Constraining the anisotropy of the universe from supernovae and gamma-ray bursts

被引：31

作者：

Chang, Zhe ^{[1
,2
]}

Li, Xin ^{[1
,2
]}

Lin, Hai-Nan ^{[1
]}

Wang, Sai ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[2] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China

来源：

MODERN PHYSICS LETTERS A | 2014年 / 29卷 / 15期

关键词：

Cosmology; anisotropy; supernovae; gamtiT y bursts; PROBE WMAP OBSERVATIONS; HUBBLE DIAGRAM; SPECIAL RELATIVITY; LAMBDA-CDM; MICROWAVE; REDSHIFT; DIPOLE; SPACETIME; SYMMETRY; GALAXIES;

D O I：

10.1142/S0217732314500679

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recently, an anisotropic cosmological model was proposed. An arbitrary one-form, which picks out a privileged axis in the universe, was added to the Friedmann Robertson Walker (FRW) line element. The distance-redshift relation was modified such that it is direction-dependent. In this paper, we use the Union2 dataset and 59 high-redshift gamma-ray bursts (C.:411Es) to give constraints on the anisotropy of the universe. The results show that the magnitude of anisotropy is about D = 0.044 0.018, and the privileged axis points toward the direction (to, ho) = (306.1" 18.7", 18.2" 11.2') in the galactic coordinate system. The anisotropy is small and the isotropic cosmological model is an excellent approximation.

引用

页数：10

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