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Li, XD; Park, C; Sabiu, CG; Park, H; Cheng, C; Kim, J; Hong, SE; Sabiu, CG (reprint author), Korea Astron & Space Sci Inst, Daejeon 305348, South Korea.
Cosmological Constraints from the Redshift Dependence of the Volume Effect Using the Galaxy 2-point Correlation Function across the Line of Sight
Source PublicationASTROPHYSICAL JOURNAL
Language英语
KeywordCosmological Parameters Dark Energy Large-scale Structure Of Universe
AbstractWe develop a methodology to use the redshift dependence of the galaxy 2-point correlation function (2pCF) across the line of sight, xi(r(perpendicular to)), as a probe of cosmological parameters. The positions of galaxies in comoving Cartesian space varies under different cosmological parameter choices, inducing a redshift-dependent scaling in the galaxy distribution. This geometrical distortion can be observed as a redshift-dependent rescaling in the measured xi(r(perpendicular to)). We test this methodology using a sample of 1.75 billion mock galaxies at redshifts 0, 0.5, 1, 1.5, and 2, drawn from the Horizon Run 4 N-body simulation. The shape of xi(r(perpendicular to)) can exhibit a significant redshift evolution when the galaxy sample is analyzed under a cosmology differing from the true, simulated one. Other contributions, including the gravitational growth of structure, galaxy bias, and the redshift space distortions, do not produce large redshift evolution in the shape. We show that one can make use of this geometrical distortion to constrain the values of cosmological parameters governing the expansion history of the universe. This method could be applicable to future large-scale structure surveys, especially photometric surveys such as DES and LSST, to derive tight cosmological constraints. This work is a continuation of our previous works as a strategy to constrain cosmological parameters using redshift-invariant physical quantities.
2017
Volume844Issue:2Pages:91
Subject AreaAstronomy & Astrophysics
DOIhttp://dx.doi.org/10.3847/1538-4357/aa7cfc
Funding OrganizationNational Research Foundation (NRF) [2017R1D1A1B03034900] ; National Research Foundation (NRF) [2017R1D1A1B03034900] ; National Research Foundation (NRF) [2017R1D1A1B03034900] ; National Research Foundation (NRF) [2017R1D1A1B03034900] ; Supercomputing Center/Korea Institute of Science and Technology Information ; Supercomputing Center/Korea Institute of Science and Technology Information ; Supercomputing Center/Korea Institute of Science and Technology Information ; Supercomputing Center/Korea Institute of Science and Technology Information
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/22001
Collection理论物理所科研产出_SCI论文
Corresponding AuthorSabiu, CG (reprint author), Korea Astron & Space Sci Inst, Daejeon 305348, South Korea.
Recommended Citation
GB/T 7714
Li, XD,Park, C,Sabiu, CG,et al. Cosmological Constraints from the Redshift Dependence of the Volume Effect Using the Galaxy 2-point Correlation Function across the Line of Sight[J]. ASTROPHYSICAL JOURNAL,2017,844(2):91.
APA Li, XD.,Park, C.,Sabiu, CG.,Park, H.,Cheng, C.,...&Sabiu, CG .(2017).Cosmological Constraints from the Redshift Dependence of the Volume Effect Using the Galaxy 2-point Correlation Function across the Line of Sight.ASTROPHYSICAL JOURNAL,844(2),91.
MLA Li, XD,et al."Cosmological Constraints from the Redshift Dependence of the Volume Effect Using the Galaxy 2-point Correlation Function across the Line of Sight".ASTROPHYSICAL JOURNAL 844.2(2017):91.
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