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arXiv 2103.01183astro-ph.COastro-ph.GAgr-qchep-ph
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在哈伯张力的领域中$-$解的回顾

In the Realm of the Hubble tension $-$ a Review of Solutions

Eleonora Di Valentino, Olga Mena, Supriya Pan, Luca Visinelli, Weiqiang Yang, Alessandro Melchiorri, David F. Mota, Adam G. Riess, Joseph Silk

备注：
Invited Review of about 134 pages with many figures and tables. Accepted for publication in CQG. A sample code for producing similar whisker plots (e.g. Figs. 1, 2) associated with this Review for any choice of the data is made publicly available online at: https://github.com/lucavisinelli/H0TensionRealm
发表信息：
Class. Quantum Grav. 38, 153001 (2021)
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摘要：

$Λ$ CDM模型提供了一个很好的适合大跨度的宇宙学数据，但港口的现象学领域。随着观测数量的增加和观测精度的提高，模型中的关键宇宙学参数之间的差异逐渐显现。最有统计意义的张力是早期探测器用$Λ$ CDM模型对哈勃常数$H_0$的预测与一些晚期的、独立于模型的距离和红移的局部测量对$H_0$的测定之间的$4-6σ$分歧。两端数据的高精确度和一致性对可能的解空间提出了强大的挑战，并需要足够严格的假设来解释多个观察结果--无论这些观察结果是否引用了新物理、意外的大尺度结构或多个不相关的错误。我们提出了一个彻底的审查的问题，包括最近的哈勃常数估计和建议的理论解决方案的总结讨论。提出的一些模型在形式上是成功的，根据其额外的自由度提高了对数据的拟合，恢复了{ \it Planck} 2018之间的$1-2σ$内的一致性，使用CMB功率谱数据，BAO，Pantheon SN数据和R20，最新的SH 0 ES团队测量哈勃常数（$H_0 = 73.2 \pm 1.3{\rm\,km\,s^{-1}\,Mpc^{-1}}$在68\%的置信水平）。张力的降低可能不仅仅来自于$H_0$的变化，还来自于由于简并性而增加的不确定性，这表明需要额外的探针。虽然没有一个具体的方案能够证明它的可能性很高，或者比其他方案好得多，但在出现更好的方案之前，涉及早期或动态暗能量、中微子相互作用、相互作用宇宙学、原始磁场和修正引力的方案是最好的选择。[删节]

英文摘要：

The $Λ$CDM model provides a good fit to a large span of cosmological data but harbors areas of phenomenology. With the improvement of the number and the accuracy of observations, discrepancies among key cosmological parameters of the model have emerged. The most statistically significant tension is the $4-6σ$ disagreement between predictions of the Hubble constant $H_0$ by early time probes with $Λ$CDM model, and a number of late time, model-independent determinations of $H_0$ from local measurements of distances and redshifts. The high precision and consistency of the data at both ends present strong challenges to the possible solution space and demand a hypothesis with enough rigor to explain multiple observations--whether these invoke new physics, unexpected large-scale structures or multiple, unrelated errors. We present a thorough review of the problem, including a discussion of recent Hubble constant estimates and a summary of the proposed theoretical solutions. Some of the models presented are formally successful, improving the fit to the data in light of their additional degrees of freedom, restoring agreement within $1-2σ$ between {\it Planck} 2018, using CMB power spectra data, BAO, Pantheon SN data, and R20, the latest SH0ES Team measurement of the Hubble constant ($H_0 = 73.2 \pm 1.3{\rm\,km\,s^{-1}\,Mpc^{-1}}$ at 68\% confidence level). Reduced tension might not simply come from a change in $H_0$ but also from an increase in its uncertainty due to degeneracy with additional physics, pointing to the need for additional probes. While no specific proposal makes a strong case for being highly likely or far better than all others, solutions involving early or dynamical dark energy, neutrino interactions, interacting cosmologies, primordial magnetic fields, and modified gravity provide the best options until a better alternative comes along.[Abridged]

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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