Julia C. Lee
Dept. Astronomy, Harvard Univ. (Cambridge, Massachusetts, Etats-Unis d'Amérique)
Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris
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| « Probing Black Hole Environments with High Resolution X-ray Spectroscopy » |
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Julia C. Lee |
| 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. |
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vendredi 22 avril 2005 - 11:00 Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |