Search Publications
Evidence for powerful AGN winds at high redshift: dynamics of galactic outflows in radio galaxies during the ``Quasar Era''
De Breuck, C.; van Breugel, W.; Lehnert, M. D. +2 more
AGN feedback now appears as an attractive mechanism to resolve some of the outstanding problems with the “standard” cosmological models, in particular those related to massive galaxies. At low redshift, evidence is growing that gas cooling and star formation may be efficiently suppressed by mechanical energy input from radio sources. To directly c…
The first XMM-Newton slew survey catalogue: XMMSL1
Altieri, B.; Read, A. M.; Esquej, P. +3 more
Aims:We report on the production of a large area, shallow, sky survey, from XMM-Newton slews. The great collecting area of the mirrors coupled with the high quantum efficiency of the EPIC detectors have made XMM-Newton the most sensitive X-ray observatory flown to date. We use data taken with the EPIC-pn camera during slewing manoeuvres to perform…
Ground-based detection of sodium in the transmission spectrum of exoplanet HD 209458b
Snellen, I. A. G.; Albrecht, S.; Le Poole, R. S. +1 more
Context: The first detection of an atmosphere around an extrasolar planet was presented by Charbonneau and collaborators in 2002. In the optical transmission spectrum of the transiting exoplanet HD 209458b, an absorption signal from sodium was measured at a level of 0.023 ± 0.006%, using the STIS spectrograph on the Hubble Space Telescope. Despite…
CoRoT sounds the stars: p-mode parameters of Sun-like oscillations on HD 49933
Auvergne, M.; Baudin, F.; Jiménez-Reyes, S. J. +19 more
Context: The first asteroseismology results from CoRoT are presented, on a star showing Sun-like oscillations. We have analyzed a 60 day lightcurve of high-quality photometric data collected by CoRoT on the F5 V star HD 49933. The data reveal a rich spectrum of overtones of low-degree p modes.
Aims: Our aim was to extract robust estimates of t…
The EPIC-MOS particle-induced background spectra
Kuntz, K. D.; Snowden, S. L.
Context: To analyze diffuse emission that fills the field of view, one must accurately characterize the instrumental backgrounds. For the XMM-Newton EPIC-MOS instrument these backgrounds include a temporally variable “quiescent” component, as well as the strongly variable soft proton contamination.
Aims: We have characterized the spectral and …
HESS very-high-energy gamma-ray sources without identified counterparts
Santangelo, A.; Ripken, J.; Carrigan, S. +141 more
Context: The detection of gamma rays in the very-high-energy (VHE) energy range (100 GeV-100 TeV) provides a direct view of the parent population of ultra-relativistic particles found in astrophysical sources. For this reason, VHE gamma rays are useful for understanding the underlying astrophysical processes in non-thermal sources.
Aims: We in…
Transiting exoplanets from the CoRoT space mission. II. CoRoT-Exo-2b: a transiting planet around an active G star
Mazeh, T.; Aigrain, S.; Alonso, R. +40 more
Context: The CoRoT mission, a pioneer in exoplanet searches from space, has completed its first 150 days of continuous observations of ~12 000 stars in the galactic plane. An analysis of the raw data identifies the most promising candidates and triggers the ground-based follow-up.
Aims: We report on the discovery of the transiting planet CoRoT…
Transiting exoplanets from the CoRoT space mission . VI. CoRoT-Exo-3b: the first secure inhabitant of the brown-dwarf desert
Mazeh, T.; Aigrain, S.; Zucker, S. +39 more
Context: The CoRoT space mission routinely provides high-precision photometric measurements of thousands of stars that have been continuously observed for months.
Aims: The discovery and characterization of the first very massive transiting planetary companion with a short orbital period is reported.
Methods: A series of 34 transits was de…
Radial temperature profiles for a large sample of galaxy clusters observed with XMM-Newton
Molendi, S.; Leccardi, A.
Aims: We measure radial temperature profiles as far out as possible for a sample of ≈50 hot, intermediate redshift galaxy clusters, selected from the XMM-Newton archive, keeping systematic errors under control.
Methods: Our work is characterized by two major improvements. First, we used background modeling, rather than background subtraction, …
Galaxy-cluster gas-density distributions of the representative XMM-Newton cluster structure survey (REXCESS)
Böhringer, H.; Arnaud, M.; Pointecouteau, E. +7 more
We present a study of the structural and scaling properties of the gas distributions in the intracluster medium (ICM) of 31 nearby (z < 0.2) clusters observed with XMM-Newton, which together comprise the Representative XMM-Newton Cluster Structure Survey (REXCESS). In contrast to previous studies, this sample is unbiased with respect to X-ray s…