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All-Moscow Seminar of Astrophysicists
(ASA)
The seminar is supported by the grant of Federal Programm "Integration"annotation of talk
Andrei Gruzinov (Inst. of Adv. Studies, Princeton, USA Collisionless Halos Around Black Holes
When a black hole accretes slowly, the radiative cooling of the infalling
gas is weak and the accretion disk does not form. A hot collisionless
quasi-spherical halo is formed instead. The properties of such halos are
discussed. The rate of accretion, the radiative efficiency, and the
temperature and density near the hole are evaluated.