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Resonant oscillations of accretion flow and KHz QPOS

Journal article
Authors W. Kluzniak
Marek A Abramowicz
Published in Astrophys. Space Sci.
Volume 300
Issue 1-3
Pages 143-148
ISSN 0004-640X
Publication year 2005
Published at Department of Physics (GU)
Pages 143-148
Language en
Subject categories Physical Sciences, Astronomy, Astrophysics and Cosmology


High-frequency quasiperiodic variations (HF QPOs) in the X-ray light curves of black hole X-ray novae can be understood as oscillations of the accretion disk in a nonlinear 3:2 resonance. An m = 0 vertical oscillation near a black hole modulates the X-ray emission through gravitational lensing (light-bending) at the source. Certain oscillations of the accretion disk will also modulate the mass accretion rate, and in neutron-star systems this would lead to nearly periodic variations in brightness of the luminous boundary layer on the stellar surface - the amplitude of the neutron-star HF QPOs would be thus increased relative to the black hole systems.

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