Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mnras.386.1872r&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 386, Issue 4, pp. 1872-1880.
Astronomy and Astrophysics
Astronomy
12
Accretion, Accretion Discs, Line: Profiles, Radiative Transfer, Scattering, Galaxies: Active
Scientific paper
We present a full set of model atmosphere equations for the accretion disc around a supermassive black hole irradiated by a hard X-ray lamp of power-law spectral distribution. Model equations allow for multiple Compton scattering of radiation on free electrons, and for large relative photon-electron energy exchange at the time of scattering. We present spectra in specific intensities integrated over the disc surface. Theoretical outgoing intensity spectra show soft X-ray excess below 1 keV, and distinct Kα and Kβ fluorescent lines of iron. We demonstrate the existence of the Compton Shoulder and claim that it can contribute to the asymmetry and equivalent widths of some observed Fe Kα lines in active galactic nuclei. Our models exhibit the effect of limb-brightening in reflected X-rays.
Madej Jerzy
Rozanska Agata
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