An information theory based search for homogeneity on the largest accessible scale

被引：15

作者：

Sarkar, Suman ^{[1
]}

Pandey, Biswajit ^{[1
]}

机构：

[1] Visva Bharati Univ, Dept Phys, Santini Ketan 731235, Birbhum, India

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 463卷 / 01期

关键词：

methods: data analysis; methods: statistical; large-scale structure of Universe; DIGITAL-SKY-SURVEY; COSMIC HOMOGENEITY; TESTING HOMOGENEITY; GALAXY DISTRIBUTION; FRACTAL STRUCTURE; TARGET SELECTION; DARK ENERGY; UNIVERSE; ISOTROPY; QUASARS;

D O I：

10.1093/mnrasl/slw145

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyse the Sloan Digital Sky Survey Data Release 12 quasar catalogue to test the large-scale smoothness in the quasar distribution. We quantify the degree of inhomogeneity in the quasar distribution using information theory based measures and find that the degree of inhomogeneity diminishes with increasing length scales which finally reach a plateau at similar to 250 h(-1) Mpc. The residual inhomogeneity at the plateau is consistent with that expected for a Poisson point process. Our results indicate that the quasar distribution is homogeneous beyond length scales of 250 h(-1) Mpc.

引用

页码：L12 / L16

页数：5

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