The effect of large-scale structure on the SDSS galaxy three-point correlation function

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 毫米波和亚毫米波技术实验室

	The effect of large-scale structure on the SDSS galaxy three-point correlation function
	Nichol, R. C.; Sheth, R. K.; Suto, Y.; Gray, A. J.; Kayo, I.; Wechsler, R. H.; Marin, F.; Kulkarni, G.; Blanton, M.; Connolly, A. J.
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2006-06-01
卷号	368 期号:4 页码:1507-1514
关键词	methods : statistical surveys galaxies : statistics cosmology : observations large-scale structure of Universe
ISSN号	0035-8711
英文摘要	We present measurements of the normalized redshift-space three-point correlation function (3PCF) (Q(z)) of galaxies from the Sloan Digital Sky Survey (SDSS) main galaxy sample. These measurements were possible because of a fast new N-point correlation function algorithm (called npt) based on multiresolutional k-d trees. We have applied npt to both a volume-limited (36 738 galaxies with 0.05 <= z <= 0.095 and -23 <= M(0.0)r <=-20.5) and magnitude-limited sample (134 741 galaxies over 0.05 <= z <= 0.17 and similar to M*+/- 1.5) of SDSS galaxies, and find consistent results between the two samples, thus confirming the weak luminosity dependence of Q(z) recently seen by other authors. We compare our results to other Q(z) measurements in the literature and find it to be consistent within the full jackknife error estimates. However, we find these errors are significantly increased by the presence of the 'Sloan Great Wall' (at z similar to 0.08) within these two SDSS data sets, which changes the 3PCF by 70 per cent on large scales (s >= 10 h(-1)Mpc). If we exclude this supercluster, our observed Q(z) is in better agreement with that obtained from the 2-degree Field Galaxy Redshift Survey (2dFGRS) by other authors, thus demonstrating the sensitivity of these higher order correlation functions to large-scale structures in the Universe. This analysis highlights that the SDSS data sets used here are not 'fair samples' of the Universe for the estimation of higher order clustering statistics and larger volumes are required. We study the shape dependence of Q(z)(s, q, theta) as one expects this measurement to depend on scale if the large-scale structure in the Universe has grown via gravitational instability from Gaussian initial conditions. On small scales (s <= 6 h(-1)Mpc), we see some evidence for shape dependence in Q(z), but at present our measurements are consistent with a constant within the errors (Q(z)similar or equal to 0.75 +/- 0.05). On scales > 10 h(-1)Mpc, we see considerable shape dependence in Q(z). However, larger samples are required to improve the statistical significance of these measurements on all scales.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	DIGITAL SKY SURVEY ; REDSHIFT SURVEY ; LUMINOSITY DEPENDENCE ; STATISTICAL-ANALYSIS ; UNIVERSE ; BISPECTRUM ; CATALOGS ; COUNTS ; SYSTEM ; SPACE
收录类别	SCI
语种	英语
WOS记录号	WOS:000237812700003
公开日期	2012-02-07
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/3546]
专题	紫金山天文台_毫米波和亚毫米波技术实验室
作者单位	1.Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15217 USA 2.Univ Penn, Dept Phys & Astron, Philadelphia, PA 15105 USA 3.Univ Tokyo, Dept Phys, Sch Sci, Tokyo 1130033, Japan 4.Carnegie Mellon Univ, Sch Comp Sci, Pittsburgh, PA 15217 USA 5.Nagoya Univ, Dept Phys & Astrophys, Chikusa Ku, Nagoya, Aichi 4648602, Japan 6.Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA 7.NYU, Dept Phys, Ctr Cosmol & Particle Phys, New York, NY 10003 USA 8.Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA 9.Pittsburgh Supercomp Ctr, Pittsburgh, PA 15213 USA 10.Natl Opt Astron Observ, Cerro Tololo Inter Amer Observ, La Serena, Chile
推荐引用方式 GB/T 7714	Nichol, R. C.,Sheth, R. K.,Suto, Y.,et al. The effect of large-scale structure on the SDSS galaxy three-point correlation function[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2006,368(4):1507-1514.
APA	Nichol, R. C..,Sheth, R. K..,Suto, Y..,Gray, A. J..,Kayo, I..,...&Brinkmann, J..(2006).The effect of large-scale structure on the SDSS galaxy three-point correlation function.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,368(4),1507-1514.
MLA	Nichol, R. C.,et al."The effect of large-scale structure on the SDSS galaxy three-point correlation function".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 368.4(2006):1507-1514.