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Evidence for galaxy assembly bias in BOSS CMASS redshift-space galaxy correlation function
Yuan, Sihan1; Hadzhiyska, Boryana1; Bose, Sownak1; Eisenstein, Daniel J.1; Guo, Hong2
2021-04-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume502Issue:3Pages:3582-3598
AbstractBuilding accurate and flexible galaxy-halo connection models is crucial in modelling galaxy clustering on non-linear scales. Recent studies have found that halo concentration by itself cannot capture the full galaxy assembly bias effect and that the local environment of the halo can be an excellent indicator of galaxy assembly bias. In this paper, we propose an extended halo occupation distribution (HOD) model that includes both a concentration-based assembly bias term and an environment-based assembly bias term. We use this model to achieve a good fit (chi(2)/degrees of freedom = 1.35) on the 2D redshift-space two-point correlation function (2PCF) of the Baryon Oscillation Spectroscopic Survey (BOSS) CMASS galaxy sample. We find that the inclusion of both assembly bias terms is strongly favoured by the data and the standard five-parameter HOD model is strongly rejected. More interestingly, the redshift-space 2PCF drives the assembly bias parameters in a way that preferentially assigns galaxies to lower mass haloes. This results in galaxy-galaxy lensing predictions that are within 1 sigma agreement with the observation, alleviating the perceived tension between galaxy clustering and lensing. We also showcase a consistent 3 sigma-5 sigma, preference for a positive environment-based assembly bias that persists over variations in the fit. We speculate that the environmental dependence might be driven by underlying processes such as mergers and feedback, but might also be indicative of a larger halo boundaries such as the splashback radius. Regardless, this work highlights the importance of building flexible galaxy-halo connection models and demonstrates the extra constraining power of the redshift-space 2PCF.
Keywordgravitational lensing: weak methods: analytical methods: statistical galaxies: haloes dark matter large-scale structure of Universe
Funding OrganizationU.S. Department of Energy ; U.S. Department of Energy ; Harvard University through the ITC Fellowship ; Harvard University through the ITC Fellowship ; National Science Foundation of China ; National Science Foundation of China ; U.S. Department of Energy ; U.S. Department of Energy ; Harvard University through the ITC Fellowship ; Harvard University through the ITC Fellowship ; National Science Foundation of China ; National Science Foundation of China ; U.S. Department of Energy ; U.S. Department of Energy ; Harvard University through the ITC Fellowship ; Harvard University through the ITC Fellowship ; National Science Foundation of China ; National Science Foundation of China ; U.S. Department of Energy ; U.S. Department of Energy ; Harvard University through the ITC Fellowship ; Harvard University through the ITC Fellowship ; National Science Foundation of China ; National Science Foundation of China
DOI10.1093/mnras/stab235
WOS KeywordHALO OCCUPATION DISTRIBUTION ; OSCILLATION SPECTROSCOPIC SURVEY ; DARK-MATTER ; MASS FUNCTIONS ; DEPENDENCE ; MODELS ; CONSTRAINTS ; ACCRETION ; PHYSICS
Language英语
Funding ProjectU.S. Department of Energy[DE-SC0013718] ; Harvard University through the ITC Fellowship ; National Science Foundation of China[11773049] ; National Science Foundation of China[11833005] ; National Science Foundation of China[11828302] ; National Science Foundation of China[11922305]
Funding OrganizationU.S. Department of Energy ; U.S. Department of Energy ; Harvard University through the ITC Fellowship ; Harvard University through the ITC Fellowship ; National Science Foundation of China ; National Science Foundation of China ; U.S. Department of Energy ; U.S. Department of Energy ; Harvard University through the ITC Fellowship ; Harvard University through the ITC Fellowship ; National Science Foundation of China ; National Science Foundation of China ; U.S. Department of Energy ; U.S. Department of Energy ; Harvard University through the ITC Fellowship ; Harvard University through the ITC Fellowship ; National Science Foundation of China ; National Science Foundation of China ; U.S. Department of Energy ; U.S. Department of Energy ; Harvard University through the ITC Fellowship ; Harvard University through the ITC Fellowship ; National Science Foundation of China ; National Science Foundation of China
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000648998800029
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/77642
Collection中国科学院国家天文台
Corresponding AuthorYuan, Sihan
Affiliation1.Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA
2.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
Recommended Citation
GB/T 7714
Yuan, Sihan,Hadzhiyska, Boryana,Bose, Sownak,et al. Evidence for galaxy assembly bias in BOSS CMASS redshift-space galaxy correlation function[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,502(3):3582-3598.
APA Yuan, Sihan,Hadzhiyska, Boryana,Bose, Sownak,Eisenstein, Daniel J.,&Guo, Hong.(2021).Evidence for galaxy assembly bias in BOSS CMASS redshift-space galaxy correlation function.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,502(3),3582-3598.
MLA Yuan, Sihan,et al."Evidence for galaxy assembly bias in BOSS CMASS redshift-space galaxy correlation function".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 502.3(2021):3582-3598.
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