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Low-frequency coherence break in the soft X-ray state of GRS 1915+105
Ji, JF; Zhang SN(张双南); Qu JL(屈进禄); Li TB(李惕碚); Zhang, SN; Qu, JL; Li, TP
刊名ASTROPHYSICAL JOURNAL
2003
卷号584期号:1页码:L23-L26
关键词accretion, accretion disks stars : individual (GRS 1915+105) X-rays : binaries
学科分类Astronomy & Astrophysics
DOI10.1086/368269
通讯作者Tsing Hua Univ, Dept Engn Phys, Beijing 100084, Peoples R China ; Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China ; Tsing Hua Univ, Ctr Astrophys, Beijing 100084, Peoples R China ; Univ Alabama, Dept Phys, Huntsville, AL 35899 USA ; NASA, George C Marshall Space Flight Ctr, Space Sci Lab, Huntsville, AL 35812 USA ; Chinese Acad Sci, Inst High Energy Phys, Lab Particle Astrophys, Beijing 100039, Peoples R China
文章类型Article
英文摘要We present results from the analysis of X-ray power density spectra and coherence when GRS 1915+105 is in soft states. We use three data sets that belong to mu, phi, and delta classes as found in the work of Belloni et al. We find that the power density spectra appear to be complex, with several features between 0.01 and 10 Hz. The coherence deviates from unity above a characteristic frequency. We discuss our results from different models. The corona size in the sphere-disk model implied by this break frequency is on the order of 10(4) GM/c(2), which is unphysical. Our results are more consistent with the prediction of the model of a planar corona sustained by magnetic flares, in which the characteristic frequency is associated with the longest timescale of an individual flare, which is about 8 s.
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
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语种英语
WOS记录号WOS:000180706100006
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240263
专题院士_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
作者单位中国科学院高能物理研究所
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Ji, JF,Zhang SN,Qu JL,et al. Low-frequency coherence break in the soft X-ray state of GRS 1915+105[J]. ASTROPHYSICAL JOURNAL,2003,584(1):L23-L26.
APA Ji, JF.,张双南.,屈进禄.,李惕碚.,Zhang, SN.,...&Li, TP.(2003).Low-frequency coherence break in the soft X-ray state of GRS 1915+105.ASTROPHYSICAL JOURNAL,584(1),L23-L26.
MLA Ji, JF,et al."Low-frequency coherence break in the soft X-ray state of GRS 1915+105".ASTROPHYSICAL JOURNAL 584.1(2003):L23-L26.
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