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19922026
Showing 2006Show all

189 papers · 1 filter

hep-th2006★ 28 cited

Moduli Fields as Quintessence and the Chameleon

Philippe Brax, Jerome Martin

We consider models where moduli fields are not stabilized and play the role of quintessence. In order to evade gravitational tests, we investigate the possibility that moduli behav…

astro-ph2006★ 315 cited

The XMM-Newton wide-field survey in the COSMOS field: VI. Statistical properties of clusters of galaxies

A. Finoguenov, L. Guzzo, G. Hasinger +30

We present the results of a search for galaxy clusters in the first 36 XMM-Newton pointings on the COSMOS field. We reach a depth for a total cluster flux in the 0.5-2 keV band of…

astro-ph2006★ 175 cited

The XMM-Newton wide-field survey in the COSMOS field: III. optical identification and multiwavelength properties of a large sample of X-ray selected sources

M. Brusa, G. Zamorani, A. Comastri +31

[ABRIGED] We present the optical identification of a sample of 695 X-ray sources detected in the first 1.3 deg^2 of the XMM-COSMOS survey, down to a 0.5-2 keV (2-10 keV) limiting f…

astro-ph2006★ 151 cited

Photometric Redshifts of Galaxies in COSMOS

B. Mobasher, P. Capak, N. Z. Scoville +26

We measure photometric redshifts and spectral types for galaxies in the COSMOS survey. We use template fitting technique combined with luminosity function priors and with the optio…

astro-ph2006★ 86 cited

On the "Galactic Habitable Zone"

Nikos Prantzos

The concept of Galactic Habitable Zone (GHZ) was introduced a few years ago as an extension of the much older concept of Circumstellar Habitable Zone. However, the physical process…

astro-ph2006★ 1k cited

zCOSMOS: A Large VLT/VIMOS redshift survey covering 0 < z < 3 in the COSMOS field

S. J. Lilly, O. Le Fevre, A. Renzini +42

zCOSMOS is a large redshift survey that is being undertaken in the COSMOS field using 600 hours of observation with the VIMOS spectrograph on the 8-m VLT. The survey is designed to…

astro-ph2006★ 3 cited

High Energy Astroparticle Physics

Guenter Sigl

We give a brief (and highly incomplete) overview of the current experimental and theoretical status of high energy cosmic rays and their secondary gamma-rays and neutrinos. We focu…

astro-ph2006★ 15 cited

MoLUSC: A MOck Local Universe Survey Constructor

T. Sousbie, H. Courtois, G. Bryan +1

This paper presents MoLUSC, a new method for generating mock galaxy catalogs from a large scale ( Mpc) dark matter simulation, that requires only modest CPU tim…

astro-ph2006★ 136 cited

531 new spectroscopic redshifts from the CDFS and a test on the cosmological relevance of the GOODS-South field

C. D. Ravikumar, M. Puech, H. Flores +23

(Abbrev.) This paper prepares a series of papers analysing the Intermediate MAss Galaxy Evolution Sequence (IMAGES) up to z=1. Intermediate mass galaxies (MJ <=-20.3) are selected…

gr-qc2006★ 50 cited

Gravitational waves generated by second order effects during inflation

Bob Osano, Cyril Pitrou, Peter Dunsby +2

The generation of gravitational waves during inflation due to the non-linear coupling of scalar and tensor modes is discussed. Two methods describing gravitational wave perturbatio…

astro-ph2006★ 7 cited

Probing inflation with CMB polarization : weak lensing effect on the covariance of CMB spectra

Jonathan Rocher, Karim Benabed, Francois Bouchet

CMB anisotropies are modified by the weak lensing effect of intervening large scale structures on the photon path from the last scattering surface to the observer. This has to be a…

astro-ph2006★ 59 cited

Active galactic nuclei and massive galaxy cores

Sebastien Peirani, Scott Kay, Joe Silk

(Context) Central active galactic nuclei (AGN) are supposed to play a key role in the evolution of their host galaxies. In particular, the dynamical and physical properties of the…

astro-ph2006★ 175 cited

Large Structures and Galaxy Evolution in COSMOS at z < 1.1

N. Scoville, H. Aussel, A. Benson +25

We present the first identification of large-scale structures (LSS) at z in the Cosmic Evolution Survey (COSMOS). The structures are identified from adaptive smoothing of g…

astro-ph2006★ 510 cited

COSMOS : Hubble Space Telescope Observations

N. Scoville, A. Benson, A. W. Blain +50

The Cosmic Evolution Survey (COSMOS) was initiated with an extensive allocation (590 orbits in Cycles 12-13) using the Hubble Space Telescope (HST) for high resolution imaging. Her…

astro-ph2006★ 304 cited

Combining Strong and Weak Gravitational Lensing in Abell 1689

M. Limousin, J. Richard, E. Jullo +14

We present a reconstruction of the mass distribution of galaxy cluster Abell 1689 at z = 0.18 using detected strong lensing features from deep HST/ACS observations and extensive gr…

astro-ph2006★ 2 cited

Scalar-field quintessence by cosmic shear: CFHT data analysis and forecasts for DUNE

Carlo Schimd, Ismael Tereno

A light scalar field, minimally or not-minimally coupled to the metric field, is a well-defined candidate for the dark energy, overcoming the coincidence problem intrinsic to the c…

astro-ph2006★ 116 cited

AGN self-regulation in cooling flow clusters

A. Cattaneo, R. Teyssier

We use three-dimensional high-resolution adaptive-mesh-refinement simulations to investigate if mechanical feedback from active galactic nucleus jets can halt a massive cooling flo…

astro-ph2006★ 22 cited

Detecting cold gas at intermediate redshifts: GMRT survey using Mg II systems

Neeraj Gupta, R. Srianand, P. Petitjean +3

Intervening HI 21-cm absorption systems at z > 1.0 are very rare and only 4 confirmed detections have been reported in the literature. Despite their scarcity, they provide interest…

gr-qc2006★ 4 cited

General Relativistic Dynamics of Compact Binary Systems

Luc Blanchet

The equations of motion of compact binary systems have been derived in the post-Newtonian (PN) approximation of general relativity. The current level of accuracy is 3.5PN order. Th…

astro-ph2006★ 3 cited

Lattice Melting and Rotation in Perpetually Pulsating Equilibria

C. Pichon, D. Lynden-Bell, J. Pichon +1

Systems whose potential energies consists of pieces that scale as r^-2 together with pieces that scale as r^2, show no violent relaxation to Virial equilibrium but may pulsate at c…

astro-ph2006★ 24 cited

Theoretical orbital period distributions of cataclysmic variables above the period gap: effects of circumbinary disks

B. Willems, R. Taam, U. Kolb +2

The population of non magnetic cataclysmic variables evolving under the influence of a circumbinary disk is investigated for systems above the upper edge of the period gap at orbit…

astro-ph2006★ 4 cited

The chemical evolution of the Milky Way in a cosmological context

N. Prantzos

A short overview is presented of several topics concerning the evolution of the Milky Way (MW) in a cosmological context. In particular, the metallicity distribution of the MW halo…

astro-ph2006★ 714 cited

Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters

T. Decressin, G. Meynet, C. Charbonnel +2

We propose the Wind of Fast Rotating Massive Stars scenario to explain the origin of the abundance anomalies observed in globular clusters. We compute and present models of fast ro…

astro-ph2006★ 9 cited

Multiwavelength investigation of a near-solar metallicity sub-DLA at z =1.3647 towards PKS 0237-233

Raghunathan Srianand, Neeraj Gupta, Patrick Petitjean

We searched for 21-cm absorption associated with the z_abs = 1.3647 absorption system toward PKS 0237-233 using the GMRT. A high quality UVES spectrum shows that C I and C I* are d…