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Interpreting black hole QPOs

Conference contribution
Authors Marek A Abramowicz
Wlodzimierz Kluzniak
Published in AIP Conference Proceedings
Volume 714
Pages 21-28
ISSN 0094-243X
Publication year 2004
Published at Department of Physics (GU)
Pages 21-28
Language en
Subject categories Physical Sciences, Astronomy, Astrophysics and Cosmology

Abstract

n all the microquasars with two hHz QPOs, the ratio of the frequencies is 3:2, supporting our suggestion that a non-linear resonance between two modes of oscillation in the accretion disk plays a role in exciting the observed modulations of the X-ray flux. We discuss the evidence in favor of this interpretation, and we relate the black hole spin to the frequencies expected for various types of resonances that may occur in nearly Keplerian disks in strong gravity. For those microquasars where the mass of the central X-ray source is known, the black hole spin can be deduced from a comparison of the observed and expected frequencies.

Page Manager: Webmaster|Last update: 9/11/2012
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