ITP OpenIR  > 理论物理所科研产出  > SCI论文
Chang, Z; Li, MH; Li, X; Chang, Z (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
Unification of Dark Matter and Dark Energy in a Modified Entropic Force Model
Source PublicationCOMMUNICATIONS IN THEORETICAL PHYSICS
Language英语
KeywordBlack-hole Galaxies Constraints Range Laws
AbstractIn 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.
2011
ISSN0253-6102
Volume56Issue:1Pages:184-192
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational 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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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/14318
Collection理论物理所科研产出_SCI论文
Corresponding AuthorChang, Z (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
Recommended Citation
GB/T 7714
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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