CHANDRA OBSERVATION OF A WEAK SHOCK IN THE GALAXY CLUSTER A2556
文献类型：期刊论文
| 作者 | Qin, Zhenzhen1; Xu, Haiguang1; Wang, Jingying1; Wang, Yu2; Gu, Junhua3; Wu, Xiang-Ping1,3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2013 |
| 卷号 | 762期号:1页码:1 |
| 关键词 | galaxies: clusters: individual (A2556) intergalactic medium shock waves X-rays: galaxies: clusters |
| 英文摘要 | Based on a 21.5 ks Chandra observation of A2556, we identify an edge on the surface brightness profile at about 160 h(71)(-1) kpc northeast of the cluster center, and it corresponds to a shock front whose Mach number M is calculated to be 1.25(-0.03)(+0.02). No prominent substructure, such as sub-cluster, is found in either the optical or X-ray band that can be associated with the edge, suggesting that the conventional supersonic motion mechanism may not work in this case. As an alternative solution, we propose that the nonlinear steepening of an acoustic wave, which is induced by the turbulence of the intracluster medium at the core of the cluster, can be used to explain the origin of the shock front. Although nonlinear steepening weak shock is expected to occur frequently in clusters, why it is rarely observed still remains a question that requires further investigation, including both deeper X-ray observation and extensive theoretical studies. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | REFLECTION GRATING SPECTROMETER ; BOARD XMM-NEWTON ; COOLING FLOWS ; BOW SHOCK ; RAY ; SPECTROSCOPY ; SAMPLE ; CONSTRAINTS ; ATMOSPHERE ; WAVES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000313007900022 |
| 源URL | [http://119.78.226.72/handle/331011/18057]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin, Zhenzhen,Xu, Haiguang,Wang, Jingying,et al. CHANDRA OBSERVATION OF A WEAK SHOCK IN THE GALAXY CLUSTER A2556[J]. ASTROPHYSICAL JOURNAL,2013,762(1):1. |
| APA | Qin, Zhenzhen,Xu, Haiguang,Wang, Jingying,Wang, Yu,Gu, Junhua,&Wu, Xiang-Ping.(2013).CHANDRA OBSERVATION OF A WEAK SHOCK IN THE GALAXY CLUSTER A2556.ASTROPHYSICAL JOURNAL,762(1),1. |
| MLA | Qin, Zhenzhen,et al."CHANDRA OBSERVATION OF A WEAK SHOCK IN THE GALAXY CLUSTER A2556".ASTROPHYSICAL JOURNAL 762.1(2013):1. |
入库方式： OAI收割
来源：上海天文台
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