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High- and low-frequency quasi-periodic oscillations in the X-ray light curves of the black hole transient H1743−322
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Homan, J., Miller, J. M., Wijnands, R., van der Klis, M., Belloni, T., Steeghs, D. and Lewin, W. H. G. (2005) High- and low-frequency quasi-periodic oscillations in the X-ray light curves of the black hole transient H1743−322. The Astrophysical Journal, Vol.623 (No.1). pp. 383-391. doi:10.1086/424994 ISSN 0004-637X.
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Official URL: http://dx.doi.org/10.1086/424994
Abstract
We present a variability study of the black hole candidate and X-ray transient H1743-322 during its 2003-2004 outburst. We analyzed five Rossi X-Ray Timing Explorer observations that were performed as part of a multiwavelength campaign, as well as six observations from the early rise of the outburst. The source was observed in several black hole states and showed various types of X-ray variability, including high-frequency quasi-periodic oscillations (QPOs) at 240 and 160 Hz (i.e., with a 3 : 2 frequency ratio), several types of low-frequency QPOs, and strong variations on a timescale of a few hundred seconds. The discovery of high-frequency QPOs in H1743-322 supports predictions that these QPOs should be more easily observed in high inclination systems. In one of our observations a transition in count rate and color occurred, during which we were able to follow the smooth evolution of the low-frequency QPOs from type B to type A. We classify the X-ray observations and QPOs and briefly discuss the QPOs in terms of recently proposed models.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | X-ray bursts, Black holes (Astronomy) | ||||
Journal or Publication Title: | The Astrophysical Journal | ||||
Publisher: | Institute of Physics Publishing, Inc. | ||||
ISSN: | 0004-637X | ||||
Official Date: | 2005 | ||||
Dates: |
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Volume: | Vol.623 | ||||
Number: | No.1 | ||||
Page Range: | pp. 383-391 | ||||
DOI: | 10.1086/424994 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Open Access (Creative Commons) | ||||
Funder: | United States. National Aeronautics and Space Administration (NASA), National Science Foundation (U.S.) (NSF), Italy. Ministero dell'istruzione, dell'università e della ricerca (MIUR), Smithsonian Astrophysical Observatory | ||||
Grant number: | 2002027145 (MIUR) |
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