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High spatial resolution X-ray spectroscopy of Cas A with Chandra
Yang XJ(杨学静); Lu FJ(卢方军); Yang, XJ; Lu, FJ; Chen, L
2008
发表期刊CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
卷号8期号:4页码:439-450
通讯作者[Yang, Xue-Juan ; Lu, Fang-Jun] Chinese Acad Sci, Inst High Energy Phys, Ctr Particle Astrophys, Beijing 100049, Peoples R China ; [Yang, Xue-Juan ; Chen, Li] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
摘要We present high spatial resolution X-ray spectroscopy of the supernova remnant Cassiopeia A with the Chandra observations. The X-ray emitting region of this remnant was divided into 38 x 34 pixels of 10 '' x 10 '' each. Spectra of 960 pixels were created and fitted with an absorbed two component non-equilibrium ionization model. From the results of the spectral analysis we obtained maps of absorbing column density, temperatures, ionization ages, and the abundances of Ne, Mg, Si, S, Ca and Fe. The Si, S and possibly Ca abundance maps show obvious jet structures, while Fe does not follow the jet but seems to be distributed perpendicular to it. The abundances of Si, S and Ca show tight correlations between one another over a range of about two dex. This suggests that they are ejecta from explosive O-burning and incomplete Si-burning. Meanwhile, the Ne abundance is well correlated with that of Mg, indicating them to be the ashes of explosive C/Ne burning. The Fe abundance is positively correlated with that of Si when the latter is lower than 3 times the solar value, and is negatively correlated when higher. We suggest that such a two phase correlation is due to the different ways in which Fe was synthesized.
文章类型Article
关键词ISM : supernova remnants ISM : individual : Cassiopeia A
学科领域Astronomy & Astrophysics
DOI10.1088/1009-9271/8/4/08
研究领域[WOS]Astronomy & Astrophysics
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语种英语
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000258698200008
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被引频次:9[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/311005/237494
专题粒子天体物理中心
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. High spatial resolution X-ray spectroscopy of Cas A with Chandra[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2008,8(4):439-450.
APA 杨学静,卢方军,Yang, XJ,Lu, FJ,&Chen, L.(2008).High spatial resolution X-ray spectroscopy of Cas A with Chandra.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,8(4),439-450.
MLA 杨学静,et al."High spatial resolution X-ray spectroscopy of Cas A with Chandra".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 8.4(2008):439-450.
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