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Power spectra from spotted accretion discs

Published online by Cambridge University Press:  01 August 2006

Tomáš Pecháček ,
Michal Dovčiak  and
Vladimír Karas
Tomáš Pecháček
Affiliation:
Charles University, Faculty of Mathematics and Physics, Prague, Czech Republic email: pechacek_t@seznam.cz Astronomical Institute, Academy of Sciences, Prague, Czech Republic
Michal Dovčiak
Affiliation:
Astronomical Institute, Academy of Sciences, Prague, Czech Republic
Vladimír Karas
Affiliation:
Astronomical Institute, Academy of Sciences, Prague, Czech Republic
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Abstract

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Some aspects of power-spectral densities (PSD) of active galactic nuclei are similar to those of galactic black hole X-ray binary systems (McHardy et al. 2005). The signal originates near a black hole and its modulation by general-relativistic effects should be taken into account (Życki & Nedźwiecki 2005). We modified the previous calculations of these effects, assuming a model of spots which occur on the disc surface and decay with a certain lifetime.

Keywords

Accretion disksblack hole physicsmethods: analyticalX-rays: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S238: Black Holes from Stars to Galaxies – Across the Range of Masses , August 2006 , pp. 425 - 426
Copyright
Copyright © International Astronomical Union 2007

References

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