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Дата изменения: Thu May 10 17:16:38 2001
Дата индексирования: Tue Oct 2 12:13:14 2012
Кодировка:
Поисковые слова: mercury surface
Seminars

All-Moscow Seminar of Astrophysicists
(ASA)

annotation of talk
S.N.Fabrika (SAO)
X-ray sources in galaxies: active nuclei, primodal black holes or microquasars


The last findings in observations of point-like X-ray sources in galaxies are reported. Observations on the ROSAT, ASCA and, especially CHANDRA make clear that AGNs are not always the most bright X-ray sources in galaxies. A new class of objects has been discovered - the Ultraluminous X-ray (ULX) sources, which could be as black holes of intermediate mass (100-1000 suns), being captured by galaxies and spiralling in because of dynamical friction, or microquasars (SS433-like stars), being orientated "face-on". In the last case we have a unique possibility of direct observational study of the jet-formation process in supercritical accretion disk.