Power spectra from `spotted' accretion discs

Details Power spectra from `spotted' accretion discs Power spectra from `spotted' accretion discs

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006an....327..957p&link_type=abstract

Astronomische Nachrichten, Vol.327, Issue 10, p.957

Physics

4

Accretion Disks, Black Hole Physics, Methods: Analytical, X-Rays: General

Scientific paper

We are carrying out a project to calculate power spectra of variability, assuming a model of a `spotted' accretion disc near a black hole. We consider relativistic effects that change photon energy and produce light-bending and time-delays acting on the X-ray signal received by an observer. We assume that the life-time and the intrinsic emissivity of individual flaring events are described in terms of a simple stochastic process. This allows us to give approximate analytical formulae and compare them with numerical computations.

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