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On the origin of the low-frequency QPO in GRS 1915+105 ρ state

Published online by Cambridge University Press:  20 March 2013

Shu-Ping Yan ,
Na Wang  and
Guo-Qiang Ding
Shu-Ping Yan
Affiliation:
Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150, Science 1-Street, Urumqi, Xinjiang 830011, China email: yanshup@xao.ac.cn, na.wang@xao.ac.cn, dinggq@xao.ac.cn University of Chinese Academy of Sciences, 19A Yuquan road, Beijing 100049, China
Na Wang
Affiliation:
Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150, Science 1-Street, Urumqi, Xinjiang 830011, China email: yanshup@xao.ac.cn, na.wang@xao.ac.cn, dinggq@xao.ac.cn
Guo-Qiang Ding
Affiliation:
Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150, Science 1-Street, Urumqi, Xinjiang 830011, China email: yanshup@xao.ac.cn, na.wang@xao.ac.cn, dinggq@xao.ac.cn
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Abstract

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We performed a phase-resolved timing analysis of GRS 1915+105 in its ρ state and identify detailed ρ cycle evolution of frequency, amplitude and coherence of the low-frequency quasi-periodic oscillation (LFQPO). We combined our timing results with the spectral study by Neilsen et al. (2011) to do an elaborate contrast analysis. The results are naturally explained by tying the LFQPO to the corona.

Keywords

accretionaccretion disksoscillationsGRS 1915+105
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S291: Neutron Stars and Pulsars: Challenges and Opportunities after 80 years , August 2012 , pp. 565 - 567
Copyright
Copyright © International Astronomical Union 2013

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