论文标题
2分角相关性和哈勃张力中的BAO签名
BAO signatures in the 2-point angular correlations and the Hubble tension
论文作者
论文摘要
使用早期和晚期宇宙信息的哈勃参数估计的观察性张力是文献中的强烈讨论。此外，独立于CMB数据和本地距离梯子方法测量$ H_0 $非常重要。从这个意义上讲，我们分析了15个对横向BAO量表的测量，$θ_ {\ rm bao} $，以弱模型的方法获得，以及以模型独立的方式获得的其他数据集，即，大爆炸核合成（bbn）与6个Graftiticationallicalliticalliclitical Lightitical lighting and time and time and 0 Quass of 0 equass of 0 equasers of Hh Quass of Hh yemers of 0宇宙天文组织（CC）。我们发现$ h_0 = 74.88 _ { - 2.1}^{+1.9} $ km s $ s $ {}^{ - 1} $ mpc $ {}^{ - 1} $ and $ h_0 = 72.06 _ { - 1.3} mpc $ {}^{ - 1} $来自$θ_{bao} $+bbn+h0licow和$θ_{bao} $+bbn+cc，完全符合本地测量。此外，我们估计Drag Epoch的声音范围，$ r _ {\ rm d} $，独立于CMB数据，找到$ r _ {\ rm d} = 144.1 _ { - 5.5}^{+5.3} {+5.3} $ MPC（来自$θ_{bao} $++bbn+bbn+bbn+h0lial+h0lip of） = 150.4 _ { - 3.3}^{+2.7} $ MPC（来自$θ_{Bao} $+BBN+CC）。在第二轮分析中，我们测试了可能的空间曲率$ω_K$的存在如何影响主要结果。我们将$ H_0 $和$ r _ {\ rm d} $的约束与其他报告的值进行比较。我们的结果表明，可以使用$θ_{bao} $的横向BAO数据进行稳健的汇编，并与其他独立的测量值共同使用，以至于可以缓解哈勃参数上的张力。
An observational tension on estimates of the Hubble parameter, $H_0$, using early and late Universe information, is being of intense discussion in the literature. Additionally, it is of great importance to measure $H_0$ independently of CMB data and local distance ladder method. In this sense, we analyze 15 measurements of the transversal BAO scale, $θ_{\rm BAO}$, obtained in a weakly model-dependent approach, in combination with other data sets obtained in a model-independent way, namely, Big Bang Nucleosynthesis (BBN) information, 6 gravitationally lensed quasars with measured time delays by the H0LiCOW team, and measures of cosmic chronometers (CC). We find $H_0 = 74.88_{-2.1}^{+1.9}$ km s${}^{-1}$ Mpc${}^{-1}$ and $H_0 = 72.06_{-1.3}^{+1.2}$ km s${}^{-1}$ Mpc${}^{-1}$ from $θ_{BAO}$+BBN+H0LiCOW and $θ_{BAO}$+BBN+CC, respectively, in fully accordance with local measurements. Moreover, we estimate the sound horizon at drag epoch, $r_{\rm d}$, independent of CMB data, and find $r_{\rm d}=144.1_{-5.5}^{+5.3}$ Mpc (from $θ_{BAO}$+BBN+H0LiCOW) and $r_{\rm d} =150.4_{-3.3}^{+2.7}$ Mpc (from $θ_{BAO}$+BBN+CC). In a second round of analysis, we test how the presence of a possible spatial curvature, $Ω_k$, can influence the main results. We compare our constraints on $H_0$ and $r_{\rm d}$ with other reported values. Our results show that it is possible to use a robust compilation of transversal BAO data, $θ_{BAO}$, jointly with other model-independent measurements, in such a way that the tension on the Hubble parameter can be alleviated.
