Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 72, Issue 2, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-012-1883-7
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Funding
- Fundamental Research Funds for the Central Universities [DUT10LK31, DUT11LK39]
- National Natural Science Foundation of China [11147150]
- Natural Science Foundation of Education Department of Liaoning Province, China [L2011189]
- Fundamental Research Funds for the Central Universities [DUT10LK31, DUT11LK39]
- National Natural Science Foundation of China [11147150]
- Natural Science Foundation of Education Department of Liaoning Province, China [L2011189]
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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).
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