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H0LiCOW XIII. A 2.4% measurement of H0 from lensed quasars: 5.3σ tension between early and late-Universe probes
Monthly Notices of the Royal Astronomical Society ( IF 4.7 ) Pub Date : 2019-09-16 , DOI: 10.1093/mnras/stz3094
Kenneth C Wong, Sherry H Suyu, Geoff C-F Chen, Cristian E Rusu, Martin Millon, Dominique Sluse, Vivien Bonvin, Christopher D Fassnacht, Stefan Taubenberger, Matthew W Auger, Simon Birrer, James H H Chan, Frederic Courbin, Stefan Hilbert, Olga Tihhonova, Tommaso Treu, Adriano Agnello, Xuheng Ding, Inh Jee, Eiichiro Komatsu, Anowar J Shajib, Alessandro Sonnenfeld, Roger D Blandford, Léon V E Koopmans, Philip J Marshall, Georges Meylan

We present a measurement of the Hubble constant ($H_{0}$) and other cosmological parameters from a joint analysis of six gravitationally lensed quasars with measured time delays. All lenses except the first are analyzed blindly with respect to the cosmological parameters. In a flat $\Lambda$CDM cosmology, we find $H_{0} = 73.3_{-1.8}^{+1.7}$, a 2.4% precision measurement, in agreement with local measurements of $H_{0}$ from type Ia supernovae calibrated by the distance ladder, but in $3.1\sigma$ tension with $Planck$ observations of the cosmic microwave background (CMB). This method is completely independent of both the supernovae and CMB analyses. A combination of time-delay cosmography and the distance ladder results is in $5.3\sigma$ tension with $Planck$ CMB determinations of $H_{0}$ in flat $\Lambda$CDM. We compute Bayes factors to verify that all lenses give statistically consistent results, showing that we are not underestimating our uncertainties and are able to control our systematics. We explore extensions to flat $\Lambda$CDM using constraints from time-delay cosmography alone, as well as combinations with other cosmological probes, including CMB observations from $Planck$, baryon acoustic oscillations, and type Ia supernovae. Time-delay cosmography improves the precision of the other probes, demonstrating the strong complementarity. Allowing for spatial curvature does not resolve the tension with $Planck$. Using the distance constraints from time-delay cosmography to anchor the type Ia supernova distance scale, we reduce the sensitivity of our $H_0$ inference to cosmological model assumptions. For six different cosmological models, our combined inference on $H_{0}$ ranges from $\sim73$-$78~\mathrm{km~s^{-1}~Mpc^{-1}}$, which is consistent with the local distance ladder constraints.

中文翻译:

H0LiCOW XIII. 来自透镜类星体的 2.4% 的 H0 测量值:早期和晚期宇宙探测器之间的张力为 5.3σ

我们通过对六个具有测量时间延迟的引力透镜类星体的联合分析,展示了哈勃常数 ($H_{0}$) 和其他宇宙学参数的测量结果。除了第一个之外的所有镜头都根据宇宙学参数进行盲目分析。在平坦的 $\Lambda$CDM 宇宙学中,我们发现 $H_{0} = 73.3_{-1.8}^{+1.7}$,精度为 2.4%,与 $H_{0}$ 的局部测量值一致由距离阶梯校准的 Ia 型超新星,但在 $3.1\sigma$ 张力与 $Planck$ 宇宙微波背景 (CMB) 观测。这种方法完全独立于超新星和 CMB 分析。时延宇宙学和距离阶梯的组合结果是 $5.3\sigma$ 张力,$Planck$ CMB 确定 $H_{0}$ 在平坦的 $\Lambda$CDM。我们计算贝叶斯因子以验证所有镜头都给出了统计上一致的结果,这表明我们没有低估我们的不确定性并且能够控制我们的系统性。我们仅使用时滞宇宙学的约束,以及与其他宇宙学探测器的组合,包括来自普朗克的 CMB 观测、重子声波振荡和 Ia 型超新星,探索了平面 $\Lambda$CDM 的扩展。时滞宇宙学提高了其他探测器的精度,显示出很强的互补性。考虑到空间曲率并不能解决 $Planck$ 的张力。使用来自时延宇宙学的距离约束来锚定 Ia 型超新星距离尺度,我们降低了我们的 $H_0$ 推断对宇宙学模型假设的敏感性。对于六种不同的宇宙学模型,
更新日期:2019-09-16
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