On the role of relativistic effects in X-ray variability of AGN

Details On the role of relativistic effects in X-ray variability of AGN On the role of relativistic effects in X-ray variability of AGN

2006-12-20

arxiv.org/abs/astro-ph/0612597v1

Astronomy and Astrophysics

Astrophysics

Conference proceedings to appear in "The Central Engine of Active Galactic Nuclei", ed. L. C. Ho and J.-M. Wang (San Francisco

Scientific paper

Special relativistic and strong gravity effects are clearly seen in X-ray energy spectra from AGN. Most important here are the broad profiles of the Fe Kalpha line observed in a large fraction of sources. These indicate that X-ray generation and reprocessing takes place very close to the central black hole. Here we explore consequences of such effects on X-ray variability. We perform computations of a possible quasi-periodic signal from a Keplerian motion of primary X-ray source. We also study in some details the light-bending model of variability of the X-ray reprocessed component, extending previous work on the subject.

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