XMM-Newton observation of the eclipsing binary Algol
文献类型：期刊论文
| 作者 | Yang XJ(杨学建); Lu FJ(卢方军) ; Yang, XJ; Lu, FJ; Aschenbach, B; Chen, L
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2011 |
| 卷号 | 11期号:4页码:457-470 |
| 关键词 | stars: abundance star: binaries: eclipsing stars: flare stars: individual: Algol |
| 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 |
| 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. |
| 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:000289611900008 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/237562]  |
| 专题 | 高能物理研究所_粒子天体物理中心 高能物理研究所_理论物理室 |
| 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 | 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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来源：高能物理研究所
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