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Models of the iron K_alpha fluorescence line and the Compton shoulder in irradiated accretion disk spectra
- Publication Year :
- 2008
-
Abstract
- We present a full set of model atmosphere equations for the accretion disk around a supermassive black hole irradiated by 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 disk surface. Theoretical outgoing intensity spectra show soft X-ray excess below 1 keV, and distinct K_alpha and K_beta 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 K_alpha lines in AGN. Our models exhibit the effect of limb-brightening in reflected X-rays.<br />Comment: 10 pages, 8 Postscript figures, accepted to MNRAS
- Subjects :
- Astrophysics
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.0804.1232
- Document Type :
- Working Paper