High Spatial Resolution X-Ray Spectroscopy of Cas A with Chandra
文献类型：期刊论文
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| 作者 | Xue-JuanYang; Fang-JunLu; LiChen; Xue-Juan Yang; Fang-Jun Lu; Li Chen; Yang XJ(杨雪娟); Lu FJ(卢方军)
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| 刊名 | 中国天文和天体物理学报（英文版）;2008;第4期;
 ; 中国天文和天体物理学报（英文版）;2008;第4期;
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| 出版日期 | 2008 ; 2008 |
| 期号 | 4 |
| 关键词 | ISM: supernova remnants --ISM: individual: Cassiopeia A ISM: supernova remnants --ISM: individual: Cassiopeia A |
| 通讯作者 | 杨雪娟 ; 杨雪娟 |
| 英文摘要 | 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.; 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. |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/218033]  |
| 专题 | 高能物理研究所_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, 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;, 中国天文和天体物理学报（英文版）;2008;第4期;,2008, 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). |
入库方式： OAI收割
来源：高能物理研究所
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