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)
刊名ASTRONOMY & ASTROPHYSICS
2014
卷号569页码:A33
关键词stars: individual: IGR J17091-3624 X-rays: binaries accretion, accretion disks black hole physics
学科分类Astronomy & Astrophysics
DOI10.1051/0004-6361/201323294
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.
收录类别SCI
WOS记录号WOS:000343092100031
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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
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
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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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