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Baryon effects on the dark matter haloes constrained from strong gravitational lensing
Wang, Lin1,2; Chen, Da-Ming1,2; Li, Ran1
2017-10-01
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号471期号:1页码:523-531
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.
文章类型Article
关键词Gravitational Lensing: Strong Galaxies: Haloes Dark Matter Cosmology: Theory
WOS标题词Science & Technology ; Physical Sciences
资助者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
DOI10.1093/mnras/stx1617
关键词[WOS]ALL-SKY SURVEY ; MASS FUNCTION ; GALAXY FORMATION ; DENSITY PROFILES ; MILLENNIUM-XXL ; LAMBDA-CDM ; SCALING RELATIONS ; STELLAR FEEDBACK ; COSMIC TIME ; MOVING-MESH
收录类别SCI
语种英语
资助者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
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000408211700032
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/20086
专题星系宇宙学研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
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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.
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