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

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2007,（3）
• 页码范围: 843-845
• 页数: 3页
• 语种: 英文

摘要

We investigate the constraints on a generalized Chaplygin gas (GCC) model using the gold sample type-Ia supernovae (She Ia) data, the new Supernova Legacy Survey (SNLS) She 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 ACDM model (α = 0), but rule out the standard Chaplygin gas model (α = 1).