A statistical study on the low-frequency quasi-periodic oscillation amplitude spectrum and amplitude in GRS 1915+105

	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;
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2013
卷号	434 期号:1 页码:59-68
关键词	accretion black hole physics X-rays: binaries X-rays: individual: GRS 1915+105 accretion discs
英文摘要	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.
学科主题	Astronomy & Astrophysics
收录类别	SCI
WOS记录号	WOS:000323636800005
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/223810]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	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.