Globular clusters versus dark matter haloes in strong lensing observations

doi:10.1093/mnras/sty2260

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	Globular clusters versus dark matter haloes in strong lensing observations
	He, Qiuhan 3,4; Li, Ran 3,4; Lim, Sungsoon 2,5; Frenk, Carlos S.1; Cole, Shaun 1; Peng, Eric W.2,5; Wang, Qiao 3,4
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2018-11-01
卷号	480 期号:4 页码:5084-5091
关键词	gravitational lensing: strong globular clusters: general dark matter
ISSN号	0035-8711
DOI	10.1093/mnras/sty2260
英文摘要	Small distortions in the images of Einstein rings or giant arcs offer the exciting prospect of detecting low mass dark matter haloes or subhaloes of mass below 10(9) M-circle dot (for independent haloes, the mass refers to M-200, and for subhaloes, the mass refers to the mass within tidal radius), most of which are too small to have made a visible galaxy. A very large number of such haloes are predicted to exist in the cold dark matter model of cosmogony; in contrast, other models, such as warm dark matter, predict no haloes below a mass of this order, which depends on the properties of the warm dark matter particle. Attempting to detect these small perturbers could therefore discriminate between different kinds of dark matter particles, and even rule out the cold dark matter model altogether. Globular clusters in the lens galaxy also induce distortions in the image, which could, in principle, contaminate the test. Here, we investigate the population of globular clusters in six early-type galaxies in the Virgo cluster. We find that the number density of globular clusters of mass M-GC similar to 10(6) M-circle dot is comparable to that of the dark matter perturbers (subhaloes in the lenses and haloes along the line of sight of comparable mass). We show that the very different degrees of mass concentration in globular clusters and dark matter haloes result in different lensing distortions. These are detectable with milli-arcsecond resolution imaging, which can distinguish between globular cluster and dark matter halo signals.
资助项目	National Key Program for Science and Technology Research and Development[2017YFB0203300] ; NSFC[11425312] ; NSFC[11503032] ; NSFC[11573031] ; NSFC[118513] ; NSFC[11773032] ; Newton award ; Nebula Talent Program of NAOC ; National Natural Science Foundation of China[11573002] ; STFC Consolidated Grant[ST/L00075X/1] ; ERC Advanced Investigator grant, COSMIWAY ; BIS National E-infrastructure capital grant[ST/K00042X/1] ; STFC capital grants[ST/H008519/1] ; STFC capital grants[ST/K00087X/1] ; STFC DiRAC Operations grant[ST/K003267/1] ; Durham University
WOS关键词	EARLY-TYPE GALAXIES ; MILKY-WAY ; SATELLITE GALAXIES ; MASS SUBSTRUCTURE ; STAR-CLUSTERS ; ACS SURVEY ; SUBHALOES ; STATISTICS ; PHOTOIONIZATION ; EVOLUTION
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000449617100063
资助机构	National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; NSFC ; NSFC ; Newton award ; Newton award ; Nebula Talent Program of NAOC ; Nebula Talent Program of NAOC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; STFC Consolidated Grant ; STFC Consolidated Grant ; ERC Advanced Investigator grant, COSMIWAY ; ERC Advanced Investigator grant, COSMIWAY ; BIS National E-infrastructure capital grant ; BIS National E-infrastructure capital grant ; STFC capital grants ; STFC capital grants ; STFC DiRAC Operations grant ; STFC DiRAC Operations grant ; Durham University ; Durham University ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; NSFC ; NSFC ; Newton award ; Newton award ; Nebula Talent Program of NAOC ; Nebula Talent Program of NAOC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; STFC Consolidated Grant ; STFC Consolidated Grant ; ERC Advanced Investigator grant, COSMIWAY ; ERC Advanced Investigator grant, COSMIWAY ; BIS National E-infrastructure capital grant ; BIS National E-infrastructure capital grant ; STFC capital grants ; STFC capital grants ; STFC DiRAC Operations grant ; STFC DiRAC Operations grant ; Durham University ; Durham University ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; NSFC ; NSFC ; Newton award ; Newton award ; Nebula Talent Program of NAOC ; Nebula Talent Program of NAOC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; STFC Consolidated Grant ; STFC Consolidated Grant ; ERC Advanced Investigator grant, COSMIWAY ; ERC Advanced Investigator grant, COSMIWAY ; BIS National E-infrastructure capital grant ; BIS National E-infrastructure capital grant ; STFC capital grants ; STFC capital grants ; STFC DiRAC Operations grant ; STFC DiRAC Operations grant ; Durham University ; Durham University ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; NSFC ; NSFC ; Newton award ; Newton award ; Nebula Talent Program of NAOC ; Nebula Talent Program of NAOC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; STFC Consolidated Grant ; STFC Consolidated Grant ; ERC Advanced Investigator grant, COSMIWAY ; ERC Advanced Investigator grant, COSMIWAY ; BIS National E-infrastructure capital grant ; BIS National E-infrastructure capital grant ; STFC capital grants ; STFC capital grants ; STFC DiRAC Operations grant ; STFC DiRAC Operations grant ; Durham University ; Durham University
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/23354]
专题	中国科学院国家天文台
通讯作者	Li, Ran
作者单位	1.Univ Durham, Dept Phys, Inst Computat Cosmol, South Rd, Durham DH1 3LE, England 2.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Beijing 100012, Peoples R China 4.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China 5.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	He, Qiuhan,Li, Ran,Lim, Sungsoon,et al. Globular clusters versus dark matter haloes in strong lensing observations[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,480(4):5084-5091.
APA	He, Qiuhan.,Li, Ran.,Lim, Sungsoon.,Frenk, Carlos S..,Cole, Shaun.,...&Wang, Qiao.(2018).Globular clusters versus dark matter haloes in strong lensing observations.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,480(4),5084-5091.
MLA	He, Qiuhan,et al."Globular clusters versus dark matter haloes in strong lensing observations".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 480.4(2018):5084-5091.