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

作　　者：吴普训 余洪伟 

机构地区：[1]School of Sciences and Institute of Physics, Central South University of Forestry and Technology, Changsha 410004 [2]Department of Physics and Institute of Physics, Normal University, Changsha 410081

出　　处：《Chinese Physics Letters》2007年第3期843-845,共3页中国物理快报（英文版）

基　　金：Supported in part by the National Natural Science Foundation of China under Grants Nos 10375023 and 10575035, the Programme for NCET under Grant No 04-0784, the Key Project of the Ministry of Education of China （No 205110）, and the Doctor Foundation of CSUFT.

摘　　要：We investigate the constraints on a generalized Chaplygin gas （GCG） model using the gold sample type-Ia supernovae （She 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, A8 = 0.76^＋0.07 -0.07 and α= 0.028^＋0.322 -0.2382 Our results are consistent with the ACDM model （α= 0）, but rule out the standard Chaplygin gas model （α= 1）.We investigate the constraints on a generalized Chaplygin gas （GCG） model using the gold sample type-Ia supernovae （She 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, A8 = 0.76^＋0.07 -0.07 and α= 0.028^＋0.322 -0.2382 Our results are consistent with the ACDM model （α= 0）, but rule out the standard Chaplygin gas model （α= 1）.

关 键 词：GENERALIZED CHAPLYGIN-GAS HIGH-REDSHIFT SUPERNOVAE HUBBLE-SPACE-TELESCOPE COSMOLOGICAL PARAMETERS CONSTANT OMEGA(LAMBDA) STATISTICS MAXIMA-1 OMEGA(M) UNIVERSE 

分 类 号：P14[天文地球—天体物理]