Confronting dark energy anisotropic stress

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	Confronting dark energy anisotropic stress
	Chang, BR ; Xu, LX
刊名	PHYSICAL REVIEW D
	2014
卷号	90 期号:2 页码:27301
关键词	BARYON ACOUSTIC-OSCILLATIONS HUBBLE CONSTANT GROWTH-RATE GALAXY MATTER
ISSN号	1550-7998
通讯作者	Xu, LX (reprint author), Dalian Univ Technol, Sch Phys & Optoelect Technol, Inst Theoret Phys, Dalian 116024, Peoples R China.
英文摘要	We use currently available cosmic observations to probe and constrain an imperfect dark-energy fluid that is characterized by a constant equation of state w and a constant speed of viscosity c(vis)(2). The model parameter space was scanned using the Markov chain Monte Carlo method. The results show that the speed of viscosity c(vis)(2) was not well constrained when currently available data sets are used (including the cosmic microwave background radiation from Planck-2013 and WMAP9, type Ia supernovae, baryon acoustic oscillations, redshift space distortion f sigma(8)(z), and gravitational weak lensing from Canada-France Hawaii Telescope Lensing Survey (CFHTLenS). However, the cosmic data sets slightly favor phantom dark energy with a negative speed of viscosity c(vis)(2).
学科主题	Physics
收录类别	SCI
资助信息	NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01]
原文出处	http://dx.doi.org/10.1103/PhysRevD.90.027301
语种	英语
WOS记录号	WOS:000338500300007
公开日期	2015-06-03
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15714]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Chang, BR,Xu, LX. Confronting dark energy anisotropic stress[J]. PHYSICAL REVIEW D,2014,90(2):27301.
APA	Chang, BR,&Xu, LX.(2014).Confronting dark energy anisotropic stress.PHYSICAL REVIEW D,90(2),27301.
MLA	Chang, BR,et al."Confronting dark energy anisotropic stress".PHYSICAL REVIEW D 90.2(2014):27301.