Simulating the Galaxy Cluster "El Gordo": Gas Motion, Kinetic Sunyaev-Zel'dovich Signal, and X-Ray Line Features
文献类型：期刊论文
| 作者 | Zhang, Congyao1,3; Yu, Qingjuan1; Lu, Youjun2,4 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2018-03-01 |
| 卷号 | 855期号:1页码:10 |
| 关键词 | galaxies: clusters: general galaxies: clusters: individual (ACT-CL J0102-4915) large-scale structure of universe methods: numerical X-rays: galaxies: clusters |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aaab4c |
| 英文摘要 | The massive galaxy cluster "El Gordo" (ACT-CL J0102-4915) is a rare merging system with a high collision speed suggested by multi-wavelength observations and theoretical modeling. Zhang et al. propose two types of mergers, a nearly head-on merger and an off-axis merger with a large impact parameter, to reproduce most of the observational features of the cluster using numerical simulations. The different merger configurations of the two models result in different gas motion in the simulated clusters. In this paper, we predict the kinetic Sunyaev-Zel'dovich (kSZ) effect, the relativistic correction of the thermal Sunyaev-Zel'dovich (tSZ) effect, and the X-ray spectrum of this cluster, based on the two proposed models. We find that (1) the amplitudes of the kSZ effect resulting from the two models are both on the order of Delta T/T similar to 10(-5); but their morphologies are different, which trace the different line-of-sight velocity distributions of the systems; (2) the relativistic correction of the tSZ effect around 240 GHz can be possibly used to constrain the temperature of the hot electrons heated by the shocks; and (3) the shift between the X-ray spectral lines emitted from different regions of the cluster can be significantly different in the two models. The shift and the line broadening can be up to similar to 25 eV and 50 eV, respectively. We expect that future observations of the kSZ effect and the X-ray spectral lines (e.g., by ALMA, XARM) will provide a strong constraint on the gas motion and the merger configuration of ACT-CL J0102-4915. |
| WOS关键词 | RELATIVISTIC CORRECTIONS ; FLOWS ; SHOCK ; CODE |
| 资助项目 | National Natural Science Foundation of China[11673001] ; National Natural Science Foundation of China[11273004] ; National Natural Science Foundation of China[11373031] ; National Natural Science Foundation of China[11390372] ; National Key R&D Program of China[2016YFA0400703] ; National Key R&D Program of China[2016YFA0400704] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000426709000008 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/37258]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Lu, Youjun |
| 作者单位 | 1.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85741 Garching, Germany 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Congyao,Yu, Qingjuan,Lu, Youjun. Simulating the Galaxy Cluster "El Gordo": Gas Motion, Kinetic Sunyaev-Zel'dovich Signal, and X-Ray Line Features[J]. ASTROPHYSICAL JOURNAL,2018,855(1):10. |
| APA | Zhang, Congyao,Yu, Qingjuan,&Lu, Youjun.(2018).Simulating the Galaxy Cluster "El Gordo": Gas Motion, Kinetic Sunyaev-Zel'dovich Signal, and X-Ray Line Features.ASTROPHYSICAL JOURNAL,855(1),10. |
| MLA | Zhang, Congyao,et al."Simulating the Galaxy Cluster "El Gordo": Gas Motion, Kinetic Sunyaev-Zel'dovich Signal, and X-Ray Line Features".ASTROPHYSICAL JOURNAL 855.1(2018):10. |
入库方式： OAI收割
来源：国家天文台
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