Accretion disk atmoshperes: soft X-ray excess and Compton shoulder

Details Accretion disk atmoshperes: soft X-ray excess and Compton shoulder Accretion disk atmoshperes: soft X-ray excess and Compton shoulder

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ragt.meet..201r&link_type=abstract

Proceedings of RAGtime 8/9: Workshops on black holes and neutron stars, 15-19/19-21 September, 2006/2007, Hradec nad Moravicí, O

Computer Science

1

Accretion Disks, Galaxies: Active, Radiative Transfer, Scattering, Line: Profiles

Scientific paper

We have developed the set of model atmosphere equations, corresponding to an accretion disk around a supermassive black hole irradiated by hard X-ray lamp with power-law spectrum. Model equations allow for multiple Compton scattering of radiation on free electrons, and for large relative photon-electron energy exchange. We present spectra of specific intensities integrated over the disk radii. Outgoing intensity spectra show soft X-ray excess below 1 keV, and distinct K_{α} and K_{β} fluorescent lines of low ionized iron. We demonstrate the existence of the Compton shoulder on the red-wing side of K_{α} line. Our models exhibit very strong and steep temperature increase in the outermost layer of irradiated disk atmospheres which cause the effect of limb-brightening in reflected X-rays.

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