ITP OpenIR  > 理论物理所科研产出  > SCI论文
Velten, H; Wang, JX; Meng, XH; Velten, H (reprint author), Univ Fed Espirito Santo, Dept Fs, BR-29060900 Vitoria, Espirito Santo, Brazil.
Phantom dark energy as an effect of bulk viscosity
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordBaryon Acoustic-oscillations Probe Wmap Observations Cosmological Constant Problem Digital Sky Survey Driven Inflationary Viscous Cosmology Models Universe Thermodynamics Parameters
AbstractIn a homogeneous and isotropic universe bulk viscosity is the unique viscous effect that is capable of modifying the background dynamics. Effects like shear viscosity or heat conduction can only change the evolution of the perturbations. The existence of a bulk viscous pressure in a fluid-which in order to obey the second law of thermodynamics must be negative-reduces its effective pressure. We discuss the degeneracy in bulk viscous cosmologies and address the possibility that phantom dark energy cosmology could be caused by the existence of nonequilibrium pressure in any one of the cosmic components. We establish the conditions under which either viscous matter or radiation cosmologies can be mapped into the phantom dark energy scenario with constraints from multiple observational data sets.
2013
ISSN1550-7998
Volume88Issue:12Pages:123504
Subject AreaPhysics
Indexed BySCI
Funding OrganizationCNPq; Natural Science Foundation of China [11075078, 10675062]; Chinese Academy of Sciences (CAS) [KJCX2.YW.W10] ; CNPq; Natural Science Foundation of China [11075078, 10675062]; Chinese Academy of Sciences (CAS) [KJCX2.YW.W10] ; CNPq; Natural Science Foundation of China [11075078, 10675062]; Chinese Academy of Sciences (CAS) [KJCX2.YW.W10] ; CNPq; Natural Science Foundation of China [11075078, 10675062]; Chinese Academy of Sciences (CAS) [KJCX2.YW.W10]
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Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15212
Collection理论物理所科研产出_SCI论文
Corresponding AuthorVelten, H (reprint author), Univ Fed Espirito Santo, Dept Fs, BR-29060900 Vitoria, Espirito Santo, Brazil.
Recommended Citation
GB/T 7714
Velten, H,Wang, JX,Meng, XH,et al. Phantom dark energy as an effect of bulk viscosity[J]. PHYSICAL REVIEW D,2013,88(12):123504.
APA Velten, H,Wang, JX,Meng, XH,&Velten, H .(2013).Phantom dark energy as an effect of bulk viscosity.PHYSICAL REVIEW D,88(12),123504.
MLA Velten, H,et al."Phantom dark energy as an effect of bulk viscosity".PHYSICAL REVIEW D 88.12(2013):123504.
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