On the origin of central abundance drops in the intracluster medium of galaxy groups and clusters
文献类型：期刊论文
| 作者 | Liu, Ang1,2,3; Zhai, Meng4; Tozzi, Paolo1 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2019-05-01 |
| 卷号 | 485期号:2页码:1651-1664 |
| 关键词 | galaxies: clusters: intracluster medium X-rays: galaxies: clusters |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/stz533 |
| 英文摘要 | A central drop of ICM Fe abundance has been observed in several cool-core clusters. It has been proposed that this abundance drop may be due, at least partially, to the depletion of Fe into dust grains in the central, high-density regions. According to this scenario, noble gas elements such as Ar and Ne are not expected to be depleted into dust, and therefore should not show any drop, but follow the general increase of metal abundance towards the centre. In this work, we test this scenario by measuring with Chandra data the radial profiles of Ar and Ne in a sample of 12 groups and clusters where a central drop in Fe abundance has been detected. We confirm the presence of the Fe drop in 10 out of 12 clusters at more than 2 sigma c.l., and 4 Ar drops with similar significance. We also find 4 Ne drops, with the caveat that Ne abundance measurement from CCD spectra suffers from systematics not completely under control. Our results are consistent with an abundance drop common to the three elements. When comparing the profiles, we find that, on average, the abundance profiles of Ar and Ne are significantly higher than Fe and steeper towards the centre, while they all gradually become consistent with solar composition at r >= 0.05r(500). We also check that Si and S profiles are mostly consistent with Fe. This result confirms a scenario in which some fraction of Fe is depleted into dust grains in the inner regions, although the global central abundance drop is mostly due to mechanical processes, like the displacement of metal-rich ICM from the very centre to larger radii by AGN-driven feedback. Finally, we report the detection of an Fe drop in the cluster MACSJ1423.8+2404 at z = 0.543, showing that this feature appears early on in cool-core clusters. |
| WOS关键词 | DEEP CHANDRA OBSERVATION ; X-RAY SPECTROSCOPY ; COOLING FLOWS ; PERSEUS CLUSTER ; XMM-NEWTON ; BUOYANT BUBBLES ; STAR-FORMATION ; RADIO JETS ; HOT GAS ; TEMPERATURE |
| 资助项目 | Istituto Nazionale di Astrofisica (INAF) PRIN-SKA 2017 program[1.05.01.88.04] ; ASI-INAF[2017-14-H.O] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000474886200011 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | Istituto Nazionale di Astrofisica (INAF) PRIN-SKA 2017 program ; Istituto Nazionale di Astrofisica (INAF) PRIN-SKA 2017 program ; ASI-INAF ; ASI-INAF ; Istituto Nazionale di Astrofisica (INAF) PRIN-SKA 2017 program ; Istituto Nazionale di Astrofisica (INAF) PRIN-SKA 2017 program ; ASI-INAF ; ASI-INAF ; Istituto Nazionale di Astrofisica (INAF) PRIN-SKA 2017 program ; Istituto Nazionale di Astrofisica (INAF) PRIN-SKA 2017 program ; ASI-INAF ; ASI-INAF ; Istituto Nazionale di Astrofisica (INAF) PRIN-SKA 2017 program ; Istituto Nazionale di Astrofisica (INAF) PRIN-SKA 2017 program ; ASI-INAF ; ASI-INAF |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/27011]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Liu, Ang; Zhai, Meng |
| 作者单位 | 1.INAF Osservatorio Astrofis Arcetri, I-50122 Florence, Italy 2.Sapienza Univ Rome, Dept Phys, I-00185 Rome, Italy 3.Univ Roma Tor Vergata, Dept Phys, I-00133 Rome, Italy 4.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Ang,Zhai, Meng,Tozzi, Paolo. On the origin of central abundance drops in the intracluster medium of galaxy groups and clusters[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,485(2):1651-1664. |
| APA | Liu, Ang,Zhai, Meng,&Tozzi, Paolo.(2019).On the origin of central abundance drops in the intracluster medium of galaxy groups and clusters.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,485(2),1651-1664. |
| MLA | Liu, Ang,et al."On the origin of central abundance drops in the intracluster medium of galaxy groups and clusters".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 485.2(2019):1651-1664. |
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来源：国家天文台
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