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A statistical study on the low-frequency quasi-periodic oscillation amplitude spectrum and amplitude in GRS 1915+105
Yan, SP; Ding, GQ; Wang, N; Qu, JL; Song, LM; 屈进禄;宋黎明;
2013
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号434期号:1页码:59-68
摘要A statistical study was made on both the energy dependence of the low-frequency quasi-periodic oscillation (QPO) amplitude (LFQPO amplitude spectrum) and the LFQPO amplitude from all the RXTE observations of GRS 1915+105. Based on the two-branch correlation of the LFQPO frequency and the hardness ratio, the observations that were suitable for evaluating the LFQPO amplitude spectrum were divided into two groups. According to a comparison between the radio and X-ray emissions, we deduced that the jets during the two groups of observations are very different. A negative correlation between the LFQPO frequency and the radio flux was found for one group. The LFQPO amplitude spectrum was fitted by a power law with an exponential cutoff in order to describe it quantitatively. It reveals that as the LFQPO frequency increases, the power law hardens. Furthermore, the cutoff energy first decreases, and then smoothly levels off. The fit also shows that the LFQPO amplitude spectra of the two groups are essentially the same, suggesting that the LFQPO does not originate from the jet. The LFQPO amplitude spectra are hard, indicating a possible origin of the LFQPO in the corona. As the LFQPO frequency increases, the LFQPO amplitude first increases and then decreases. The effects of the low-pass filter and the jet on the LFQPO amplitude are discussed.
关键词accretion, accretion discs black hole physics X-rays: binaries X-rays: individual: GRS 1915+105
学科领域Astronomy & Astrophysics
DOI10.1093/mnras/stt968
收录类别SCI
WOS记录号WOS:000323636800005
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被引频次:11[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223810
专题粒子天体物理中心
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Yan, SP,Ding, GQ,Wang, N,et al. A statistical study on the low-frequency quasi-periodic oscillation amplitude spectrum and amplitude in GRS 1915+105[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,434(1):59-68.
APA Yan, SP,Ding, GQ,Wang, N,Qu, JL,Song, LM,&屈进禄;宋黎明;.(2013).A statistical study on the low-frequency quasi-periodic oscillation amplitude spectrum and amplitude in GRS 1915+105.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,434(1),59-68.
MLA Yan, SP,et al."A statistical study on the low-frequency quasi-periodic oscillation amplitude spectrum and amplitude in GRS 1915+105".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 434.1(2013):59-68.
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