MAPPING THE REAL-SPACE DISTRIBUTIONS OF GALAXIES IN SDSS DR7. I. TWO-POINT CORRELATION FUNCTIONS

doi:10.3847/1538-4357/833/2/241

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	MAPPING THE REAL-SPACE DISTRIBUTIONS OF GALAXIES IN SDSS DR7. I. TWO-POINT CORRELATION FUNCTIONS
	Shi,Feng 2,4; Yang,Xiaohu 5,6; Wang,Huiyuan 7; Zhang,Youcai 2; Mo,H. J.1,8; van den Bosch,Frank C.3; Li,Shijie 2; Liu,Chengze 5; Lu,Yi 2; Tweed,Dylan 5
刊名	The Astrophysical Journal
	2016-12-20
卷号	833 期号:2
关键词	dark matter galaxies: halos large-scale structure of universe methods: statistical
ISSN号	0004-637X
DOI	10.3847/1538-4357/833/2/241
英文摘要	ABSTRACT Using a method to correct redshift-space distortion (RSD) for individual galaxies, we mapped the real-space distributions of galaxies in the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7). We use an ensemble of mock catalogs to demonstrate the reliability of our method. Here, in the first paper in a series, we focus mainly on the two-point correlation function (2PCF) of galaxies. Overall the 2PCF measured in the reconstructed real space for galaxies brighter than agrees with the direct measurement to an accuracy better than the measurement error due to cosmic variance, if the reconstruction uses the correct cosmology. Applying the method to the SDSS DR7, we construct a real-space version of the main galaxy catalog, which contains 396,068 galaxies in the North Galactic Cap with redshifts in the range 0.01?≤?z?≤?0.12. The Sloan Great Wall, the largest known structure in the nearby universe, is not as dominant an overdense structure as it appears to be in redshift space. We measure the 2PCFs in reconstructed real space for galaxies of different luminosities and colors. All of them show clear deviations from single power-law forms, and reveal clear transitions from one-halo to two-halo terms. A comparison with the corresponding 2PCFs in redshift space nicely demonstrates how RSDs boost the clustering power on large scales (by about 40%–50% at scales ) and suppress it on small scales (by about 70%–80% on a scale of ).
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-833-2-241
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32179]
专题	中国科学院上海天文台
作者单位	1.Physics Department and Center for Astrophysics, Tsinghua University, Beijing 10084, China 2.Shanghai Astronomical Observatory, Nandan Road 80, Shanghai 200030, China; sfeng@shao.ac.cn 3.Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101, USA 4.University of Chinese Academy of Sciences, 19A, Yuquan Road, Beijing, China 5.Center for Astronomy and Astrophysics, Shanghai Jiao Tong University, Shanghai 200240, China; xyang@sjtu.edu.cn 6.IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China 7.Key Laboratory for Research in Galaxies and Cosmology, University of Science and Technology of China, Hefei, Anhui 230026, China 8.Department of Astronomy, University of Massachusetts, Amherst, MA 01003-9305, USA
推荐引用方式 GB/T 7714	Shi,Feng,Yang,Xiaohu,Wang,Huiyuan,et al. MAPPING THE REAL-SPACE DISTRIBUTIONS OF GALAXIES IN SDSS DR7. I. TWO-POINT CORRELATION FUNCTIONS[J]. The Astrophysical Journal,2016,833(2).
APA	Shi,Feng.,Yang,Xiaohu.,Wang,Huiyuan.,Zhang,Youcai.,Mo,H. J..,...&Yang,Lei.(2016).MAPPING THE REAL-SPACE DISTRIBUTIONS OF GALAXIES IN SDSS DR7. I. TWO-POINT CORRELATION FUNCTIONS.The Astrophysical Journal,833(2).
MLA	Shi,Feng,et al."MAPPING THE REAL-SPACE DISTRIBUTIONS OF GALAXIES IN SDSS DR7. I. TWO-POINT CORRELATION FUNCTIONS".The Astrophysical Journal 833.2(2016).