output
19912026
Showing 2003 · astro-phShow all

111 papers · 2 filters

astro-ph2003★ 56 cited

XMM-Newton observations of Sagittarius A East

Masaaki Sakano, Robert S. Warwick, Anne Decourchelle +1

We present an analysis of a recent XMM-Newton observation of Sgr A East, a supernova remnant located close to the Galactic Centre. Very high quality X-ray spectra reveal many emiss…

astro-ph2003

Structural and scaling properties of galaxy clusters: probing the physics of structure formation

M. Arnaud, G. W. Pratt, E. Pointecouteau

We present XMM-Newton studies of the total mass, gas density, temperature and entropy profiles in nearby hot and cool clusters, together with follow-up observations of distant clus…

astro-ph2003★ 55 cited

Measurement of Cosmic Shear with the Space Telescope Imaging Spectrograph

Jason Rhodes, Alexandre Refregier, Nicholas R. Collins +3

Weak lensing by large-scale structure allows a direct measure of the dark matter distribution. We have used parallel images taken with the Space Telescope Imaging Spectrograph (STI…

astro-ph2003★ 37 cited

XMM-Newton Observations of the Ultraluminous Nuclear X-ray Source in M33

L. Foschini, J. Rodriguez, Y. Fuchs +5

We present observations with XMM-Newton of M33 X-8, the ultraluminous X-ray source (L_{0.5-10 keV} ~ 2x10^39 erg/s) closest to the centre of the galaxy. The best-fit model is simil…

astro-ph2003★ 115 cited

Hints for a fast precessing relativistic radio jet in LS I +61 303

M. Massi, M. Ribo, J. M. Paredes +3

Here we discuss two consecutive MERLIN observations of the X-ray binary LS I +61 303. The first observation shows a double-sided jet extending up to about 200 AU on both sides of a…

astro-ph2003★ 51 cited

Well-proportioned universes suppress CMB quadrupole

Jeffrey Weeks, Jean-Pierre Luminet, Alain Riazuelo +1

A widespread myth asserts that all small universe models suppress the CMB quadrupole. In actual fact, some models suppress the quadrupole while others elevate it, according to whet…

astro-ph2003★ 90 cited

Dust emission in early-type galaxies: The mid-infrared view

E. M. Xilouris, S. C. Madden, F. Galliano +2

We present mid-infrared (MIR) maps for a sample of 18 early-type galaxies observed at 4.5, 6.7 and 15 microns with the ISOCAM instrument on board the ISO satellite with a 6'' spati…

astro-ph2003★ 57 cited

Detection and discrimination of cosmological non-Gaussian signatures by multi-scale methods

J. L. Starck, N. Aghanim, O. Forni

Recent Cosmic Microwave Background (CMB) observations indicate that the temperature anisotropies arise from quantum fluctuations in the inflationary scenario. In the simplest infla…

astro-ph2003★ 53 cited

An XMM-Newton observation of the dynamically active binary cluster A1750

E. Belsole, G. W. Pratt, J-L. Sauvageot +1

We present results from the XMM-Newton observation of the binary cluster A1750 at z = 0.086. We have performed a detailed study of the surface brightness, temperature and entropy d…

astro-ph2003★ 130 cited

The radio galaxy K-z relation: the 10^12 Msol mass limit; masses of galaxies from the L_K luminosity, up to z >4

B. Rocca-Volmerange, D. Le Borgne, C. De Breuck +2

The narrow K-z relation of powerful radio galaxies in the Hubble K diagram is often attributed to the stellar populations of massive elliptical galaxies. Extended over a large rang…

astro-ph2003★ 118 cited

A transient large-scale relativistic radio jet from GX 339-4

Elena Gallo, Stephane Corbel, Rob Fender +2

We report on the formation and evolution of a large-scale, synchrotron-emitting jet from the black hole candidate and X-ray binary system GX 339-4. In 2002 May, the source moved fr…

astro-ph2003★ 34 cited

High order correlation functions for self interacting scalar field in de Sitter space

Francis Bernardeau, Tristan Brunier, Jean-Philippe Uzan

We present the expressions of the three- and four-point correlation functions of a self interacting light scalar field in a de Sitter spacetime at tree order respectively for a cub…

astro-ph2003★ 18 cited

Finite volume effects for non-Gaussian multi-field inflationary models

Francis Bernardeau, Jean-Philippe Uzan

Models of multi-field inflation exhibiting primordial non-Gaussianity have recently been introduced. This is the case in particular if the fluctuations of a light field scalar fiel…

astro-ph2003★ 83 cited

Cosmic microwave background anisotropies in multi-connected flat spaces

Alain Riazuelo, Jeffrey Weeks, Jean-Philippe Uzan +2

This article investigates the signature of the seventeen multi-connected flat spaces in cosmic microwave background (CMB) maps. For each such space it recalls a fundamental domain…

astro-ph2003★ 94 cited

The Connection between W31, SGR 1806-20, & LBV 1806-20: Distance, Extinction, and Structure

S. Corbel, Stephen S. Eikenberry

We present new millimeter and infrared spectroscopic observations towards the radio nebula G10.0-0.3, which is powered by the wind of the Luminous Blue Variable star LBV 1806-20, a…

astro-ph2003★ 4 cited

Collisions between carbonaceous grains in the interstellar medium

Reanud Papoular

Semi-empirical molecular dynamics is used to simulate hydrocarbon grain sputtering and collisions which are extremely difficult to study experimentally. This microscopic and dynami…

astro-ph2003★ 36 cited

Dust enshrouded star-forming activity in Arp 299

P. Gallais, V. Charmandaris, E. Le Floc'h +4

We present mid-infrared spectro-imaging (5 - 16 microns) observations of the infrared luminous interacting system Arp 299 (=Mrk171 =IC694+NGC3690) obtained with the ISOCAM instrume…

astro-ph2003★ 66 cited

Star formation rates of distant luminous infrared galaxies derived from Halpha and IR luminosities

H. Flores, F. Hammer, D. Elbaz +4

We present a study of the star formation rate (SFR) for a sample of 16 distant galaxies detected by ISOCAM at 15um in the CFRS0300+00 and CFRS1400+52 fields. Their high quality and…

astro-ph2003★ 75 cited

Possible Evidence for MeV Dark Matter In Dwarf Spheroidals

Dan Hooper, Francesc Ferrer, Céline Boehm +4

It has been recently proposed that the observed 511 keV emission from the Galactic bulge could be the product of very light (1-100 MeV) annihilating dark matter particles. Other po…

astro-ph2003★ 152 cited

SPI/INTEGRAL in-flight performance

J. -P. Roques, S. Schanne, A. von Kienlin +23

The SPI instrument has been launched on-board the INTEGRAL observatory on October 17, 2002. SPI is a spectrometer devoted to the sky observation in the 20 keV-8 MeV energy range us…

astro-ph2003★ 90 cited

XMM-Newton observation of Kepler's supernova remnant

G. Cassam-Chenai, A. Decourchelle, J. Ballet +3

We present the first results coming from the observation of Kepler's supernova remnant obtained with the EPIC instruments on board the XMM-Newton satellite. We focus on the images…

astro-ph2003★ 57 cited

On the optical extinction and distance of GRS 1915+105

C. Chapuis, S. Corbel

Based on new millimeter and radio observations, we reevaluate the total hydrogen column density along the line of sight to the microquasar GRS 1915+105 to NH=(3.5 +/- 0.3) 10^22 cm…

astro-ph2003★ 37 cited

Calibration of the EDELWEISS Cryogenic Heat-and-ionisation Germanium Detectors for Dark Matter Search

The EDELWEISS Collaboration, O. Martineau, A. Benoit +34

Several aspects of the analysis of the data obtained with the cryogenic heat-and-ionisation Ge detectors used by the EDELWEISS dark matter search experiment are presented. Their ca…

astro-ph2003★ 35 cited

Abundance differences between the neutral and the ionized gas of the dwarf galaxy IZw 36

V. Lebouteiller, D. Kunth, J. Lequeux +4

We present a FUSE spectroscopic study of the nearby gas--rich, metal--deficient blue compact dwarf (BCD) galaxy IZw 36. Atomic hydrogen and many metal lines are observed in absorpt…