Résumé / Abstract Seminaire_IAP
« Probing Black Hole Environments with High Resolution X-ray Spectroscopy »

Julia C. Lee
Dept. Astronomy, Harvard Univ. (Cambridge, Massachusetts, Etats-Unis d'Amérique)

Black holes and accretion onto black holes are associated with a wide range of astrophysical phenomena. High resolution X-ray spectroscopy provides a powerful new tool for probing the physics of the black hole environment. X-ray spectral signatures reveal the dynamics and the ionization state of plasma in and around the accretion disk, and the properties of winds and flows. I will discuss highlights from Chandra observations of several well known stellar and supermassive black hole systems, the microquasar GRS 1915+105, the Seyfert 1 galaxy MCG-6-30-15 and the Seyfert 2 galaxy IRAS 18325-5926 to illustrate their similarities, despite the phenomenological differences. X-ray spectra of these systems allow us to probe the ionized winds, GR effects from close to the black hole, and nature of the intervening material, e.g. in dust.
vendredi 22 avril 2005 - 11:00
Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris
Page web du séminaire / Seminar's webpage