Running cosmological constant with observational tests

被引：11

作者：

Geng, Chao-Qiang ^{[1
,2
,3
]}

Lee, Chung-Chi ^{[2
]}

Zhang, Kaituo ^{[2
,4
]}

机构：

[1] Chongqing Univ Posts & Telecommun, Chongqing 400065, Peoples R China

[2] Natl Ctr Theoret Sci, Hsinchu 300, Taiwan

[3] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan

[4] Anhui Normal Univ, Wuhu 24100, Anhui, Peoples R China

来源：

PHYSICS LETTERS B | 2016年 / 760卷

基金：

中国国家自然科学基金;

关键词：

BARYON ACOUSTIC-OSCILLATIONS; DECAYING VACUUM ENERGY; DARK ENERGY; DEFLATIONARY COSMOLOGY; LAMBDA;

D O I：

10.1016/j.physletb.2016.07.026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the running cosmological constant model with dark energy linearly proportional to the Hubble parameter, Lambda = sigma H + Lambda(0), in which the Lambda CDM limit is recovered by taking sigma = 0. We derive the linear perturbation equations of gravity under the Friedmann-Lemaitre-Robertson-Walker cosmology, and show the power spectra of the CMB temperature and matter density distribution. By using the Markov chain Monte Carlo method, we fit the model to the current observational data and find that sigma H-0/Lambda(0) less than or similar to 2.63 x 10(-2) and 6.74 x 10(-2) for Lambda(t) coupled to matter and radiation-matter, respectively, along with constraints on other cosmological parameters. (C) 2016 The Author(s). Published by Elsevier B.V.

引用

页码：422 / 427

页数：6

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