Search Publications
Stellar populations in the CFHTLS. I. New constraints on the IMF at low mass
Schultheis, M.; Bertin, E.; McCracken, H. J. +4 more
We present a stellar populations analysis of the first release of the CFHTLS (Canada-France-Hawai Telescope Legacy Survey) data. A detailed comparison between the Besançon model of the Galaxy and the first data release of the CFHTLS-Deep survey is performed by implementing the MEGACAM photometric system in this model using stellar atmosphere model…
The structure and X-ray radiation spectra of illuminated accretion disks in AGN. III. Modeling fractional variability
Ponti, G.; Różańska, A.; Dovčiak, M. +5 more
Context: .Random magnetic flares above the accretion disks of Active Galactic Nuclei can account for the production of the primary radiation and for the rapid X-ray variability that have been frequently observed in these objects. The primary component is partly reprocessed in the disk atmosphere, forming a hot spot underneath the flare source and …
A detailed observation of a LMC supernova remnant DEM L241 with XMM-Newton
Koyama, K.; Mori, K.; Bamba, A. +2 more
We report on an XMM-Newton observation of the supernova remnant (SNR)
X-ray emission from T Tauri stars in the Lupus 3 star-forming region
Gondoin, P.
Aims.In this paper, I present analysis results of an {XMM-Newton} observation of the Lupus 3 region that contains a high proportion of young low mass (M < 0.3 M⊙) T Tauri stars in the Lupus star-forming complex.
Methods: .The detection of X-ray sources in 0.5 to 4.5 keV images of the Lupus 3 core was performed using the standard …
A new symbiotic low mass X-ray binary system: 4U 1954+319
Caraveo, P. A.; de Luca, A.; Götz, D. +4 more
Aims.4U 1954+319 was discovered 25 years ago, but only recently has a clear picture of its nature begun to emerge. We present for the first time a broad-band spectrum of the source and a detailed timing study using more than one year of monitoring data.
Methods: .The timing and spectral analysis was done using publicly available Swift, INTEGRA…
The optical to γ-ray emission of the Crab pulsar: a multicomponent model
Cusumano, G.; Campana, R.; Mineo, T. +1 more
We present a multicomponent model to explain the features of the pulsed emission and spectrum of the Crab Pulsar, on the basis of X and γ-ray observations obtained with BeppoSAX, INTEGRAL and CGRO. This model explains the evolution of the pulse shape and of the phase-resolved spectra, ranging from the optical/UV to the GeV energy band, on the assu…
Estimated IR and phosphorescence emission fluxes for specific polycyclic aromatic hydrocarbons in the Red Rectangle
Joblin, C.; Toublanc, D.; Mulas, G. +1 more
Following tentative identification of the blue luminescence in the
The GLE on Oct. 28, 2003 - radio diagnostics of relativistic electron and proton injection
Mann, G.; Aurass, H.; Warmuth, A. +1 more
Timing discrepancies between signatures of accelerated particles at the sun and the arrival times of the particles at near-earth detectors are a matter of fundamental interest for space-weather applications. The solar injection times of various components of energetic particles were derived by Klassen et al. (2005, JGR, 110, A09S04) for the Octobe…
The globular cluster mass/low mass X-ray binary correlation: implications for kick velocity distributions from supernovae
Maccarone, T. J.; Kundu, A.; Zepf, S. E. +1 more
Optical and X-ray studies of six nearby galaxies show that the probability a globular cluster will be an X-ray source is consistent with being linearly proportional to its mass. We show that this result is consistent with some recent estimates of the velocity kick distributions for isolated radio pulsars - those which are the sum of two Maxwellian…
Two-phase X-ray burst from GX 3+1 observed by INTEGRAL
Frontera, F.; Lund, N.; in't Zand, J. J. M. +6 more
INTEGRAL detected on August 31, 2004, an unusual thermonuclear X-ray burst from the low-mass X-ray binary GX 3+1. Its duration was 30 min, which is between the normal burst durations for this source (⪉10 s) and the superburst observed in 1998 (several hours). We see emission up to 30 keV energy during the first few seconds of the burst where the b…