X-ray variability of active galactic nuclei and the flare model

Details X-ray variability of active galactic nuclei and the flare model X-ray variability of active galactic nuclei and the flare model

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006adspr..38.1398g&link_type=abstract

Advances in Space Research, Volume 38, Issue 7, p. 1398-1402.

Computer Science

Scientific paper

Short-term variability of X-ray spectra has been reported for several Active Galactic Nuclei. Significant X-ray flux variations are observed within time scales down to 104 105 s. We discuss short variability time scales in the framework of the X-ray flare model, which assumes the release of a large hard X-ray flux above a small portion of the accretion disk. The resulting observed X-ray spectrum is composed of the primary radiation as well as a reprocessed/Compton reflection component that we model performing numerical radiative transfer simulations. We conduct Monte-Carlo simulations of large flare distributions across the disk including relativistic corrections of the observed radiation and discuss general implications on AGN spectra and their variability.

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