Probing dark energy in the scope of a Bianchi type I spacetime

被引：32

作者：

Amirhashchi, Hassan ^{[1
]}

机构：

[1] Islamic Azad Univ, Mahshahr Branch, Dept Phys, Mahshahr 6351977439, Iran

来源：

PHYSICAL REVIEW D | 2018年 / 97卷 / 06期

关键词：

MEDIAN STATISTICS; COSMOLOGICAL CONSTANT; UNIVERSE; SEARCH;

D O I：

10.1103/PhysRevD.97.063515

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is well known that the flat Friedmann-Robertson-Walker metric is a special case of Bianchi type I spacetime. In this paper, we use 38 Hubble parameter, H(z), measurements at intermediate redshifts 0.07 <= z <= 2.36 and its joint combination with the latest "joint light curves" (JLA) sample, comprising 740 type Ia supernovae in the redshift range of z epsilon[0.01, 1.30] to constrain the parameters of the Bianchi type I dark energy model. We also use the same datasets to constrain flat a Lambda CDM model. In both cases, we specifically address the expansion rate H-0 as well as the transition redshift z(t) determinations out of these measurements. In both models, we found that using joint combination of datasets gives rise to lower values for model parameters. Also to compare the considered cosmologies, we have made Akaike information criterion and Bayes factor (Psi) tests.

引用

页数：9

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