Journal Article

High-frequency quasi-periodic oscillations in black hole binaries

T. M. Belloni, A. Sanna and M. Méndez

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 426, issue 3, pages 1701-1709
Published in print November 2012 | ISSN: 0035-8711
Published online November 2012 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2012.21634.x
High-frequency quasi-periodic oscillations in black hole binaries

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Abstract

We present the results of the analysis of a large data base of X-ray observations of 22 galactic black hole transients with the Rossi X-Ray Timing Explorer throughout its operative life for a total exposure time of ∼12 ms. We excluded persistent systems and the peculiar source GRS 1915+105, as well as the most recently discovered sources. The semi-automatic homogeneous analysis was aimed at the detection of high-frequency (100–1000 Hz) quasi-periodic oscillations (QPO), of which several cases were previously reported in the literature. After taking into account the number of independent trials, we obtained 11 detections from two sources only: XTE J1550−564 and GRO J1655−40. For the former, the detected frequencies are clustered around 180  and 280 Hz, as previously found. For the latter, the previously reported dichotomy 300–450 Hz is found to be less sharp. We discuss our results in comparison with kHz QPO in neutron-star X-ray binaries and the prospects for future timing X-ray missions.

Keywords: accretion, accretion discs; black hole physics; relativistic processes; X-rays: binaries

Journal Article.  5648 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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