Energy Dependence of QPO in Black Hole Accretion Disks

Details Energy Dependence of QPO in Black Hole Accretion Disks Energy Dependence of QPO in Black Hole Accretion Disks

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999head....4.2805l&link_type=abstract

American Astronomical Society, HEAD meeting #4, #28.05; Bulletin of the American Astronomical Society, Vol. 31, p.731

Astronomy and Astrophysics

Astronomy

2

Scientific paper

We investigate the effect of a hot Comptonizing corona on the energy dependence of QPO fractional amplitudes in black hole accretion disk systems; both semi-analytical solutions and Monte Carlo simulations are presented. In particular, we model the relative Comptonization of inner-disk and outer-disk photons in both slab and spherical coronal geometries with a radial temperature gradient. The results of our modeling are applied to the high-frequency QPO in the galactic microquasars, GRS 1915+105 and GRO J1655-40, in which the QPO fractional amplitudes strongly increase with increasing mean photon energy. We consider the identification of these particular QPO as diskoseismic oscillations.

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