spect…

astro-ph2005★ 58 cited

Epicyclic oscillations of fluid bodies Paper II. Strong gravity

Marek A. Abramowicz, Omer M. Blaes, Jiri Horak +2

Fluids in external gravity may oscillate with frequencies characteristic of the epicyclic motions of test particles. We explicitly demonstrate that global oscillations of a slender…

astro-ph2005★ 532 cited

High-resolution Millimeter Imaging of Submillimeter Galaxies

L. J. Tacconi, R. Neri, S. C. Chapman +8

We present sub-arcsecond resolution IRAM PdBI interferometry of eight submillimeter galaxies at redshifts from 2 to 3.4, where we detect continuum at 1mm and/or CO lines at 3 and 1…

astro-ph2005★ 2 cited

Gamma Ray Astronomy with Magnetized Zevatrons

Eric Armengaud, Guenter Sigl, Francesco Miniati

Nearby sources of cosmic rays up to a ZeV(=10^21 eV) could be observed with a multi-messenger approach including secondary gamma-rays and neutrinos. If cosmic rays above ~10^18 eV…

astro-ph2005★ 28 cited

A search for distant radio galaxies from SUMSS and NVSS: II. Optical Spectroscopy

Carlos De Breuck, Ilana Klamer, Helen Johnston +4

This is the second in a series of papers presenting observations and results for a sample of 76 ultra-steep-spectrum (USS) radio sources in the southern hemisphere designed to find…

astro-ph2005★ 256 cited

First cosmic shear results from the Canada-France-Hawaii Telescope Wide Synoptic Legacy Survey

H. Hoekstra, Y. Mellier, L. van Waerbeke +6

We present the first measurements of the weak gravitational lensing signal induced by the large scale mass distribution from data obtained as part of the ongoing Canada-France-Hawa…

hep-th2005★ 27 cited

Vacuum Geometry and the Search for New Physics

James Gray, Yang-Hui He, Vishnu Jejjala +1

We propose a new guiding principle for phenomenology: special geometry in the vacuum space. New algorithmic methods which efficiently compute geometric properties of the vacuum spa…

astro-ph2005★ 87 cited

The VIMOS-VLT Deep Survey - The evolution of galaxy clustering per spectral type to z~1.5

B. Meneux, O. LeFevre, L. Guzzo +47

We measure the evolution of clustering for galaxies with different spectral types from 6495 galaxies with 17.5<=I_AB<=24 and measured spectroscopic redshift in the first epoch VIMO…

astro-ph2005★ 293 cited

Cosmological evolution of cosmic string loops

Christophe Ringeval, Mairi Sakellariadou, Francois Bouchet

The existence of a scaling evolution for cosmic string loops in an expanding universe is demonstrated for the first time by means of numerical simulations. In contrast with what is…