Baryon effects on the dark matter haloes constrained from strong gravitational lensing

doi:10.1093/mnras/stx1617

	Baryon effects on the dark matter haloes constrained from strong gravitational lensing
	Wang, Lin1,2 ; Chen, Da-Ming1,2 ; Li, Ran2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2017-10-01
卷号	471 期号:1 页码:523-531
关键词	Gravitational Lensing: Strong Galaxies: Haloes Dark Matter Cosmology: Theory
DOI	10.1093/mnras/stx1617
文献子类	Article
英文摘要	Simulations are expected to be a powerful tool to investigate the baryon effects on dark matter (DM) haloes. Recent high resolution, cosmological hydrodynamic simulations predict that the inner density profiles of DM haloes depend systematically on the ratio of stellar to DM mass (M-*/M-halo), which is thought to be able to provide good fits to the observed rotation curves of galaxies. The Di Cintio et al. (hereafter DC14) profile is fitted from the simulations that are confined to M-halo <= 10(12) M-circle dot; in order to investigate the physical processes that may affect all haloes, we extrapolate it to much larger halo mass, including that of galaxy clusters. The inner slope of the DC14 profile is flat for low halo mass, it approaches 1 when the halo mass increases towards 10(12) M-circle dot and decreases rapidly after that mass. We use the DC14 profile for lenses and find that it predicts too few lenses compared with the most recent strong lensing observations Sloan Digital Sky Survey Quasar Lens Search (SQLS). We also calculate the strong lensing probabilities for a simulated density profile that continues the halo mass from the mass end of DC14 (similar to 10(12) M-circle dot) to the mass that covers the galaxy clusters, and find that this Schaller et al. (hereafter Schaller15) model predict too many lenses compared with other models and SQLS observations. Interestingly, Schaller15 profile has no core, however, like DC14, the rotation curves of the simulated haloes are in excellent agreement with observational data. Furthermore, we show that the standard two-population model SIS+NFW cannot match the most recent SQLS observations for large image separations.
WOS关键词	ALL-SKY SURVEY ; MASS FUNCTION ; GALAXY FORMATION ; DENSITY PROFILES ; MILLENNIUM-XXL ; LAMBDA-CDM ; SCALING RELATIONS ; STELLAR FEEDBACK ; COSMIC TIME ; MOVING-MESH
WOS研究方向	Astronomy & Astrophysics
语种	英语
WOS记录号	WOS:000408211700032
资助机构	National Natural Science Foundation of China(11073023) ; National Natural Science Foundation of China(11073023) ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Science Funding of NAOC ; Youth Science Funding of NAOC ; National Natural Science Foundation of China(11073023) ; National Natural Science Foundation of China(11073023) ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Science Funding of NAOC ; Youth Science Funding of NAOC
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/20086]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Wang, Lin,Chen, Da-Ming,Li, Ran. Baryon effects on the dark matter haloes constrained from strong gravitational lensing[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,471(1):523-531.
APA	Wang, Lin,Chen, Da-Ming,&Li, Ran.(2017).Baryon effects on the dark matter haloes constrained from strong gravitational lensing.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,471(1),523-531.
MLA	Wang, Lin,et al."Baryon effects on the dark matter haloes constrained from strong gravitational lensing".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 471.1(2017):523-531.