Ronald E. Taam
Dept. Astronomy Astroph., Northwestern Univ. (Evanston, Illinois, Etats-Unis d'Amérique)
Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris
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| « The faint X-ray source population in the Galactic center » |
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Ronald E. Taam |
| Recent deep Chandra surveys of the Galactic center region have revealed the existence of a faint X-ray source population. The nature of this population is not clear, but it is likely that several types of stellar objects are involved. Among stellar sources, binary systems with white dwarf and neutron star accreting components are likely to significantly contribute to this population. In particular, magnetic cataclysmic variables and stellar wind fed X-ray binaries with low to intermediate mass donors may contribute to the population characterized by a hard spectrum. On the other hand, Roche lobe overflow fed X-ray binary systems with low mass donors may contribute to the soft X-ray population. The latter group of sources contribute during their quiescent state in those systems which undergo transient X-ray outbursts. We review the formation and evolution of these systems using binary evolution population synthesis techniques and discuss how the observations provide constraints on the nature of the faint X-ray source population in the Galactic center region. |
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vendredi 10 mars 2006 - 11:00 Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |