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题名: Unification of Dark Matter and Dark Energy in a Modified Entropic Force Model
作者: Chang, Z ;  Li, MH ;  Li, X
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2011
卷号: 56, 期号:1, 页码:184-192
关键词: BLACK-HOLE ;  GALAXIES ;  CONSTRAINTS ;  RANGE ;  LAWS
学科分类: Physics
通讯作者: Chang, Z (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
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
英文摘要: 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.
资助者: National Natural Science Foundation of China [10525522, 10875129]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000293099700032
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14318
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Recommended Citation:
Chang, Z,Li, MH,Li, X. Unification of Dark Matter and Dark Energy in a Modified Entropic Force Model[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2011,56(1):184-192.
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