Smoothing the redshift distributions of random samples for the baryon acoustic oscillations: applications to the SDSS-III BOSS DR12 and QPM mock samples
文献类型：期刊论文
| 作者 | Cai, RG (reprint author), Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuqua Rd, Beijing 100049, Peoples R China.; Wang, SJ; Guo, Q; Cai, RG ; Cai, RG (reprint author), Chinese Acad Sci, CAS Key Lab Theoret Phys, Inst Theoret Phys, 55 Zhong Guan Cun East Rd, Beijing 100190, Peoples R China.; Cai, RG (reprint author), Kyoto Univ, Ctr Gravitat Phys, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan.; Guo, Q (reprint author), Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 10012, Peoples R China.; Guo, Q (reprint author), Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China.
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2017 |
| 卷号 | 472期号:3页码:2869-2876 |
| 关键词 | Galaxies: Statistics Galaxies: Structure Distance Scale Large-scale Structure Of Universe Cosmology: Observations |
| DOI | http://dx.doi.org/10.1093/mnras/stx2183 |
| 英文摘要 | We investigate the impact of different redshift distributions of random samples on the baryon acoustic oscillations (BAO) measurements of D-V(z)r(d)(fid)/r(d) from the two-point correlation functions of galaxies in the Data Release 12 of the Baryon Oscillation Spectroscopic Survey (BOSS). Big surveys, such as BOSS, usually assign redshifts to the random samples by randomly drawing values from the measured redshift distributions of the data, which would necessarily introduce fiducial signals of fluctuations into the random samples, weakening the signals of BAO, if the cosmic variance cannot be ignored. We propose a smooth function of redshift distribution that fits the data well to populate the random galaxy samples. The resulting cosmological parameters match the input parameters of the mock catalogue very well. The significance of BAO signals has been improved by 0.33 sigma for a low-redshift sample and by 0.03 sigma for a constant-stellar-mass sample, though the absolute values do not change significantly. Given the precision of the measurements of current cosmological parameters, it would be appreciated for the future improvements on the measurements of galaxy clustering. |
| 学科主题 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/21925]  |
| 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 | Cai, RG (reprint author), Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuqua Rd, Beijing 100049, Peoples R China.; Wang, SJ; Cai, RG (reprint author), Chinese Acad Sci, CAS Key Lab Theoret Phys, Inst Theoret Phys, 55 Zhong Guan Cun East Rd, Beijing 100190, Peoples R China.; Cai, RG (reprint author), Kyoto Univ, Ctr Gravitat Phys, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan.; Guo, Q (reprint author), Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 10012, Peoples R China.; Guo, Q (reprint author), Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Cai, RG ,Wang, SJ,Guo, Q,et al. Smoothing the redshift distributions of random samples for the baryon acoustic oscillations: applications to the SDSS-III BOSS DR12 and QPM mock samples[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,472(3):2869-2876. |
| APA | Cai, RG .,Wang, SJ.,Guo, Q.,Cai, RG.,Cai, RG .,...&Guo, Q .(2017).Smoothing the redshift distributions of random samples for the baryon acoustic oscillations: applications to the SDSS-III BOSS DR12 and QPM mock samples.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,472(3),2869-2876. |
| MLA | Cai, RG ,et al."Smoothing the redshift distributions of random samples for the baryon acoustic oscillations: applications to the SDSS-III BOSS DR12 and QPM mock samples".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 472.3(2017):2869-2876. |
入库方式： OAI收割
来源：理论物理研究所
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