论文标题
CMB镜头和BAO测量之间的哈勃恒定差异
Hubble constant difference between CMB lensing and BAO measurements
论文作者
论文摘要
我们应用张力度量$ q_ \ textrm {udm} $（平均参数的更新差异），以了解测量的哈勃太常量$ h_0 $ h_0 $用宇宙微波背景镜头测量与planck卫星相关（$ h_0 = 67.9.9 = 67.9^^{+1.1}^{+1.1} _} _ { - 1.3 \ MathRM {km/s/mpc} $）和南极望远镜（$ h_0 = 72.0^{+2.1} _ { - 2.5} \，\ Mathrm {km/s/s/s/mpc} $）在与Baryon Qosoustic oscillation（Bao）中均与PRN级的bbare（BARY）相结合。 $ q_ \ textrm {udm} $隔离了两个数据集的张力或一致性的相关参数方向，并在识别获得观察到的张力的数据子集的情况下有助于识别数据集。使用$ q_ \ textrm {udm} $，我们发现$ H_0 $的差异是由Planck Lensing和Bao+BBN之间的张力驱动的，概率为6.6％。这种温和的张力大部分来自与视线平行的星系BAO测量。平行BAO的红移依赖性将物质密度$ω_m$和$ H_0 $ CDM中的高高提升，但是当BAO测量与其他具有更强$ω_m$ $ $ $ $ $ $的宇宙学数据集相结合时，这些参数异常通常会隐藏。
We apply a tension metric $Q_\textrm{UDM}$, the update difference in mean parameters, to understand the source of the difference in the measured Hubble constant $H_0$ inferred with cosmic microwave background lensing measurements from the Planck satellite ($H_0=67.9^{+1.1}_{-1.3}\, \mathrm{km/s/Mpc}$) and from the South Pole Telescope ($H_0=72.0^{+2.1}_{-2.5}\, \mathrm{km/s/Mpc}$) when both are combined with baryon acoustic oscillation (BAO) measurements with priors on the baryon density (BBN). $Q_\textrm{UDM}$ isolates the relevant parameter directions for tension or concordance where the two data sets are both informative, and aids in the identification of subsets of data that source the observed tension. With $Q_\textrm{UDM}$, we uncover that the difference in $H_0$ is driven by the tension between Planck lensing and BAO+BBN, at probability-to-exceed of 6.6%. Most of this mild tension comes from the galaxy BAO measurements parallel to the line of sight. The redshift dependence of the parallel BAOs pulls both the matter density $Ω_m$ and $H_0$ high in $Λ$CDM, but these parameter anomalies are usually hidden when the BAO measurements are combined with other cosmological data sets with much stronger $Ω_m$ constraints.
