X-ray reflected spectra from accretion disk models. I. Constant density atmospheres - Astrophysics > High Energy Astrophysical Phenomena

X-ray reflected spectra from accretion disk models. I. Constant density atmospheres - Astrophysics > High Energy Astrophysical Phenomena - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: We present new models for illuminated accretion disks, their structure andreprocessed emission. We consider the effects of incident X-rays on the surfaceof an accretion disk by solving simultaneously the equations of radiativetransfer, energy balance and ionization equilibrium over a large range ofcolumn densities. We assume plane-parallel geometry and azimuthal symmetry,such that each calculation corresponds to a ring at a given distance from thecentral object. Our models include recent and complete atomic data for K-shellprocesses of the iron and oxygen isonuclear sequences. We examine the effect onthe spectrum of fluorescent K$\alpha$ line emission and absorption in theemitted spectrum. We also explore the dependence of the spectrum on thestrength of the incident X-rays and other input parameters, and discuss theimportance of Comptonization on the emitted spectrum.

Autor: Javier Garcia, Timothy Kallman

Fuente: https://arxiv.org/