Consistency of the growth rate in different environments with the 6-degree Field Galaxy Survey: Measurement of the void-galaxy and galaxy-galaxy correlation functions

被引：54
作者：
Achitouv, I. [1 ,2 ]
Blake, C. [1 ,2 ]
Carter, P. [3 ]
Koda, J. [4 ]
Beutler, F. [3 ]
机构：
[1] Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Hawthorn, Vic 3122, Australia
[2] ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW, Australia
[3] Univ Portsmouth, Inst Cosmol & Gravitat, Dennis Sciama Bldg, Portsmouth PO1 3FX, Hants, England
[4] Univ Roma Tre, Dept Math & Phys, Via Vasca Navale 84, I-00146 Rome, Italy
来源：
PHYSICAL REVIEW D | 2017年 / 95卷 / 08期
基金：
澳大利亚研究理事会;
关键词：
BARYON ACOUSTIC-OSCILLATIONS; REDSHIFT-SPACE DISTORTIONS; COSMIC STRUCTURE FORMATION; POWER-SPECTRUM ANALYSIS; DARK ENERGY; PECULIAR VELOCITIES; MASS; GRAVITY; EVOLUTION; EXPANSION;
D O I：
10.1103/PhysRevD.95.083502
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a new test of gravitational physics by comparing the growth rate of cosmic structure measured around voids with that measured around galaxies in the same large-scale structure data set: the low-redshift 6-degree Field Galaxy Survey. By fitting a redshift space distortion model to the two-dimensional galaxy-galaxy and void-galaxy correlation functions, we recover the growth rate values f sigma(8) = 0.42 +/- 0.06 and 0.39 +/- 0.11, respectively. The environmental dependence of cosmological statistics can potentially discriminate between modified-gravity scenarios which modulate the growth rate as a function of scale or environment and test the underlying assumptions of homogeneity and isotropy.
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页数：11
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