XMM-Newton observation of the eclipsing binary Algol
Yang XJ(杨学建); Lu FJ(卢方军); Yang, XJ; Lu, FJ; Aschenbach, B; Chen, L
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
2011
卷号11期号:4页码:457-470
关键词stars: abundance star: binaries: eclipsing stars: flare stars: individual: Algol
学科分类Astronomy & Astrophysics
通讯作者[Yang, Xue-Juan] Xiangtan Univ, Fac Mat Optoelect & Phys, Xiangtan 411105, Peoples R China ; [Yang, Xue-Juan ; Lu, Fang-Jun] Chinese Acad Sci, Inst High Energy Phys, Ctr Particle Astrophys, Beijing 100049, Peoples R China ; [Aschenbach, Bernd] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany ; [Chen, Li] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
文章类型Article
英文摘要We present an XMM-Newton observation of the eclipsing binary Algol which contains an X-ray dark B8V primary and an X-ray bright K2IV secondary. The observation covered the optical secondary eclipse and captured an X-ray flare that was eclipsed by the B star. The XMM-Newton European Photon imaging Camera and Reflection Grating Spectrometer spectra of Algol in its quiescent state are described by a two-temperature plasma model. The cool component has a temperature around 6.4 x 10(6) K while that of the hot component ranges from 2 to 4.0 x 10(7) K. Coronal abundances of C, N, O, Ne, Mg, Si and Fe were obtained for each component for both the quiescent and the flare phases, generally with upper limits for S and Ar, and upper limits for C, N, and O from the hot component. F-tests show that the abundances do not need to be different between the cool and the hot component and between the quiescent and the flare phase with the exception of Fe. Although the Fe abundance of the cool component remains constant at similar to 0.14, the hot component shows an Fe abundance of similar to 0.28, which increases to similar to 0.44 during the flare. This increase is expected from the chromospheric evaporation model. The absorbing column density N-H of the quiescent emission is 2.5 x 10(20) cm(-2), while that of the flare-only emission is significantly lower and consistent with the column density of the interstellar medium. This observation substantiates earlier suggestions of the presence of X-ray absorbing material in the Algol system.
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:000289611900008
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被引频次:3[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/311005/237562
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
作者单位中国科学院高能物理研究所
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Yang XJ,Lu FJ,Yang, XJ,et al. XMM-Newton observation of the eclipsing binary Algol[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2011,11(4):457-470.
APA 杨学建,卢方军,Yang, XJ,Lu, FJ,Aschenbach, B,&Chen, L.(2011).XMM-Newton observation of the eclipsing binary Algol.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,11(4),457-470.
MLA 杨学建,et al."XMM-Newton observation of the eclipsing binary Algol".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 11.4(2011):457-470.
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