论文标题

使用低红移,非CMB数据来限制哈勃常数和其他宇宙学参数

Using lower-redshift, non-CMB, data to constrain the Hubble constant and other cosmological parameters

论文作者

Cao, Shulei, Ratra, Bharat

论文摘要

We use updated Hubble parameter and baryon acoustic oscillation data, as well as other lower-redshift Type Ia supernova, Mg II reverberation-measured quasar, quasar angular size, H II starburst galaxy, and Amati-correlated gamma-ray burst data, to jointly constrain cosmological parameters in six cosmological models. The joint analysis provides model-independent determinations of the Hubble constant, $H_0=69.7\pm1.2$ $\rm{km \ s^{-1} \ Mpc^{-1}}$, and the current non-relativistic matter density parameter, $Ω_{m0}=0.295\pm0.017$.这些误差线比来自Planck TT,TE,EE+Lowe+Lensing Cosmic微波背景各向异性数据的Flat $λ$ CDM模型中的相应误差线大2.2和2.3。根据偏差信息标准(DIC),最喜欢扁平的$λ$ CDM模型,但是轻度的暗能动力学和少量空间曲率并未排除。

We use updated Hubble parameter and baryon acoustic oscillation data, as well as other lower-redshift Type Ia supernova, Mg II reverberation-measured quasar, quasar angular size, H II starburst galaxy, and Amati-correlated gamma-ray burst data, to jointly constrain cosmological parameters in six cosmological models. The joint analysis provides model-independent determinations of the Hubble constant, $H_0=69.7\pm1.2$ $\rm{km \ s^{-1} \ Mpc^{-1}}$, and the current non-relativistic matter density parameter, $Ω_{m0}=0.295\pm0.017$. These error bars are factors of 2.2 and 2.3 larger than the corresponding error bars in the flat $Λ$CDM model from Planck TT,TE,EE+lowE+lensing cosmic microwave background anisotropy data. Based on the deviance information criterion (DIC), the flat $Λ$CDM model is most favored but mild dark energy dynamics and a little spatial curvature are not ruled out.

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