Consistent observations indicate that some of the important cosmological parameters measured through the local observations are in huge tension with their measurements from the global observations (within the minimal $\Lambda$CDM cosmology). The tensions in those cosmological parameters have been found to be either weakened or reconciled with the introduction of new degrees of freedom that effectively increases the underlying parameter space compared to the minimal $\Lambda$CDM cosmology. It might be interesting to investigate the above tensions within the context of an emergent dark energy scenario proposed recently by Li and Shafieloo~\cite{Li:2019yem}. We find that the tension on $H_0$ is clearly alleviated within 68\% confidence level with an improvement of the $\chi^2$ for CMB, for the above emergent dark energy model having only six free parameters similar to the spatially flat $\Lambda$CDM model. The tension on $H_0$ is still alleviated for every combined datasets considered in the work, however, such alleviation occurs by worsening the $\chi^2$ compared to the $\chi^2$ for $\Lambda$CDM model obtained for the same combined dataset.

中文翻译：

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在六参数空间中协调 H0 张力？

一致的观测表明，通过局部观测测量的一些重要的宇宙学参数与其全球观测的测量结果（在最小的 $\Lambda$CDM 宇宙学范围内）存在巨大的张力。与最小的 $\Lambda$CDM 宇宙学相比，这些宇宙学参数的张力被削弱或与新自由度的引入相协调，新的自由度有效地增加了潜在的参数空间。在 Li 和 Shafieloo 最近提出的新兴暗能量情景的背景下调查上述紧张局势可能会很有趣~\cite{Li:2019yem}。我们发现 $H_0$ 上的紧张在 68\% 置信水平内明显缓解，CMB 的 $\chi^2$ 有所改善，对于上述只有 6 个自由参数的涌现暗能量模型，类似于空间平坦的 $\Lambda$CDM 模型。对于工作中考虑的每个组合数据集，$H_0$ 上的紧张局势仍然得到缓解，但是，与获得的 $\Lambda$CDM 模型的 $\chi^2$ 相比，这种缓解是通过使 $\chi^2$ 恶化相同的组合数据集。