X-ray variability patterns and geometry of black hole binaries

Details X-ray variability patterns and geometry of black hole binaries X-ray variability patterns and geometry of black hole binaries

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003head....7.2902z&link_type=abstract

American Astronomical Society, HEAD meeting #7, #29.02; Bulletin of the American Astronomical Society, Vol. 35, p.647

Astronomy and Astrophysics

Astronomy

Scientific paper

I will discuss some long-term variability patterns of black-hole binaries. They involve correlations between flux, hardness, rms variability, Compton reflection and the level of radio flux. The correlations have a number of implications for the radiative processes and geometry of accretion flows. A preferred scenario for the hard/low state contains of Compton upscattering of soft photons from an outer disk in a hot inner flow. In the soft/high state, Compton scattering appears to be by a hybrid, thermal/non-thermal electron distribution in variable flares above the surface of a cold disk.

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