Growth of linear matter perturbations and current observational constraints  

作　　者：付响云 吴普训 余洪伟 

机构地区：[1]Department of Physics and Institute of Physics,Hunan Normal University

出　　处：《Chinese Physics B》2010年第7期624-629,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grants Nos. 10775050,10705055 and 10935013;the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20070542002);the Programme for the Key Discipline in Hunan Province of China,the Foundation for the Author of National Excellent Doctoral Dissertation of China(Grant No. 200922);the New Century Educational Talents Plan of Chinese Education Ministry (Grant No. 09-0144)

摘　　要：We discuss, using a recently proposed parametrization for the growth index of linear matter perturbations, the observational constraints on the wCDM model and the Dvali Gabadadze-Porrati （DGP） model with all current growth factor data. We find that the wCDM model is allowed by the observations at the 1σ confidence level, while the DCP model is only consistent with observations at 2σ confidence level.We discuss, using a recently proposed parametrization for the growth index of linear matter perturbations, the observational constraints on the wCDM model and the Dvali Gabadadze-Porrati （DGP） model with all current growth factor data. We find that the wCDM model is allowed by the observations at the 1σ confidence level, while the DCP model is only consistent with observations at 2σ confidence level.

关 键 词：dark energy DGP model matter perturbations 

分 类 号：P159[天文地球—天文学]