文章基本信息

标题：Theoretical Studies of Timing and Spectral Properties of Quasars to Nano-quasars till a few MeV
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作者：S.K Chakrabarti ; S. Mandal
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2006
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We study the timing and spectral properties of two component accretion flows around black holes which may or may not have jets and outflows. We discuss the origin of quasi-periodic-oscillations (QPOs) as the oscillations of various interfaces, such as the inner edge of the Keplerian disk, shock location, inner shock location as well as due to the periodic cooling of the the subsonic region of the outflow. As far as the spectral properties are concerned, we show that the soft photons emitted by the Keplerian component and the synchrotron radiation from the pre-shock or the post-shock sub-Keplerian component are inverse Comptonized by the thermal and shock-accelerated nonthermal electrons in the post-shock region. The resulting photons can have energy till a few MeV as observed in several black hole candidates. We produce examples of the spectrum for various flow parameters as well as the mass of the black hole.