nLab Hubble's law




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theory (physics), model (physics)

experiment, measurement, computable physics




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Possible tension of model with observation

Possible tensions in the standard model of cosmology, regarding determination of the Hubble constant in the early and late universe, apparently observed by various groups, since the late 2010s:


  • L. Verde T. Treu, A.G. Riess, Tensions between the Early and the Late Universe (arXiv:1907.10625)

Indication that the tension is not in the data but in systematic errors:

  • Freedman et al. The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch (arxiv:1907.05922)

Indication that the tension is not in systematic errors:

  • Adam Riess, Gagandeep Anand, Wenlong Yuan, Stefano Casertano, Andrew Dolphin, Lucas Macri, Louise Breuval, Dan Scolnic, Marshall Perrin, Richard Anderson, Crowded No More: The Accuracy of the Hubble Constant Tested\with High Resolution Observations of Cepheids by JWST (arXiv:2307.15806)

Indication from new data from the James Webb Space Telescope that the old data does not have systematic errors and the tension is in the data:

Indication that the tension is not resolved by effects in inhomogeneous cosmology (such as the KBC void):

  • Hao-Yi Wu, Dragan Huterer, Sample variance in the local measurements of the Hubble constant, Monthly Notices of the Royal Astronomical Society, Volume 471, Issue 4, November 2017, Pages 4946–4955 (arXiv:1706.09723)

Indications that the Hubble constant is decreasing over time:

  • Xuan-Dong Jia, Jian-Ping Hu, Fa-Yin Wang, The evidence for a decreasing trend of Hubble constant, (arXiv:2212.00238)

On the status of the Hubble tension as of 25 January 2023

  • Maria Dainotti, Biagio De Simone, Giovanni Montani, Tiziano Schiavone, Gaetano Lambiase, The Hubble constant tension: current status and future perspectives through new cosmological probes (arXiv:2301.10572)

On the local value of the Hubble constant:

Last revised on August 30, 2023 at 23:30:30. See the history of this page for a list of all contributions to it.