Gas Contents of Galaxy Groups from Thermal Sunyaev–Zel’dovich Effects

doi:10.3847/1538-4357/aaaa21

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	Gas Contents of Galaxy Groups from Thermal Sunyaev–Zel’dovich Effects
	Lim,S. H.1; Mo,H. J.1,2; Li,Ran 3; Liu,Yue 1; Ma,Yin-Zhe 4,5; Wang,Huiyuan 6,7; Yang,Xiaohu 8,9
刊名	The Astrophysical Journal
	2018-02-26
卷号	854 期号:2
关键词	galaxies: evolution galaxies: formation galaxies: halos methods: statistical
ISSN号	0004-637X
DOI	10.3847/1538-4357/aaaa21
英文摘要	Abstract A matched filter technique is applied to the Planck all-sky Compton y-parameter map to measure the thermal Sunyaev–Zel’dovich (tSZ) effect produced by galaxy groups of different halo masses selected from large redshift surveys in the low-z universe. Reliable halo mass estimates are available for all of the groups, which allows us to bin groups of similar halo masses to investigate how the tSZ effect depends on halo mass over a large mass range. Filters are simultaneously matched for all groups to minimize projection effects. We find that the integrated y-parameter and the hot gas content it implies are consistent with the predictions of the universal pressure profile model only for massive groups above , but much lower than the model prediction for low-mass groups. The halo mass dependence found is in good agreement with the predictions of a set of simulations that include strong active galactic nucleus feedback, but simulations including only supernova feedback significantly overpredict the hot gas contents in galaxy groups. Our results suggest that hot gas in galaxy groups is either effectively ejected or in phases much below the virial temperatures of the host halos.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-854-2-AAAA21
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/35717]
专题	中国科学院国家天文台
作者单位	1.Department of Astronomy, University of Massachusetts, Amherst, MA 01003-9305, USA; slim@astro.umass.edu 2.Physics Department and Center for Astrophysics, Tsinghua University, Beijing 10084, People's Republic of China 3.Key laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, People's Republic of China 4.School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban, 4000, South Africa 5.NAOC-UKZN Computational Astrophysics Centre (NUCAC), University of KwaZulu-Natal, Durban, 4000, South Africa 6.Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China 7.School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, People's Republic of China 8.Department of Astronomy, and Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China 9.IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
推荐引用方式 GB/T 7714	Lim,S. H.,Mo,H. J.,Li,Ran,et al. Gas Contents of Galaxy Groups from Thermal Sunyaev–Zel’dovich Effects[J]. The Astrophysical Journal,2018,854(2).
APA	Lim,S. H..,Mo,H. J..,Li,Ran.,Liu,Yue.,Ma,Yin-Zhe.,...&Yang,Xiaohu.(2018).Gas Contents of Galaxy Groups from Thermal Sunyaev–Zel’dovich Effects.The Astrophysical Journal,854(2).
MLA	Lim,S. H.,et al."Gas Contents of Galaxy Groups from Thermal Sunyaev–Zel’dovich Effects".The Astrophysical Journal 854.2(2018).