Cosmological Constraints from the Redshift Dependence of the Volume Effect Using the Galaxy 2-point Correlation Function across the Line of Sight
文献类型：期刊论文
| 作者 | Park, H; Kim, J; Hong, SE; Sabiu, CG (reprint author), Korea Astron & Space Sci Inst, Daejeon 305348, South Korea.; Li, XD; Park, C; Sabiu, CG; Cheng, C |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2017 |
| 卷号 | 844期号:2页码:91 |
| 关键词 | Cosmological Parameters Dark Energy Large-scale Structure Of Universe |
| DOI | http://dx.doi.org/10.3847/1538-4357/aa7cfc |
| 英文摘要 | We 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. |
| 学科主题 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/22001]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Sabiu, CG (reprint author), Korea Astron & Space Sci Inst, Daejeon 305348, South Korea. |
| 推荐引用方式 GB/T 7714 | Park, H,Kim, J,Hong, SE,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 | Park, H.,Kim, J.,Hong, SE.,Sabiu, CG .,Li, XD.,...&Cheng, C.(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 | Park, H,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. |
入库方式： OAI收割
来源：理论物理研究所
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