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题名: Smoothing the redshift distributions of random samples for the baryon acoustic oscillations: applications to the SDSS-III BOSS DR12 and QPM mock samples
作者: Wang, SJ ;  Guo, Q ;  Cai, RG
刊名: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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
学科分类: Astronomy & Astrophysics
DOI: http://dx.doi.org/10.1093/mnras/stx2183
通讯作者: 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. ;  Wang, SJ ;  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), 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.
文章类型: Article
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.
类目[WOS]: Astronomy & Astrophysics
关键词[WOS]: LUMINOUS RED GALAXIES ;  DIGITAL SKY SURVEY ;  POWER-SPECTRUM ANALYSIS ;  MEASURING D-A ;  DISTANCE ;  SCALE ;  PEAK ;  H(Z) ;  CONSTANT ;  D-A(Z)
项目资助者: Newton Advanced Fellowship ;  NSFC [11573033, 11622325] ;  Strategic Priority Research Program 'The Emergence of Cosmological Structure' of the Chinese Academy of Sciences [XDB09000000] ;  'Recruitment Program of Global Youth Experts'of China ;  NAOC grant [Y434011V01] ;  Strategic Priority Research Program of the Chinese Academy of Science (CAS) [XDB09000000] ;  key project of CAS [QYZDJ-SSW-SYS006] ;  National Natural Science Foundation of China [11375247, 11435006]
语种: 英语
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内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21925
Appears in Collections:理论物理所2017年知识产出_期刊论文

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Recommended Citation:
Wang, SJ,Guo, Q,Cai, RG. 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.
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