论文标题
$ h_0 $的测量和从独立的关节分析中重建了暗能量的性能
Measurements of $H_0$ and reconstruction of the dark energy properties from a model-independent joint analysis
论文作者
论文摘要
高斯工艺（GP）提供了一种优雅的独立于模型的方法，用于从观察数据中提取宇宙学信息。 In this work, we employ GP to perform a joint analysis by using the geometrical cosmological probes such as Supernova Type Ia (SN), Cosmic chronometers (CC), Baryon Acoustic Oscillations (BAO), and the H0LiCOW lenses sample to constrain the Hubble constant $H_0$, and reconstruct some properties of dark energy (DE), viz., the equation of state parameter $w$, de扰动的音速$ c^2_s $和de密度演化的比率$ x =ρ_{\ rm de}/ρ_{\ rm de，0} $。根据联合分析SN+CC+BAO+H0licow，我们发现$ H_0 $以1.1 \％精度约束，$ H_0 = 73.78 = 73.78 \ pm 0.84 $ km s $ s $ s $^{ - 1} $ mpc $^{ - 1} $，这与SH0ES和H0LICOW $ 6. $ 6. 2 $ 6. 2 $ H_0 $的测量值。关于de参数，我们发现$ c^2_s <0 $ at $ \ sim $ \ sim $ 2 $ 2 $σ$在高$ z $上，$ x $的可能性以$ z> 1.5 $变为负。我们将我们的结果与文献中获得的结果进行了比较，并讨论了我们主要结果对DE理论框架的后果。
Gaussian processes (GP) provide an elegant and model-independent method for extracting cosmological information from the observational data. In this work, we employ GP to perform a joint analysis by using the geometrical cosmological probes such as Supernova Type Ia (SN), Cosmic chronometers (CC), Baryon Acoustic Oscillations (BAO), and the H0LiCOW lenses sample to constrain the Hubble constant $H_0$, and reconstruct some properties of dark energy (DE), viz., the equation of state parameter $w$, the sound speed of DE perturbations $c^2_s$, and the ratio of DE density evolution $X = ρ_{\rm de}/ρ_{\rm de,0}$. From the joint analysis SN+CC+BAO+H0LiCOW, we find that $H_0$ is constrained at 1.1\% precision with $H_0 = 73.78 \pm 0.84$ km s$^{-1}$Mpc$^{-1}$, which is in agreement with SH0ES and H0LiCOW estimates, but in $\sim$6.2$σ$ tension with the current CMB measurements of $H_0$. With regard to the DE parameters, we find $c^2_s < 0$ at $\sim$2$σ$ at high $z$, and the possibility of $X$ to become negative for $z > 1.5$. We compare our results with the ones obtained in the literature, and discuss the consequences of our main results on the DE theoretical framework.
