THE GALAXY COUNTS-IN-CELLS DISTRIBUTION FROM THE SLOAN DIGITAL SKY SURVEY

被引：33

作者：

Yang, Abel ^{[1
]}

Saslaw, William C. ^{[1
,2
]}

机构：

[1] Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA

[2] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

来源：

ASTROPHYSICAL JOURNAL | 2011年 / 729卷 / 02期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

cosmology: theory; galaxies: statistics; gravitation; large-scale structure of universe; VELOCITY DISTRIBUTION; REDSHIFT SURVEY; ANGULAR MASKS; DATA RELEASE; SCALE; THERMODYNAMICS; FLUCTUATIONS; PROBABILITY; STATISTICS; EVOLUTION;

D O I：

10.1088/0004-637X/729/2/123

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We determine the galaxy counts-in-cells distribution from the Sloan Digital Sky Survey (SDSS) for three-dimensional spherical cells in redshift space as well as for two-dimensional projected cells. We find that cosmic variance in the SDSS causes the counts-in-cells distributions in different quadrants to differ from each other by up to 20%. We also find that within this cosmic variance, the overall galaxy counts-in-cells distribution agrees with both the gravitational quasi-equilibrium distribution and the negative binomial distribution. We also find that brighter galaxies are more strongly clustered than if they were randomly selected from a larger complete sample that includes galaxies of all luminosities. The results suggest that bright galaxies could be in dark matter halos separated by less than similar to 10 h(-1) Mpc.

引用

页数：16

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