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Period doubling and non-linear resonance in the black hole candidate IGR J17091-3624?

Journal article
Authors P. Rebusco
P. Moskalik
W. Kluźniak
Marek A Abramowicz
Published in Astronomy and Astrophysics
Volume 540
ISSN 00046361
Publication year 2012
Published at Department of Physics (GU)
Language en
Keywords Accretion, accretion disks, Asteroseismology, Black hole physics, X-rays: binaries
Subject categories Physical Sciences


The two high frequency quasi periodic oscillations (HFQPOs) recently reported in the black hole candidate IGR J17091-3624 are in a 5:2 frequency ratio (164 Hz to 66 Hz). This ratio is strongly suggestive of period doubling and nonlinear resonance analogous to phenomena known in RV Tauri-type pulsating stars (and recently discovered also in oscillations of RR Lyrae-type and of BL Herculis-type variables). An interpretation of the frequency ratio in terms of nonlinear interactions and a comparison with the HFQPOs reported in GRS 1915+105 may imply a mass of about six solar masses for the black hole in IGR J17091-3624. © 2012 ESO.

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