NAOC Open IR
Compact Groups of Galaxies in Sloan Digital Sky Survey and LAMOST Spectral Survey. II. Dynamical Properties of Isolated and Embedded Groups
Zheng, Yun-Liang1,2; Shen, Shi-Yin1,3
2021-04-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume911Issue:2Pages:13
AbstractCompact groups (CGs) of galaxies appear to be the densest galaxy systems containing a few luminous galaxies in close proximity to each other, which have a typical size of a few tens of kiloparsec in observation. On the other hand, in the modern hierarchical structure formation paradigm, galaxies are assembled and grouped in dark matter halos, which have a typical size of a few hundreds of kiloparsec. Few studies have explored the physical connection between the observation-based CGs and halo model-based galaxy groups to date. In this study, by matching the largest local CG catalog of Zheng & Shen to the halo-based group catalog of Yang et al., we find that CGs are physically heterogeneous systems and can be mainly separated into two categories, the isolated systems and those embedded in rich groups or clusters. By examining the dynamical features of CGs, we find that isolated CGs have systematically lower dynamical masses than noncompact ones at the same group luminosity, indicating a more evolved stage of isolated CGs. On the other hand, the embedded CGs are mixtures of chance alignments in poor clusters and recent infalling groups (substructures) of rich clusters.
Funding OrganizationNational 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 ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission ; 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 ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission ; 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 ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission ; 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 ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission
DOI10.3847/1538-4357/abeaa2
Language英语
Funding ProjectNational Key R&D Program of China[2019YFA0405501] ; National Natural Science Foundation of China[12073059] ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission
Funding OrganizationNational 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 ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission ; 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 ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission ; 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 ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission ; 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 ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000643719100001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/78353
Collection中国科学院国家天文台
Corresponding AuthorShen, Shi-Yin
Affiliation1.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Key Lab Astrophys, Shanghai 200034, Peoples R China
Recommended Citation
GB/T 7714
Zheng, Yun-Liang,Shen, Shi-Yin. Compact Groups of Galaxies in Sloan Digital Sky Survey and LAMOST Spectral Survey. II. Dynamical Properties of Isolated and Embedded Groups[J]. ASTROPHYSICAL JOURNAL,2021,911(2):13.
APA Zheng, Yun-Liang,&Shen, Shi-Yin.(2021).Compact Groups of Galaxies in Sloan Digital Sky Survey and LAMOST Spectral Survey. II. Dynamical Properties of Isolated and Embedded Groups.ASTROPHYSICAL JOURNAL,911(2),13.
MLA Zheng, Yun-Liang,et al."Compact Groups of Galaxies in Sloan Digital Sky Survey and LAMOST Spectral Survey. II. Dynamical Properties of Isolated and Embedded Groups".ASTROPHYSICAL JOURNAL 911.2(2021):13.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zheng, Yun-Liang]'s Articles
[Shen, Shi-Yin]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zheng, Yun-Liang]'s Articles
[Shen, Shi-Yin]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zheng, Yun-Liang]'s Articles
[Shen, Shi-Yin]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.