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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, Dan1; Xu, Haiguang1,2,3; Kang, Xi4; Li, Weitian1; Zhu, Zhenghao1; Ma, Zhixian5; Shan, Chenxi1; Zhang, Zhongli6; Gu, Liyi7; Liu, Chengze1; Zheng, Qian6; Wu, Xiang-ping8
2019-01-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume870Issue:2Pages:24
Corresponding AuthorHu, Dan(hudan_bazhaoyu@sjt.edu.cn)
AbstractWe 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.
Keywordgalaxies: clusters: intracluster medium galaxies: groups: individual (HCG 62) intergalactic medium methods: numerical X-rays: galaxies
DOI10.3847/1538-4357/aaf16c
WOS KeywordXMM-NEWTON OBSERVATIONS ; DEEP CHANDRA OBSERVATION ; POPULATION-III STARS ; DIGITAL SKY SURVEY ; DARK-MATTER ; INTRACLUSTER MEDIUM ; METAL ENRICHMENT ; HOT GAS ; ELEMENTAL ABUNDANCES ; CHEMICAL EVOLUTION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000455820100007
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/19993
Collection中国科学院紫金山天文台
Corresponding AuthorHu, Dan
Affiliation1.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
Recommended Citation
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.
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