利用最新哈勃参数和物质结构增长参数检验和限制宇宙学模型  

Constrain cosmological model with the latest Hubble parameters and matter structure growth parameters

作　　者：王春香[1] 陈钢[1] 

机构地区：[1]天津师范大学物理与材料科学学院,天津300387

出　　处：《天津师范大学学报（自然科学版）》2016年第3期16-20,共5页Journal of Tianjin Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(10903006)

摘　　要：为了用最新的哈勃参数和物质结构增长观测值限制标准宇宙学模型,在前人相关研究的基础上,搜集了哈勃参数和宇宙物质结构增长参数的最新测量结果,考虑观测值间可能存在的关联性,整理出其中相对独立的观测值,并利用最小二乘法对不限制曲率的标准宇宙学模型和曲率为0的标准宇宙学模型进行限制,得到暗物质、暗能量和物质涨落幅度的最佳拟合值,所得结果与现在主要的观测结果一致,且限制结果所对应的约化值均在0.7左右.此外,哈勃参数显示的宇宙历史与宇宙物质涨落增长参数显示的宇宙历史一致,且由暗物质和暗能量占主导的标准宇宙模型的有效性不会受未知系统误差的影响.In order to use the latest Hubble observation parameters and matter density growth parameters to constrain the standard cosmological model, the latest results for the Hubble parameter and the matter density growth parameter were col- lected on the basis of earlier related researches in the literature. Considering the potential correlation among the observed values, the relatively independent ones were sorted out, and then used to constrain the standard cosmological model, with or without the space curvature k fixed to 0, using the least squares method. The best constraints on the cosmological con- stant, cold dark matter and the amplitude of matter density fluctuation are consistent with existing results. The value ofx2v is about 0.7. In addition, the history reflected by the Hubble parameters is consistent with the history reflected by the matter density growth parameters, and the validity of the standard cosmological model dominated by dark matter and dark energy are likely not affected by any unknown systematic error.

关 键 词：哈勃参数 物质结构增长参数 暗能量 标准宇宙学模型 

分 类 号：P142[天文地球—天体物理]