Observational constraints on the early dark energy model

作     者：Lei Feng Yu-Peng Yang Lei Feng and Yu-Peng Yang Department of Physics,Nanjing University,Nanjing 210093,China Joint Center for Particle,Nuclear Physics and Cosmology,Nanjing University–Purple Mountain Observatory,Nanjing 210093,China

作者机构：Department of Physics Nanjing University Nanjing 210093 ChinaJoint Center for Particle Nuclear Physics and Cosmology Nanjing University - Purple MountainObservatory Nanjing 210093 China 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2011年第11卷第7期

页      面：751-758页

核心收录：

学科分类：080503[工学-材料加工工程] 0709[理学-地质学] 070801[理学-固体地球物理学] 07[理学] 08[工学] 0708[理学-地球物理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0704[理学-天文学] 0825[工学-航空宇航科学与技术] 080201[工学-机械制造及其自动化] 

主　　题：cosmology—dark energy—cosmological parameters 

摘      要：Dark energy can be studied by its influence on the expansion of the *** investigate current constraints on early dark energy（EDE） achievable by the combined observational data from type Ia supernovae（557）,baryon acoustic oscillations,the current cosmic microwave background and the observed Hubble *** find that combining these data sets provides powerful constraints on early dark energy and the best fit values of the parameters in 68% and 95% confidence-level regions are：Ωm0=0.2897 ＋0.0149＋0.0207 -0.0138-0.0194,Ωe=0.0129 ＋0.0272＋0.0381 -0.0129-0.0129,w0= -1.0415＋0.0891＋0.1182 -0.109-0.1604,and h=0.6988＋0.0059＋0.0083 -0.0058-0.0081.