XMM-Newton observation of the eclipsing binary Algol
文献类型：期刊论文
| 作者 | Yang XJ(杨雪娟); Lu FJ(卢方军) ; Bernd Aschenbach; Li Chen
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| 刊名 | 天文和天体物理学研究
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| 出版日期 | 2011 |
| 期号 | 4页码:457-470 |
| 关键词 | Xue-Juan Chen（Faculty of Materials Optoelectronics and Physics Xiangtan University Xiangtan China Yang Particle Astrophysics Center Institute of High Energy Physics Chinese Academy of Sciences Beijing China Max-Planck-Institut fur Extraterrestrische Physik Garching Germany Department of Astronomy Beijing Normal University Beijing China） Fang-Jun Lu Bemd Aschenbach Li |
| 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 6.4×106 K while that of the hot component ranges from 2 to 4.0×107 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 differentbetween the cool and the hot componentand between the quiescent and the flare phase with the exception of Fe.Although the Fe abundance of the cool component remains constant at ～0.14,the hot component shows an Fe abundance of ～0.28,which increases to ～0.44 during the flare.This increase is expected from the chromospheric evaporation model.The absorbing column density NH of the quiescent emission is 2.5×1020 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. |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/218081]  |
| 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 |
| 推荐引用方式 GB/T 7714 | Yang XJ,Lu FJ,Bernd Aschenbach,et al. XMM-Newton observation of the eclipsing binary Algol[J]. 天文和天体物理学研究,2011(4):457-470. |
| APA | 杨雪娟,卢方军,Bernd Aschenbach,&Li Chen.(2011).XMM-Newton observation of the eclipsing binary Algol.天文和天体物理学研究(4),457-470. |
| MLA | 杨雪娟,et al."XMM-Newton observation of the eclipsing binary Algol".天文和天体物理学研究 .4(2011):457-470. |
入库方式： OAI收割
来源：高能物理研究所
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