论文标题
使用TRGB距离从处女座中心确定本地哈勃常数
Determination of the Local Hubble Constant from Virgo Infall Using TRGB Distances
论文作者
论文摘要
鉴于哈勃常数（$ h_0 $）在本地衍生而成的，并且取决于早期宇宙中宇宙微波背景（CMB）的建模确定，$ H_0 $的独立确定至关重要。在这项工作中，我们使用速度和红色巨型分支（TRGB）的尖端提出了$ H_0 $的新确定，该距离位于本地组和处女座集群之间的33个星系。我们使用由处女座质量修改的本地哈勃流量的插座模式的模型，该模型是根据宇宙常数（$ h_0 $，$ω_λ$）的函数给出的，零速度表面$ r_0 $的半径以及固有的速度速度分散剂，$σ_v$。与该模型的33个星系的拟合速度和TRGB距离，我们获得$ H_0 = $ 65.8 $ \ pm $ 3.5（$ stat $）$ \ pm $ \ pm $ 2.4（$ sys $）km s $ s $^{ - 1} $ MPC $^{ - 1} $^{ - 1} $ and $ r_0 = $ 6.76 $ \ 6.76 $ \ $ \ $ \ $ 0.35 MPC。我们本地的$ H_0 $与从CMB辐射确定的全局$ H_0 $一致，没有张力。此外，我们为NGC 4437和NGC 4592提供了新的TRGB距离，分别位于零速度表面附近：d = 9.28 $ \ pm $ 0.39 MPC和D = 9.07 $ \ pm $ 0.27 MPC。他们的空间分离为0.29 $^{+0.30} _ { - 0.03} $ mpc，表明它们形成了物理对。
An independent determination of $H_0$ is crucial given the growing tension between the Hubble constant, $H_0$, derived locally and that determined from the modeling of the cosmic microwave background (CMB) originating in the early universe. In this work, we present a new determination of $H_0$ using velocities and tip of the red giant branch (TRGB) distances to 33 galaxies located between the Local Group and the Virgo cluster. We use a model of the infall pattern of the local Hubble flow modified by the Virgo mass, which is given as a function of the cosmological constants ($H_0$, $Ω_Λ$), the radius of the zero-velocity surface $R_0$, and the intrinsic velocity dispersion, $σ_v$. Fitting velocities and TRGB distances of 33 galaxies to the model, we obtain $H_0 =$ 65.8 $\pm$ 3.5($stat$) $\pm$ 2.4($sys$) km s$^{-1}$ Mpc$^{-1}$ and $R_0 =$ 6.76 $\pm$ 0.35 Mpc. Our local $H_0$ is consistent with the global $H_0$ determined from CMB radiation, showing no tension. In addition, we present new TRGB distances to NGC 4437 and NGC 4592 which are located near the zero-velocity surface: D = 9.28 $\pm$ 0.39 Mpc and D = 9.07 $\pm$ 0.27 Mpc, respectively. Their spatial separation is 0.29$^{+0.30}_{-0.03}$ Mpc, suggesting that they form a physical pair.
