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High Spatial Resolution X-Ray Spectroscopy of Cas A with Chandra
Xue-JuanYang; Fang-JunLu; LiChen;  Xue-Juan Yang;  Fang-Jun Lu;  Li Chen;  Yang XJ(杨雪娟); Lu FJ(卢方军)
2008
发表期刊中国天文和天体物理学报(英文版);2008;第4期;
期号4
通讯作者杨雪娟
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 × 34 pixels of 10″× 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 Oburning and incomplete Si-buming. 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.
关键词ISM: supernova remnants --ISM: individual: Cassiopeia A
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/218033
专题粒子天体物理中心
推荐引用方式
GB/T 7714
Xue-JuanYang,Fang-JunLu,LiChen;Xue-Juan Yang;Fang-Jun Lu;Li Chen;杨雪娟,et al. High Spatial Resolution X-Ray Spectroscopy of Cas A with Chandra[J]. 中国天文和天体物理学报(英文版);2008;第4期;,2008(4).
APA Xue-JuanYang,Fang-JunLu,LiChen;Xue-Juan Yang;Fang-Jun Lu;Li Chen;杨雪娟,&卢方军.(2008).High Spatial Resolution X-Ray Spectroscopy of Cas A with Chandra.中国天文和天体物理学报(英文版);2008;第4期;(4).
MLA Xue-JuanYang,et al."High Spatial Resolution X-Ray Spectroscopy of Cas A with Chandra".中国天文和天体物理学报(英文版);2008;第4期; .4(2008).
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