A MAGNETAR-LIKE EVENT FROM LS I +61 degrees 303 AND ITS NATURE AS A GAMMA-RAY BINARY
Torres, DF; Rea, N; Esposito, P; Li, J; Chen, YP; Zhang, S; Li J(李剑); Chen YP(陈玉鹏); Zhang S(张澍)
刊名ASTROPHYSICAL JOURNAL
2012
卷号744期号:2页码:106
关键词stars: magnetars X-rays: binaries X-rays: individual (LSI+61303)
学科分类Astronomy & Astrophysics
DOI10.1088/0004-637X/744/2/106
英文摘要We report on the Swift Burst Alert Telescope detection of a short burst from the direction of the TeV binary LS I + 61 degrees 303, resembling those generally labeled as magnetar-like. We show that it is likely that the short burst was indeed originating from LS I + 61 degrees 303 (although we cannot totally exclude the improbable presence of a far-away, line-of-sight magnetar) and that it is a different phenomenon with respect to the previously observed ks-long flares from this system. Accepting the hypothesis that LS I + 61 degrees 303 is the first magnetar detected in a binary system, we study those implications. We find that a magnetar-composed LS I + 61 degrees 303 system would most likely be (i.e., for the usual magnetar parameters and mass-loss rate) subject to a flip-flop behavior, from a rotationally powered regime (in the apastron) to a propeller regime (in the periastron) along each of the LS I + 61 degrees 303 eccentric orbital motion. We prove that, unlike near an apastron, where an interwind shock can lead to the normally observed LS I + 61 degrees 303 behavior, during TeV emission the periastron propeller is expected to efficiently accelerate particles only to sub-TeV energies. This flip-flop scenario would explain the system's behavior when a recurrent TeV emission only appears near the apastron, the anti-correlation of the GeV and TeV emission, and the long-term TeV variability (which seems correlated to LS I + 61 degrees 303's super-orbital period), including the appearance of a low TeV state. Finally, we qualitatively put the multi-wavelength phenomenology into the context of our proposed model and make some predictions for further testing.
收录类别SCI
WOS记录号WOS:000298666400026
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被引频次:30[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/311005/224420
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
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Torres, DF,Rea, N,Esposito, P,et al. A MAGNETAR-LIKE EVENT FROM LS I +61 degrees 303 AND ITS NATURE AS A GAMMA-RAY BINARY[J]. ASTROPHYSICAL JOURNAL,2012,744(2):106.
APA Torres, DF.,Rea, N.,Esposito, P.,Li, J.,Chen, YP.,...&张澍.(2012).A MAGNETAR-LIKE EVENT FROM LS I +61 degrees 303 AND ITS NATURE AS A GAMMA-RAY BINARY.ASTROPHYSICAL JOURNAL,744(2),106.
MLA Torres, DF,et al."A MAGNETAR-LIKE EVENT FROM LS I +61 degrees 303 AND ITS NATURE AS A GAMMA-RAY BINARY".ASTROPHYSICAL JOURNAL 744.2(2012):106.
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