Homogeneity and isotropy in the Two Micron All Sky Survey Photometric Redshift catalogue

被引：65

作者：

Alonso, D. ^{[1
]}

Salvador, A. I. ^{[2
]}

Sanchez, F. J. ^{[3
]}

Bilicki, M. ^{[4
,5
]}

Garcia-Bellido, J. ^{[2
]}

Sanchez, E. ^{[3
]}

机构：

[1] Univ Oxford, Oxford OX1 3RH, England

[2] UAM, CSICC, Inst Fis Teor, E-28049 Madrid, Spain

[3] CIEMAT, E-28040 Madrid, Spain

[4] Univ Cape Town, Dept Astron, Astrophys Cosmol & Grav Ctr ACGC, ZA-7701 Rondebosch, South Africa

[5] Univ Zielona Gora, Kepler Inst Astron, PL-65516 Zielona Gora, Poland

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2015年 / 449卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

cosmology: observations; large-scale structure of Universe; HEMISPHERICAL POWER ASYMMETRY; BARYON ACOUSTIC-OSCILLATIONS; LARGE-SCALE STRUCTURE; DARK ENERGY SURVEY; GALAXY DISTRIBUTION; COSMIC HOMOGENEITY; CLUSTERING DIPOLE; LOCAL UNIVERSE; SPECTRUM; MODEL;

D O I：

10.1093/mnras/stv309

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using the Two Micron All Sky Survey Photometric Redshift catalogue we perform a number of statistical tests aimed at detecting possible departures from statistical homogeneity and isotropy in the large-scale structure of the Universe. Making use of the angular homogeneity index, an observable proposed in a previous publication, as well as studying the scaling of the angular clustering and number counts with magnitude limit, we place constraints on the fractal nature of the galaxy distribution. We find that the statistical properties of our sample are in excellent agreement with the standard cosmological model, and that it reaches the homogeneous regime significantly faster than a class of fractal models with dimensions D < 2.75. As part of our search for systematic effects, we also study the presence of hemispherical asymmetries in our data, finding no significant deviation beyond those allowed by the concordance model.

引用

页码：670 / 684

页数：15

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