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astro-ph2008★ 154 cited

WINGS-SPE Spectroscopy in the WIde-field Nearby Galaxy-cluster Survey

A. Cava, D. Bettoni, B. M. Poggianti +11

Aims. We present the results from a comprehensive spectroscopic survey of the WINGS (WIde-field Nearby Galaxy-cluster Survey) clusters, a program called WINGS-SPE. The WINGS-SPE sa…

astro-ph2008★ 10 cited

The VVDS-VLA Deep Field - IV: Radio-optical properties

S. Bardelli, E. Zucca, M. Bolzonella +51

(abridged) We use the 1.4 GHz VIMOS-VLA Deep Survey and the optical VVDS and the CFHT-LS to compare the properties of radio loud galaxies with respect to the whole population of op…

astro-ph2008★ 9 cited

Systematic thermal reduction of neutronization in core-collapse supernovae

A. F. Fantina, P. Donati, P. M. Pizzochero

We investigate to what extent the temperature dependence of the nuclear symmetry energy can affect the neutronization of the stellar core prior to neutrino trapping during gravitat…

astro-ph2008

INTEGRAL observes the 2007 outburst of the Be transient SAX J2103.5+4545

L. Ducci, L. Sidoli, A. Paizis +2

We performed a detailed study of the 2007 outburst of the 352s pulsar SAXJ2103.5+4545, a Be/X-ray transient observed by INTEGRAL, to study its spectral and temporal properties duri…

astro-ph2008★ 57 cited

The relationship between gas content and star formation rate in spiral galaxies. Comparing the local field with the Virgo cluster

M. Fumagalli, G. Gavazzi

Despite many studies of the star formation in spiral galaxies, a complete and coherent understanding of the physical processes that regulate the birth of stars has not yet been ach…

astro-ph2008★ 118 cited

2MASS wide field extinction maps: II. The Ophiuchus and the Lupus cloud complexe

Marco Lombardi, Charles J. Lada, Joao Alves

We present an extinction map of a ~1,700 deg sq region that encloses the Ophiuchus, the Lupus, and the Pipe dark complexes using 42 million stars from the Two Micron All Sky Survey…

astro-ph2008★ 137 cited

NICEST, a near-infrared color excess method tailored for small-scale structures

Marco Lombardi

Observational data and theoretical calculations show that significant small-scale substructures are present in dark molecular clouds. These inhomogeneities can provide precious hin…

astro-ph2008★ 53 cited

The construction of non-spherical models of quasi-relaxed stellar systems

G. Bertin, A. L. Varri

Spherical models of collisionless but quasi-relaxed stellar systems have long been studied as a natural framework for the description of globular clusters. Here we consider the con…

astro-ph2008★ 635 cited

Observation of the suppression of the flux of cosmic rays above 4x10^19eV

The Pierre Auger Collaboration

The energy spectrum of cosmic rays above 2.5x10^18eV, derived from 20,000 events recorded at the Pierre Auger Observatory, is described. The spectral index gamma of the flux, J ~ E…

astro-ph2008★ 144 cited

Radial metallicity profiles for a large sample of galaxy clusters observed with XMM-Newton

A. Leccardi, S. Molendi

Aims. We measured radial metallicity profiles for a sample of ~50 hot, intermediate redshift galaxy clusters, selected from the XMM-Newton archive. Methods. As in our previous pape…

astro-ph2008★ 53 cited

TRIS I: Absolute Measurements of the Sky Brightness Temperature at 0.6, 0.82 and 2.5 GHz

M. Zannoni, A. Tartari, M. Gervasi +4

At frequencies close to 1 GHz the sky diffuse radiation is a superposition of radiation of Galactic origin, the 3 K Relic or Cosmic Microwave Background Radiation, and the signal p…

astro-ph2008★ 16 cited

On the Fundamental Plane of the Galactic Globular Cluster System

M. Pasquato, G. Bertin

The globular clusters (GC) of our Galaxy have been found to lie close to a plane in the log(R_e), log(sigma), SB_e space, on the continuation of the Fundamental Plane (FP) known to…

astro-ph2008★ 24 cited

A twelve-image gravitational lens system in the z ~ 0.84 cluster Cl J0152.7-1357

C. Grillo, M. Lombardi, P. Rosati +6

Gravitational lens modeling is presented for the first discovered example of a three-component source for which each component is quadruply imaged. The lens is a massive galaxy mem…

astro-ph2008★ 75 cited

SPACE: the SPectroscopic All-sky Cosmic Explorer

A. Cimatti, M. Robberto, C. M. Baugh +18

We describe the scientific motivations, the mission concept and the instrumentation of SPACE, a class-M mission proposed for concept study at the first call of the ESA Cosmic-Visio…

astro-ph2008★ 58 cited

The complex light-curve of the afterglow of GRB071010A

S. Covino, P. D'Avanzo, A. Klotz +51

We present and discuss the results of an extensive observational campaign devoted to GRB071010A, a long-duration gamma-ray burst detected by the Swift satellite. This event was fol…

astro-ph2008★ 5 cited

The White Mountain Polarimeter Telescope and an Upper Limit on CMB Polarization

Alan R. Levy, Rodrigo Leonardi, Markus Ansmann +18

The White Mountain Polarimeter (WMPol) is a dedicated ground-based microwave telescope and receiver system for observing polarization of the Cosmic Microwave Background. WMPol is l…

astro-ph2008★ 228 cited

Radial temperature profiles for a large sample of galaxy clusters observed with XMM-Newton

A. Leccardi, S. Molendi

Aims. We measure, as far out as possible, radial temperature profiles for a sample of ~50 hot, intermediate redshift galaxy clusters, selected from the XMM-Newton archive, keeping…

astro-ph2008★ 53 cited

Vortex-nucleus interaction in the inner crust of neutron stars

P. Avogadro, F. Barranco, R. A. Broglia +1

The structure of a vortex in the inner crust of neutron stars is calculated within the framework of quantum mean field theory taking into account the interaction with the nuclei co…

astro-ph2008★ 18 cited

Gravitational Lensing Constraints on Dynamical and Coupled Dark Energy

G. La Vacca, L. P. L. Colombo

Upcoming Weak Lensing (WL) surveys can be used to constrain Dark Energy (DE) properties, namely if tomographic techniques are used to improve their sensitivity. In this work, we us…

astro-ph2008★ 153 cited

UV Dust Attenuation in Star-forming Galaxies: II Calibrating the A(UV) vs. L_TIR/L_UV relation

L. Cortese, A. Boselli, P. Franzetti +4

We investigate the dependence of the total-infrared (TIR) to UV luminosity ratio method for calculating the UV dust attenuation A(UV) from the age of the underlying stellar populat…

astro-ph2008★ 212 cited

Upper limit on the cosmic-ray photon flux above 10^19 eV using the surface detector of the Pierre Auger Observatory

The Pierre Auger Collaboration

A method is developed to search for air showers initiated by photons using data recorded by the surface detector of the Auger Observatory. The approach is based on observables sens…

astro-ph2008★ 163 cited

Hipparcos distances of Ophiuchus and Lupus cloud complexes

M. Lombardi, C. Lada, J. Alves

We combine extinction maps from the Two Micron All Sky Survey (2MASS) with Hipparcos and Tycho parallaxes to obtain reliable and high-precision estimates of the distance to the Oph…

astro-ph2008

On the role of the far fields and of cosmology for the theory of gravitation and for the dark matter problem

A. Carati, S. L. Cacciatori, L. Galgani

We give an estimate of the gravitational field of force exerted on a test particle by the far galaxies, in the frame of the weak field approximation. In virtue of Hubble's law, the…

astro-ph2007★ 25 cited

Stellar mass estimates in early-type galaxies from lensing+dynamical and photometric measurements

C. Grillo, R. Gobat, P. Rosati +1

In this paper we compare two different diagnostics for estimating stellar masses in early-type galaxies and we establish their level of reliability. In particular, we consider the…