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Unification of Dark Matter and Dark Energy in a Modified Entropic Force Model
Chang, Z; Li, MH; Li, X; Chang, Z (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
2011
发表期刊COMMUNICATIONS IN THEORETICAL PHYSICS
ISSN0253-6102
卷号56期号:1页码:184-192
摘要In Verlinde's entropic force scenario of gravity, Newton's laws and Einstein equations can be obtained from the first principles and general assumptions. However, the equipartition law of energy is invalid at very low temperatures. We show clearly that the threshold of the equipartition law of energy is related with horizon of the universe. Thus, a one-dimensional Debye (ODD) model in the direction of radius of the modified entropic force (MEF) may be suitable in description of the accelerated expanding universe. We present a Friedmann cosmic dynamical model in the ODD-MEF framework. We examine carefully constraints on the ODD-MEF model from the Union2 compilation of the Supernova Cosmology Project (SCP) collaboration, the data from the observation of the large-scale structure (LSS) and the cosmic microwave background (CMB), i.e. SNe Ia+LSS+CMB. The combined numerical analysis gives the best-fit value of the model parameters zeta similar or equal to 10(-9) and Omega(m0) = 0.224, with chi(2)(min) = 591.156. The corresponding age of the universe agrees with the result of D. Spergel et al. [J.M. Bardeen, B. Carter, and S.W. Hawking, Commun. Math. Phys. 31 (1973) 161] at 95% confidence level. The numerical result also yields an accelerated expanding universe without invoking any kind of dark energy. Taking zeta( 2 pi omega(D)/H-0) as a running parameter associated with the structure scale r, we obtain a possible unified scenario of the asymptotic flatness of the radial velocity dispersion of spiral galaxies, the accelerated expanding universe and the Pioneer 10/11 anomaly in the entropic force framework of Verlinde.
部门归属[Chang Zhe; Li Ming-Hua] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China; [Chang Zhe; Li Ming-Hua; Li Xin] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China; [Li Xin] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
关键词Black-hole Galaxies Constraints Range Laws
学科领域Physics
资助者National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129]
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收录类别SCI
语种英语
资助者National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129] ; National Natural Science Foundation of China [10525522, 10875129]
WOS记录号WOS:000293099700032
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被引频次:1[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/311006/14318
专题理论物理所SCI论文
通讯作者Chang, Z (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
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Chang, Z,Li, MH,Li, X,et al. Unification of Dark Matter and Dark Energy in a Modified Entropic Force Model[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2011,56(1):184-192.
APA Chang, Z,Li, MH,Li, X,&Chang, Z .(2011).Unification of Dark Matter and Dark Energy in a Modified Entropic Force Model.COMMUNICATIONS IN THEORETICAL PHYSICS,56(1),184-192.
MLA Chang, Z,et al."Unification of Dark Matter and Dark Energy in a Modified Entropic Force Model".COMMUNICATIONS IN THEORETICAL PHYSICS 56.1(2011):184-192.
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