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题名: Confronting dark energy anisotropic stress
作者: Chang, BR ;  Xu, LX
刊名: PHYSICAL REVIEW D
出版日期: 2014
卷号: 90, 期号:2, 页码:27301
关键词: BARYON ACOUSTIC-OSCILLATIONS ;  HUBBLE CONSTANT ;  GROWTH-RATE ;  GALAXY ;  MATTER
学科分类: Physics
DOI: 10.1103/PhysRevD.90.027301
通讯作者: Xu, LX (reprint author), Dalian Univ Technol, Sch Phys & Optoelect Technol, Inst Theoret Phys, Dalian 116024, Peoples R China.
部门归属: [Chang, Baorong ;  Xu, Lixin] Dalian Univ Technol, Sch Phys & Optoelect Technol, Inst Theoret Phys, Dalian 116024, Peoples R China ;  [Xu, Lixin] Dalian Univ Technol, Coll Adv Sci & Technol, Dalian 116024, Peoples R China ;  [Xu, Lixin] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, 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).
资助者: NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000338500300007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15714
Appears in Collections:理论物理所2014年知识产出 _期刊论文

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Recommended Citation:
Chang, BR,Xu, LX. Confronting dark energy anisotropic stress[J]. PHYSICAL REVIEW D,2014,90(2):27301.
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