LONG-TERM X-RAY MONITORING OF LS I+61 degrees 303: ANALYSIS OF SPECTRAL VARIABILITY AND FLARES
Li J(李剑); Zhang S(张澍); Chen YP(陈玉鹏); Wang JM(王建民); Li, J; Torres, DF; Zhang, S; Chen, YP; Hadasch, D; Ray, PS; Kretschmar, P; Rea, N; Wang, JM
刊名ASTROPHYSICAL JOURNAL
2011
卷号733期号:2页码:89
关键词X-rays: binaries X-rays: individual (LS I+61 degrees 303)
学科分类Astronomy & Astrophysics
DOI10.1088/0004-637X/733/2/89
通讯作者[Li, Jian ; Zhang, Shu ; Chen, Yupeng ; Wang, Jianmin] Inst High Energy Phys, Lab Particle Astrophys, Beijing 100049, Peoples R China ; [Torres, Diego F.] ICREA, Barcelona 08010, Spain ; [Torres, Diego F. ; Hadasch, Daniela ; Rea, Nanda] Inst Ciencies Espai IEEC CSIC, Barcelona 08193, Spain ; [Ray, Paul S.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA ; [Kretschmar, Peter] ESA European Space Astron Ctr, Madrid, Spain ; [Wang, Jianmin] Chinese Acad Sci, TPCSF, Beijing 100049, Peoples R China
文章类型Article
英文摘要We report on the full analysis of a Rossi X-ray Timing Explorer Proportional Counter Array monitoring of the gamma-ray binary system LS I +61 degrees 303. The data set covers 42 contiguous cycles of the system orbital motion. Analyzing this X-ray monitoring data set, the largest to date for this source, we report on the variability of the orbital profile and the spectral distribution, and provide strong evidence for an anti-correlation between flux and spectral index (the higher the flux, the harder the spectral index). Furthermore, we present the analysis of two newly discovered kilosecond-timescale flares, which present significant variability also on shorter timescales and tend to occur at orbital phases between 0.6 and 0.9. However, a detailed timing analysis of the flares does not show any coherent or quasi-coherent (QPO) structure in their power spectra. We also investigated the possible appearance of the radio super-orbital modulation at X-ray energies, but we could not unambiguously detect such modulation in the system flux history nor in the evolution of its orbital modulation fraction.
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:000290676100016
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被引频次:20[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/311005/240386
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
作者单位中国科学院高能物理研究所
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Li J,Zhang S,Chen YP,et al. LONG-TERM X-RAY MONITORING OF LS I+61 degrees 303: ANALYSIS OF SPECTRAL VARIABILITY AND FLARES[J]. ASTROPHYSICAL JOURNAL,2011,733(2):89.
APA 李剑.,张澍.,陈玉鹏.,王建民.,Li, J.,...&Wang, JM.(2011).LONG-TERM X-RAY MONITORING OF LS I+61 degrees 303: ANALYSIS OF SPECTRAL VARIABILITY AND FLARES.ASTROPHYSICAL JOURNAL,733(2),89.
MLA 李剑,et al."LONG-TERM X-RAY MONITORING OF LS I+61 degrees 303: ANALYSIS OF SPECTRAL VARIABILITY AND FLARES".ASTROPHYSICAL JOURNAL 733.2(2011):89.
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