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The rms-flux relation of Cyg X-2 in the horizontal branch
Li ZB(李志兵); Lei YJ(雷亚娟); Qu JL(屈进禄); Zhang S(张澍); Song LM(宋黎明); Li, ZB; Lei, YJ; Qu, JL; Zhang, S; Song, LM
2010
发表期刊SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY ; SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
卷号53期号:1页码:#REF!
文章类型Article
摘要

We have investigated the relation between the root mean square (rms) variability and the X-ray flux (rms-flux relation) of the Z source Cyg X-2, and as well the energy dependence based on the Rossi X-ray Timing Explorer (RXTE) observations. We currently focus on the horizontal branch (HB), due to the negative correlation in flux of the soft and the hard X-rays. The rms-flux correlation has energy dependence as follows: positive at hard X-rays (above 10 keV) but negative at soft X-rays (below 10 keV). This provides a feature different from the previous one, and may be suggestive of different origins of X-rays below and above 10 keV. Nevertheless, the overall spectrum can be well fitted with a model consisting of a blackbody and Comptonization components, but the fitting results do not reveal any features around 10 keV that could account for such a change in the rms-flux relation.

关键词Accretion, Accretion Disk Binaries: Close Stars: Individual (Cygnus X-2) X-rays: Binaries
学科领域Physics
DOI10.1007/s11433-010-0007-3
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000280291800019
引用统计
被引频次:2[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/311005/226043
专题中国科学院高能物理研究所
推荐引用方式
GB/T 7714
Li ZB,Lei YJ,Qu JL,et al. The rms-flux relation of Cyg X-2 in the horizontal branch[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY, SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2010,53(1):#REF!.
APA Li ZB.,Lei YJ.,Qu JL.,Zhang S.,Song LM.,...&Song, LM.(2010).The rms-flux relation of Cyg X-2 in the horizontal branch.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,53(1),#REF!.
MLA Li ZB,et al."The rms-flux relation of Cyg X-2 in the horizontal branch".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 53.1(2010):#REF!.
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