Observational Constraints on the Unified Dark-Energy Dark-Matter Model

Details Observational Constraints on the Unified Dark-Energy Dark-Matter Model Observational Constraints on the Unified Dark-Energy Dark-Matter Model

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007chphl..24..843w&link_type=abstract

Chinese Physics Letters, Volume 24, Issue 3, pp. 843-845 (2007).

Physics

2

Scientific paper

We investigate the constraints on a generalized Chaplygin gas (GCG) model using the gold sample type-Ia supernovae (Sne Ia) data, the new Supernova Legacy Survey (SNLS) Sne Ia data and the size of baryonic acoustic oscillation peak found in Sloan Digital Sky Survey (SDSS). In a spatially flat universe case we obtain, at a 95.4% confidence level, As = 0.76-0.07+0.07 and α = 0.028-0.238+0.322. Our results are consistent with the ΛCDM model (α = 0), but rule out the standard Chaplygin gas model (α = 1).

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