中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Evolution of hard X-ray spectra along the orbital phase in circinus X-1

文献类型:期刊论文

作者Ding, GQ; Zhang SN(张双南); Li TB(李惕碚); Qu JL(屈进禄); Zhang, SN; Li, TP; Qu, JL
刊名ASTROPHYSICAL JOURNAL
出版日期2006
卷号645期号:1页码:576-588
关键词binaries : general stars : individual (Circinus X-1) X-rays : binaries X-rays : general X-rays : individual (Circinus X-1)
通讯作者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, Key Lab Particle Astrophys, Beijing 100049, Peoples R China
英文摘要Using the data from the Proportional Counter Array and the High-Energy X-Ray Timing Experiment on board the Rossi X-Ray Timing Explorer satellite, we investigate the evolution of the 3-200 keV spectrum of the peculiar low-mass X-ray binary Circinus X-1 along its orbital phase. A power-law hard component, dominating above similar to 30 keVas well as contributing between 0.9% and 3.5% of the total flux, and the iron emission line are detected in the spectrum. It is found that the derived photon index (Gamma) of the power-law hard component and the characteristics of the iron emission line are modulated by the orbital phase: the hardest hard tail, the lowest line energy, and the largest line width of the iron emission line are detected at the periastron. However, the softest hard tail, the highest line energy, and the lowest line width of the iron emission line are detected after the apastron. At the periastron the source evolves along a complete track in the color-color diagram. These behaviors of orbital modulation are discussed. A possible origin of the power-law hard component is also discussed.
学科主题Astronomy & Astrophysics
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
原文出处SCI
语种英语
WOS记录号WOS:000238832900047
源URL[http://ir.ihep.ac.cn/handle/311005/238006]  
专题高能物理研究所_粒子天体物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714
Ding, GQ,Zhang SN,Li TB,et al. Evolution of hard X-ray spectra along the orbital phase in circinus X-1[J]. ASTROPHYSICAL JOURNAL,2006,645(1):576-588.
APA Ding, GQ.,张双南.,李惕碚.,屈进禄.,Zhang, SN.,...&Qu, JL.(2006).Evolution of hard X-ray spectra along the orbital phase in circinus X-1.ASTROPHYSICAL JOURNAL,645(1),576-588.
MLA Ding, GQ,et al."Evolution of hard X-ray spectra along the orbital phase in circinus X-1".ASTROPHYSICAL JOURNAL 645.1(2006):576-588.

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来源:高能物理研究所

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