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SPECTRAL ANALYSIS IN ORBITAL/SUPERORBITAL PHASE SPACE AND HINTS OF SUPERORBITAL VARIABILITY IN THE HARD X-RAYS OF LS I+61 degrees 303
Li, J; Torres, DF; 张澍;Zhang, S
2014
发表期刊ASTROPHYSICAL JOURNAL LETTERS
卷号785期号:1页码:L19
摘要We present an INTEGRAL spectral analysis in the orbital/superorbital phase space of LS I +61 degrees 303. A hard X-ray spectrum with no cutoff is observed at all orbital/superorbital phases. The hard X-ray index is found to be uncorrelated with the radio index (non-simultaneously) measured at the same orbital and superorbital phases. In particular, the absence of an X-ray spectrum softening during periods of negative radio index does not favor a simple interpretation of the radio index variations in terms of a microquasar's changes of state. We uncover hints of superorbital variability in the hard X-ray flux, in phase with the superorbital modulation in soft X-rays. An orbital phase drift of the radio peak flux and index along the superorbital period is observed in the radio data. We explore its influence on a previously reported double-peak structure of a radio orbital light curve, and present it as a plausible explanation.
关键词methods: observational X-rays: binaries X-rays: individual (LS I+61 degrees 303)
学科领域Astronomy & Astrophysics
DOI10.1088/2041-8205/785/1/L19
收录类别SCI
WOS记录号WOS:000334345000019
引用统计
被引频次:4[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/311005/224850
专题粒子天体物理中心
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Li, J,Torres, DF,张澍;Zhang, S. SPECTRAL ANALYSIS IN ORBITAL/SUPERORBITAL PHASE SPACE AND HINTS OF SUPERORBITAL VARIABILITY IN THE HARD X-RAYS OF LS I+61 degrees 303[J]. ASTROPHYSICAL JOURNAL LETTERS,2014,785(1):L19.
APA Li, J,Torres, DF,&张澍;Zhang, S.(2014).SPECTRAL ANALYSIS IN ORBITAL/SUPERORBITAL PHASE SPACE AND HINTS OF SUPERORBITAL VARIABILITY IN THE HARD X-RAYS OF LS I+61 degrees 303.ASTROPHYSICAL JOURNAL LETTERS,785(1),L19.
MLA Li, J,et al."SPECTRAL ANALYSIS IN ORBITAL/SUPERORBITAL PHASE SPACE AND HINTS OF SUPERORBITAL VARIABILITY IN THE HARD X-RAYS OF LS I+61 degrees 303".ASTROPHYSICAL JOURNAL LETTERS 785.1(2014):L19.
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