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Chang, BR; Lu, JB; Xu, LX; Xu, LX (reprint author), Dalian Univ Technol, Sch Phys & Optoelect Technol, Inst Theoret Phys, Dalian 116024, Peoples R China.
Matter sourced anisotropic stress for dark energy
发表期刊PHYSICAL REVIEW D
语种英语
关键词Baryon Acoustic-oscillations Hubble Constant Growth-rate Galaxies
摘要Usually a dark energy as a perfect fluid is characterized by the ratio of pressure to energy density (w = p/rho) and the ratio of their perturbations in its rest frame (c(s)(2) = delta p/delta rho). However, a dark energy would have other characteristics beyond its equation of state and the effective speed of sound. Here the extra property is the anisotropic stress sourced by matter as a simple extension to the perfect fluid model. At the background level, this anisotropic stress is zero with respect to the cosmological principle, but not at the first-order perturbation. We tested the viability of the existence of this kind of anisotropic stress by using the currently available cosmic observations through the geometrical and dynamical measurements. Using the Markov-chain Monte Carlo method, we found that the upper bounds on the anisotropic stress which enters into the summation of the Newtonian potentials should be of the order O(10(-3))Delta(m). We did not find any strong evidence for the existence of this matter-sourced anisotropic stress, even in the 1 sigma region.
2014
ISSN1550-7998
卷号90期号:10页码:103528
学科领域Physics
DOI10.1103/PhysRevD.90.103528
收录类别SCI
项目资助者NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01]; Open Project Program of the State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF101CJ1] ; NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01]; Open Project Program of the State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF101CJ1] ; NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01]; Open Project Program of the State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF101CJ1] ; NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01]; Open Project Program of the State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF101CJ1]
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15564
专题理论物理所科研产出_SCI论文
通讯作者Xu, LX (reprint author), Dalian Univ Technol, Sch Phys & Optoelect Technol, Inst Theoret Phys, Dalian 116024, Peoples R China.
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Chang, BR,Lu, JB,Xu, LX,et al. Matter sourced anisotropic stress for dark energy[J]. PHYSICAL REVIEW D,2014,90(10):103528.
APA Chang, BR,Lu, JB,Xu, LX,&Xu, LX .(2014).Matter sourced anisotropic stress for dark energy.PHYSICAL REVIEW D,90(10),103528.
MLA Chang, BR,et al."Matter sourced anisotropic stress for dark energy".PHYSICAL REVIEW D 90.10(2014):103528.
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