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论文类型：期刊论文

发表时间：2012-02-01

发表刊物：EUROPEAN PHYSICAL JOURNAL C

收录刊物：SCIE、Scopus

卷号：72

期号：2

页面范围：1-6

ISSN号：1434-6044

摘要：In this paper, we revisit the generalized Chaplygin gas (GCG) model as a unified dark matter and dark energy model. The energy density of GCG model is given as rho(GCG)/rho(GCG0) = [B-s +(1 - B-s) a(-3(1+alpha))](1/(1+alpha)), where alpha and B-s are two model parameters which will be constrained by type Ia supernova as standard candles, baryon acoustic oscillation as standard rulers and the seventh year full WMAP data points. In this paper, we will not separate GCG into dark matter and dark energy parts any more as adopted in the literature. By using the Markov Chain Monte Carlo method, we find the results alpha = 0.00126(-0.00126-0.00126)(+0.000970+0.00268) and B-s = 0.775(-0.0161-0.0338)(+0.0161+0.0307).