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论文类型：期刊论文

发表时间：2015-02-11

发表刊物：JOURNAL OF HIGH ENERGY PHYSICS

收录刊物：SCIE、Scopus

卷号：2015

期号：2

页面范围：1-26

ISSN号：1029-8479

关键字：Cosmology of Theories beyond the SM; Classical Theories of Gravity

摘要：In this paper, we study cosmologies containing the reduced modified Chaplygin gas (RMCG) fluid which is reduced from the modified Chaplygin gas p = A rho - B rho(-alpha) for the value of alpha = -1/2. In this special case, dark cosmological models can be realized for different values of model parameter A. We investigate the viabilities of these dark cosmological models by discussing the evolutions of cosmological quantities and using the currently available cosmic observations. It is shown that the special RMCG model (A = 0 or A = 1) which unifies the dark matter and dark energy should be abandoned. For A = 1/3, RMCG which unifies the dark energy and dark radiation is the favorite model according to the objective Akaike information criteria. In the case of A < 0, RMCG can achieve the features of the dynamical quintessence and phantom models, where the evolution of the universe is not sensitive to the variation of model parameters.