ITP OpenIR  > 理论物理所2012年知识产出
Rip/singularity free cosmology models with bulk viscosity
Meng, XH; Ma, ZY; Meng, XH (reprint author), Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
2012
发表期刊EUROPEAN PHYSICAL JOURNAL C
ISSN1434-6044
卷号72期号:7页码:2053
摘要In this paper we present two concrete models of non-perfect fluid with bulk viscosity to interpret the observed cosmic accelerating expansion phenomena, avoiding the introduction of exotic dark energy. The first model we inspect has a viscosity of the form zeta = zeta 0 + (zeta(1) -zeta(2)q) H by taking into account the decelerating parameter q, and the other model is of the form zeta = zeta(0) + zeta H-1 + zeta H-2(2). We give the exact solutions of such models and further constrain them with the latest Union2 data as well as the currently observed Hubble-parameter dataset (OHD). Then we discuss the fate of universe evolution in these models, which confronts neither future singularity nor little/pseudo rip. From the resulting curves by best-fittings we find a much more flexible evolution processing due to the presence of viscosity while being consistent with the observational data in the region of data fitting. With the bulk viscosity considered, a more realistic universe scenario is characterized comparable with the Lambda CDM model but without introducing the mysterious dark energy.
部门归属[Meng, Xin-he; Ma, Zhi-yuan] Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China; [Meng, Xin-he] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
关键词Equation-of-state Palatini Formulation Dark Energy R-1-modified Gravity Friedmann Cosmology Viscous Cosmology Scalar Field Universe Constant Supernovae
学科领域Physics
资助者Natural Science Foundation of China [11075078, 10675062]; project of knowledge Innovation Program (PKIP) of Chinese Academy of Sciences (CAS) through the KITPC [KJCX2.YW.W10] ; Natural Science Foundation of China [11075078, 10675062]; project of knowledge Innovation Program (PKIP) of Chinese Academy of Sciences (CAS) through the KITPC [KJCX2.YW.W10] ; Natural Science Foundation of China [11075078, 10675062]; project of knowledge Innovation Program (PKIP) of Chinese Academy of Sciences (CAS) through the KITPC [KJCX2.YW.W10] ; Natural Science Foundation of China [11075078, 10675062]; project of knowledge Innovation Program (PKIP) of Chinese Academy of Sciences (CAS) through the KITPC [KJCX2.YW.W10]
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收录类别SCI
语种英语
资助者Natural Science Foundation of China [11075078, 10675062]; project of knowledge Innovation Program (PKIP) of Chinese Academy of Sciences (CAS) through the KITPC [KJCX2.YW.W10] ; Natural Science Foundation of China [11075078, 10675062]; project of knowledge Innovation Program (PKIP) of Chinese Academy of Sciences (CAS) through the KITPC [KJCX2.YW.W10] ; Natural Science Foundation of China [11075078, 10675062]; project of knowledge Innovation Program (PKIP) of Chinese Academy of Sciences (CAS) through the KITPC [KJCX2.YW.W10] ; Natural Science Foundation of China [11075078, 10675062]; project of knowledge Innovation Program (PKIP) of Chinese Academy of Sciences (CAS) through the KITPC [KJCX2.YW.W10]
WOS记录号WOS:000307269400002
引用统计
被引频次:10[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/311006/15067
专题理论物理所2012年知识产出
通讯作者Meng, XH (reprint author), Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
推荐引用方式
GB/T 7714
Meng, XH,Ma, ZY,Meng, XH . Rip/singularity free cosmology models with bulk viscosity[J]. EUROPEAN PHYSICAL JOURNAL C,2012,72(7):2053.
APA Meng, XH,Ma, ZY,&Meng, XH .(2012).Rip/singularity free cosmology models with bulk viscosity.EUROPEAN PHYSICAL JOURNAL C,72(7),2053.
MLA Meng, XH,et al."Rip/singularity free cosmology models with bulk viscosity".EUROPEAN PHYSICAL JOURNAL C 72.7(2012):2053.
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