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1996A&AS..120C.163C - Astron. Astrophys., Suppl. Ser., 120C, 163-166 (1996/December-3)
Observational signature of the `boundary layer' of galactic and extragalactic black holes.
CHAKRABARTI S.K., TITARCHUK D., KAZANAS L. and EBISAWA K.
Abstract (from CDS):
We present spectral properties of an accretion disk model, in which a Keplerian accretion disk is flanked by a sub-Keplerian halo component terminating at a standing shock. The post-shock region (which may be considered to be the boundary layer of a black hole) reprocesses the soft photons emitted from the Keplerian accretion disk. We show that switching of states (from hard to soft and vice versa) could be accomplished by a change in the accretion rate of the Keplerian disk component. Our consideration, for the first time, resolves a long-standing problem of identifying the illusive `Compton cloud' responsible for the switching of states.
Abstract Copyright: ∼
Journal keyword(s): accretion disks - transonic flows - black hole physics - hydrodynamics - radiation mechanisms: Compton and inverse Compton - radiative transfer - X-rays: general
CDS comments: Special Issue "3rd Compton Symposium"
Simbad objects: 5
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