A Study of the Merger History of the Galaxy Group HCG 62 Based on X-Ray Observations and Smoothed Particle Hydrodynamic Simulations

doi:10.3847/1538-4357/aaf16c

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	A Study of the Merger History of the Galaxy Group HCG 62 Based on X-Ray Observations and Smoothed Particle Hydrodynamic Simulations
	Hu, Dan 1; Xu, Haiguang 1,2,3; Kang, Xi 4; Li, Weitian 1; Zhu, Zhenghao 1; Ma, Zhixian 5; Shan, Chenxi 1; Zhang, Zhongli 6; Gu, Liyi 7; Liu, Chengze 1
刊名	ASTROPHYSICAL JOURNAL
	2019-01-10
卷号	870 期号:2 页码:24
关键词	galaxies: clusters: intracluster medium galaxies: groups: individual (HCG 62) intergalactic medium methods: numerical X-rays: galaxies
ISSN号	0004-637X
DOI	10.3847/1538-4357/aaf16c
英文摘要	We chose the bright compact group HCG 62, which has been found to exhibit both excess X-ray emission and high Fe abundance to the southwest of its core, as an example to study the impact of mergers on chemical enrichment in the intragroup medium. We first reanalyze the high-quality Chandra and XMM-Newton archive data to search for evidence of additional SN II yields, which is expected to be a direct result of the possible merger-induced starburst. We reveal that, similar to the Fe abundance, the Mg abundance also shows a high value in both the innermost region and the southwest substructure, forming a high-abundance plateau. Meanwhile, all the SN Ia and SN II yields show rather flat distributions in >0.1r(200) in favor of an early enrichment. Then, we carry out a series of idealized numerical simulations to model the collision of two initially isolated galaxy groups by using the TreePM-SPH GADGET-3 code. We find that the observed X-ray emission and metal distributions, as well as the relative positions of the two bright central galaxies with reference to the X-ray peak, can be well reproduced in a major merger with a mass ratio of 3 when the merger-induced starburst is assumed. The "best-match" snapshot is pinpointed after the third pericentric passage when the southwest substructure is formed due to gas sloshing. By following the evolution of the simulated merging system, we conclude that the effects of such a major merger on chemical enrichment are mostly restricted to within the core region when the final relaxed state is reached.
资助项目	Ministry of Science and Technology of China[2018YFA0404601] ; National Science Foundation of China[11203017] ; National Science Foundation of China[11333008] ; National Science Foundation of China[11433002] ; National Science Foundation of China[11621303] ; National Science Foundation of China[11673017] ; National Science Foundation of China[11835009] ; National Science Foundation of China[61371147] ; National Key Research and Discovery Plan[2017YFF0210903] ; National Key Basic Research Program of China[2015CB857002] ; Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education ; Shanghai Key Laboratory for Particle Physics and Cosmology (SKLPPC)
WOS关键词	XMM-NEWTON OBSERVATIONS ; DEEP CHANDRA OBSERVATION ; POPULATION-III STARS ; DIGITAL SKY SURVEY ; DARK-MATTER ; INTRACLUSTER MEDIUM ; METAL ENRICHMENT ; HOT GAS ; ELEMENTAL ABUNDANCES ; CHEMICAL EVOLUTION
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000455820100007
资助机构	Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Science Foundation of China ; National Science Foundation of China ; National Key Research and Discovery Plan ; National Key Research and Discovery Plan ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education ; Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education ; Shanghai Key Laboratory for Particle Physics and Cosmology (SKLPPC) ; Shanghai Key Laboratory for Particle Physics and Cosmology (SKLPPC) ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Science Foundation of China ; National Science Foundation of China ; National Key Research and Discovery Plan ; National Key Research and Discovery Plan ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education ; Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education ; Shanghai Key Laboratory for Particle Physics and Cosmology (SKLPPC) ; Shanghai Key Laboratory for Particle Physics and Cosmology (SKLPPC) ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Science Foundation of China ; National Science Foundation of China ; National Key Research and Discovery Plan ; National Key Research and Discovery Plan ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education ; Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education ; Shanghai Key Laboratory for Particle Physics and Cosmology (SKLPPC) ; Shanghai Key Laboratory for Particle Physics and Cosmology (SKLPPC) ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Science Foundation of China ; National Science Foundation of China ; National Key Research and Discovery Plan ; National Key Research and Discovery Plan ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education ; Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education ; Shanghai Key Laboratory for Particle Physics and Cosmology (SKLPPC) ; Shanghai Key Laboratory for Particle Physics and Cosmology (SKLPPC)
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/24766]
专题	中国科学院国家天文台
通讯作者	Hu, Dan
作者单位	1.Shanghai Jiao Tong Univ, Sch Phys & Astron, 800 Dongchuan Rd, Shanghai 200240, Peoples R China 2.Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, 800 Dongchuan Rd, Shanghai 200240, Peoples R China 3.Shanghai Jiao Tong Univ, IFSA Collaborat Innovat Ctr, Shanghai 200240, Peoples R China 4.Purple Mt Observ, Partner Grp MPI Astron, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China 5.Shanghai Jiao Tong Univ, Dept Elect Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China 6.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 7.SRON Netherlands Inst Space Res, Sorbonnelaan 2, NL-3584 CA Utrecht, Netherlands 8.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Hu, Dan,Xu, Haiguang,Kang, Xi,et al. A Study of the Merger History of the Galaxy Group HCG 62 Based on X-Ray Observations and Smoothed Particle Hydrodynamic Simulations[J]. ASTROPHYSICAL JOURNAL,2019,870(2):24.
APA	Hu, Dan.,Xu, Haiguang.,Kang, Xi.,Li, Weitian.,Zhu, Zhenghao.,...&Wu, Xiang-ping.(2019).A Study of the Merger History of the Galaxy Group HCG 62 Based on X-Ray Observations and Smoothed Particle Hydrodynamic Simulations.ASTROPHYSICAL JOURNAL,870(2),24.
MLA	Hu, Dan,et al."A Study of the Merger History of the Galaxy Group HCG 62 Based on X-Ray Observations and Smoothed Particle Hydrodynamic Simulations".ASTROPHYSICAL JOURNAL 870.2(2019):24.