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Shot cutoff timescales in different spectral states of Cygnus X-1
Feng, H; Zhang SN(张双南); Li TB(李惕碚); Zhang, SN; Li, TP
刊名ASTROPHYSICAL JOURNAL
2004
卷号612期号:1页码:L45-L48
关键词accretion, accretion disks black hole physics stars : individual (Cygnus X-1) X-rays : binaries
学科分类Astronomy & Astrophysics
DOI10.1086/424567
通讯作者Tsing Hua Univ, Dept Engn Phys, Beijing 100084, Peoples R China ; Tsing Hua Univ, Ctr Astrophys, Beijing 100084, Peoples R China ; Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China ; Univ Alabama, Dept Phys, Huntsville, AL 35899 USA ; Chinese Acad Sci, Inst High Energy Phys, Lab Particle Astrophys, Beijing 100039, Peoples R China ; NASA, Space Sci Lab, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA
文章类型Article
英文摘要We investigate the shot cutoff timescale evolutions during different spectral states in the black hole binary Cygnus X-1 with the recently proposed w spectral analysis technique. For low-energy shots, their cutoff timescale decreases from the low state to the intermediate state and to the high state monotonically. However, in the high-energy range, where shots are believed to be reprocessed in the hot corona, timescales are almost the same for different spectral states. A linear correlation is found between the energy spectrum photon index and the shot cutoff timescale at low energies. Both narrow and broad iron Kalpha lines are distinguished from timing analysis, providing dynamical evidence that broad and narrow iron lines originate, respectively, at small and large radii of the accretion disk. Possible mechanisms for state transitions and accretion flow geometry in accreting stellar mass black holes are discussed.
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:000223634600012
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240276
专题院士_期刊论文
作者单位中国科学院高能物理研究所
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Feng, H,Zhang SN,Li TB,et al. Shot cutoff timescales in different spectral states of Cygnus X-1[J]. ASTROPHYSICAL JOURNAL,2004,612(1):L45-L48.
APA Feng, H,张双南,李惕碚,Zhang, SN,&Li, TP.(2004).Shot cutoff timescales in different spectral states of Cygnus X-1.ASTROPHYSICAL JOURNAL,612(1),L45-L48.
MLA Feng, H,et al."Shot cutoff timescales in different spectral states of Cygnus X-1".ASTROPHYSICAL JOURNAL 612.1(2004):L45-L48.
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