The variability classes in IGR J17091-3624 during the 2011 outburst

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	The variability classes in IGR J17091-3624 during the 2011 outburst
	Zhang, Z.1,2 ; Qu, J. L.1; Gao, H. Q.1,2; Zhang, S.1; Bu, Q. C.3; Ge, M. Y.1; Chen, L.3 ; Li, Z. B.4
刊名	ASTRONOMY & ASTROPHYSICS
	2014-09-01
卷号	569 页码:A33
关键词	stars: individual: IGR J17091-3624 X-rays: binaries accretion, accretion disks black hole physics
英文摘要	Aims. Based on the Rossi X-ray Timing Explorer (RXTE) data, we studied the typical variability classes in IGR J17091-3624 during the 2011 outburst and attempted to understand the physical mechanism that produces the highly structured variability. Methods. Using the rate-resolved spectroscopy, we produced color-color diagrams (CCDs), hardness-intensity diagrams (HIDs), and rate-resolved energy spectra for each class. The time lags were calculated by means of the cross-power spectrum (CPS) analysis. Results. Our study provides a comprehensive understanding of the nu, rho, alpha, beta/lambda, mu and gamma classes during this outburst. The source shows up with different track directions in the CCD loops and different types of the lag at similar to 1-6 s which are class dependent. It is notable that each variability class showing hard lags presents an anti-clockwise loop in the CCD, while each variability class showing soft lags presents a clockwise loop in the CCD. We discuss these observational results with the current models proposed for this type of system. The observed hardness ratio shows an increasing trend toward the high disk temperature for different classes, which can be regarded as evidence for thermal-viscous instability.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	BLACK-HOLE CANDIDATE ; QUASI-PERIODIC OSCILLATIONS ; X-RAY BINARIES ; GRS 1915+105 ; EVOLUTION ; MODEL
收录类别	SCI
语种	英语
WOS记录号	WOS:000343092100031
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/582]
专题	高能天体物理研究团组新疆天文台_射电天文研究室
作者单位	1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 4.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Z.,Qu, J. L.,Gao, H. Q.,et al. The variability classes in IGR J17091-3624 during the 2011 outburst[J]. ASTRONOMY & ASTROPHYSICS,2014,569:A33.
APA	Zhang, Z..,Qu, J. L..,Gao, H. Q..,Zhang, S..,Bu, Q. C..,...&Li, Z. B..(2014).The variability classes in IGR J17091-3624 during the 2011 outburst.ASTRONOMY & ASTROPHYSICS,569,A33.
MLA	Zhang, Z.,et al."The variability classes in IGR J17091-3624 during the 2011 outburst".ASTRONOMY & ASTROPHYSICS 569(2014):A33.