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Tensions between the early and late Universe

A Kavli Institute for Theoretical Physics workshop in July 2019 directed attention to the Hubble constant discrepancy. New results showed that it does not appear to depend on the use of any one method, team or source. Proposed solutions focused on the pre-recombination era.

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Fig. 1: Compilation of Hubble constant predictions and measurements taken from the recent literature and presented or discussed at the meeting.

courtesy of Vivien Bonvin and Martin Millon.


  1. Riess, A. G., Casertano, S., Yuan, W., Macri, L. M. & Scolnic, D. Astrophys. J. 876, 85 (2019).

    ADS  Article  Google Scholar 

  2. Wong, K. C. et al. Preprint at (2019).

  3. Chen, G. C.-F. et al. Preprint at (2019).

  4. Birrer, S. et al. Mon. Not. R. Astron. Soc. 484, 4726–4753 (2019).

    ADS  Article  Google Scholar 

  5. Reid, M. J. et al. Astrophys. J. 695, 287 (2009).

    ADS  Article  Google Scholar 

  6. Freedman, W. L. et al. Preprint at (2019).

  7. Jang, I. S. & Lee, M. G. Astrophys. J. 835, 28 (2017).

    ADS  Article  Google Scholar 

  8. Yuan, W., Riess, A., Macri, L., Casertano, S. & Scolnic, D. Preprint at (2019).

  9. Potter, C. et al. In Am. Astron. Soc. Meet. #232 319.02 (2018).

  10. Huang, C. D. et al. Preprint at (2019).

  11. Pietrzyński, G. et al. Nature 567, 200–203 (2019).

    ADS  Article  Google Scholar 

  12. Shajib, A. J. et al. Mon. Not. R. Astron. Soc. 483, 5649–5671 (2019).

    ADS  Article  Google Scholar 

  13. Kelly, P. L. et al. Science 347, 1123–1126 (2015).

    ADS  Article  Google Scholar 

  14. Grillo, C. et al. Astrophys. J. 860, 94 (2018).

    ADS  Article  Google Scholar 

  15. Abbott, B. P. et al. Nature 551, 85–88 (2017).

    ADS  Article  Google Scholar 

  16. Jimenez, R., Cimatti, A., Verde, L., Moresco, M. & Wandelt, B. J. Cosmol. Astropart. Phys. 2019, 043 (2019).

    Article  Google Scholar 

  17. O’Malley, E. M., Gilligan, C. & Chaboyer, B. Astrophys. J. 838, 162 (2017).

    ADS  Article  Google Scholar 

  18. Moresco, M. et al. Astrophys. J. 868, 84 (2018).

    ADS  Article  Google Scholar 

  19. Moresco, M. et al. J. Cosmol. Astropart. Phys. 2016, 014 (2016).

    Article  Google Scholar 

  20. Addison, G. E. et al. Astrophys. J. 853, 119 (2018).

    ADS  Article  Google Scholar 

  21. Cuceu, A., Farr, J., Lemos, P. & Font-Ribera, A. Preprint at (2019).

  22. Bernal, J. L. & Peacock, J. A. J. Cosmol. Astropart. Phys. 2018, 002 (2018).

    Article  Google Scholar 

  23. Knox, L. & Millea, M. Preprint at (2019).

  24. Aylor, K. et al. Astrophys. J. 874, 4 (2019).

    ADS  Article  Google Scholar 

  25. Poulin, V., Smith, T. L., Karwal, T. & Kamionkowski, M. Phys. Rev. Lett. 122, 221301 (2019).

    ADS  Article  Google Scholar 

  26. Kreisch, C. D., Cyr-Racine, F.-Y. & Doré, O. Preprint at (2019).

  27. Agrawal, P., Cyr-Racine, F.-Y., Pinner, D. & Randall, L. Preprint at (2019).

  28. Abbott, T. M. C. et al. Mon. Not. R. Astron. Soc. 480, 3879–3888 (2018).

    ADS  Article  Google Scholar 

  29. Aghanim, N. et al. Preprint at (2018).

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We thank KITP for hosting and supporting the workshop ‘Tensions between the Early and the Late Universe’. We thank all of the participants for an extremely lively and productive workshop. We are also grateful to those who contributed to the scientific results presented at the meeting but could not attend in person. Finally, we are especially grateful to V. Bonvin and A. Shajib for producing and updating versions of Fig. 1 during the meeting, keeping up with the fast pace of the presentation of new results. L.V. acknowledges support from the European Union’s Horizon 2020 research and innovation programme ERC (BePreSySe, grant agreement 725327). T.T. acknowledges support from the Packard Foundation through a Packard Research fellowship, from the National Science Foundation through grant AST-1714953, and from NASA through grants 10158 HST-GO-12889 and HST-14254.

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Correspondence to Licia Verde.

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Verde, L., Treu, T. & Riess, A.G. Tensions between the early and late Universe. Nat Astron 3, 891–895 (2019).

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