Accretion Shocks As Diagnostics Of Black Hole Physics

Details Accretion Shocks As Diagnostics Of Black Hole Physics Accretion Shocks As Diagnostics Of Black Hole Physics

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.5307c&link_type=abstract

American Astronomical Society, AAS Meeting #212, #53.07; Bulletin of the American Astronomical Society, Vol. 40, p.250

Astronomy and Astrophysics

Astronomy

Scientific paper

Accretion flows around black holes very often have centrifugal pressure dominated standing or oscillating shock waves. In steady shocks, they form at the locations where the Rankine-Hugoniot relations are satisfied. When the relations are not satisfied, the shocks become oscillatory. The cooling time scale matches with the infall time scale also. The post-shock region is the site where the Comptonization of the low energy photons take place and high energy X-rays are generated. The oscillating shocks produce oscillating X-ray intensity giving rise to the so-called Quasi-Periodic Oscillations (QPOs). We show how this understanding of the accretion shocks allow us to discuss in details the dynamical behaviour of the flow around a black hole, especially in the case of outburst sources.

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