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Integrated HI emission in galaxy groups and clusters
Ai, Mei1,2,3; Zhu, Ming1,2; Fu, Jian4
2017-09-01
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
卷号17期号:10
摘要The integrated HI emission from hierarchical structures such as groups and clusters of galaxies can be detected by FAST at intermediate redshifts. Here we propose to use FAST to study the evolution of the global HI content of clusters and groups over cosmic time by measuring their integrated HI emissions. We use the Virgo Cluster as an example to estimate the detection limit of FAST, and have estimated the integration time to detect a Virgo type cluster at different redshifts (from z = 0.1 to z = 1.5). We have also employed a semi-analytic model (SAM) to simulate the evolution of HI contents in galaxy clusters. Our simulations suggest that the HI mass of a Virgo-like cluster could be 2-3 times higher and the physical size could be more than 50% smaller when redshift increases from z = 0.3 to z = 1. Thus the integration time could be reduced significantly and gas rich clusters at intermediate redshifts can be detected by FAST in less than 2 hours of integration time. For the local Universe, we have also used SAM simulations to create mock catalogs of clusters to predict the outcomes from FAST all sky surveys. Comparing with the optically selected catalogs derived by cross matching the galaxy catalogs from the SDSS survey and the ALFALFA survey, we find that the HI mass distribution of the mock catalog with 20 s of integration time agrees well with that of observations. However, the mock catalog with 120 s of integration time predicts many more groups and clusters that contain a population of low mass HI galaxies not detected by the ALFALFA survey. A future deep HI blind sky survey with FAST would be able to test such prediction and set constraints on the numerical simulation models. The observational strategy and sample selections for future FAST observations of galaxy clusters at high redshifts are also discussed.
文章类型Article
关键词Galaxy Clusters Neutral Hydrogen (Hi) Galaxy Evolution
WOS标题词Science & Technology ; Physical Sciences
资助者NSFC(U1531246 ; NSFC(U1531246 ; China Ministry of Science and Technology(2017YFA0402600) ; China Ministry of Science and Technology(2017YFA0402600) ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Key Laboratory of Computational Astrophysics, National Astronomical Observatories, CAS ; Key Laboratory of Computational Astrophysics, National Astronomical Observatories, CAS ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; National Science Foundation ; National Science Foundation ; US Department of Energy Office of Science ; US Department of Energy Office of Science ; U1531123) ; U1531123) ; NSFC(U1531246 ; NSFC(U1531246 ; China Ministry of Science and Technology(2017YFA0402600) ; China Ministry of Science and Technology(2017YFA0402600) ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Key Laboratory of Computational Astrophysics, National Astronomical Observatories, CAS ; Key Laboratory of Computational Astrophysics, National Astronomical Observatories, CAS ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; National Science Foundation ; National Science Foundation ; US Department of Energy Office of Science ; US Department of Energy Office of Science ; U1531123) ; U1531123)
DOI10.1088/1674-4527/17/10/101
关键词[WOS]STAR-FORMATION ; GAS DEFICIENCY ; PILOT SURVEY ; TO 0.2 ; EVOLUTION ; SPIRALS ; PROJECT
收录类别SCI
语种英语
资助者NSFC(U1531246 ; NSFC(U1531246 ; China Ministry of Science and Technology(2017YFA0402600) ; China Ministry of Science and Technology(2017YFA0402600) ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Key Laboratory of Computational Astrophysics, National Astronomical Observatories, CAS ; Key Laboratory of Computational Astrophysics, National Astronomical Observatories, CAS ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; National Science Foundation ; National Science Foundation ; US Department of Energy Office of Science ; US Department of Energy Office of Science ; U1531123) ; U1531123) ; NSFC(U1531246 ; NSFC(U1531246 ; China Ministry of Science and Technology(2017YFA0402600) ; China Ministry of Science and Technology(2017YFA0402600) ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Key Laboratory of Computational Astrophysics, National Astronomical Observatories, CAS ; Key Laboratory of Computational Astrophysics, National Astronomical Observatories, CAS ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; National Science Foundation ; National Science Foundation ; US Department of Energy Office of Science ; US Department of Energy Office of Science ; U1531123) ; U1531123)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000415007500002
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/20213
专题射电天文研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Beijing 100012, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
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Ai, Mei,Zhu, Ming,Fu, Jian. Integrated HI emission in galaxy groups and clusters[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2017,17(10).
APA Ai, Mei,Zhu, Ming,&Fu, Jian.(2017).Integrated HI emission in galaxy groups and clusters.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,17(10).
MLA Ai, Mei,et al."Integrated HI emission in galaxy groups and clusters".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 17.10(2017).
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