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

doi:10.1051/0004-6361/201323294

IHEP OpenIR > 粒子天体物理中心

	The variability classes in IGR J17091-3624 during the 2011 outburst
	Zhang Z(张镇); Qu JL(屈进禄); Gao HQ(高汉秦); Zhang, Z; Qu, JL; Gao, HQ; Zhang, S; Bu, QC; Ge, MY; Chen, L; Li, ZB; Zhang S(张澍); Ge MY(葛明玉)
	2014
发表期刊	ASTRONOMY & ASTROPHYSICS
卷号	569 页码:A33
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.
关键词	stars: individual: IGR J17091-3624 X-rays: binaries accretion, accretion disks black hole physics
学科领域	Astronomy & Astrophysics
DOI	10.1051/0004-6361/201323294
收录类别	SCI
WOS记录号	WOS:000343092100031
引用统计	被引频次：1[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/311005/224839
专题	粒子天体物理中心
推荐引用方式 GB/T 7714	Zhang Z,Qu JL,Gao HQ,et al. The variability classes in IGR J17091-3624 during the 2011 outburst[J]. ASTRONOMY & ASTROPHYSICS,2014,569:A33.
APA	张镇.,屈进禄.,高汉秦.,Zhang, Z.,Qu, JL.,...&葛明玉.(2014).The variability classes in IGR J17091-3624 during the 2011 outburst.ASTRONOMY & ASTROPHYSICS,569,A33.
MLA	张镇,et al."The variability classes in IGR J17091-3624 during the 2011 outburst".ASTRONOMY & ASTROPHYSICS 569(2014):A33.

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