Xray Reflected Spectra from Accretion Disk Models. I. Constant Density Atmospheres
Abstract
We present new models for illuminated accretion disks, their structure, and reprocessed emission. We consider the effects of incident Xrays on the surface of an accretion disk by simultaneously solving the equations of radiative transfer, energy balance, and ionization equilibrium over a large range of column densities. We assume planeparallel geometry and azimuthal symmetry, such that each calculation corresponds to a ring at a given distance from the central object. Our models include recent and complete atomic data for Kshell processes of the iron and oxygen isonuclear sequences. We examine the effect on the spectrum of fluorescent Kα line emission and absorption in the emitted spectrum. We also explore the dependence of the spectrum on the strength of the incident Xrays and other input parameters, and discuss the importance of Comptonization on the emitted spectrum.
 Publication:

The Astrophysical Journal
 Pub Date:
 August 2010
 DOI:
 10.1088/0004637X/718/2/695
 arXiv:
 arXiv:1006.0485
 Bibcode:
 2010ApJ...718..695G
 Keywords:

 accretion;
 accretion disks;
 atomic processes;
 black hole physics;
 line: formation;
 radiative transfer;
 Xrays: general;
 Astrophysics  High Energy Astrophysical Phenomena;
 Astrophysics  Cosmology and Nongalactic Astrophysics
 EPrint:
 Accepted for publication in ApJ. 34 pages, 10 figures