English

Addressing $H_0$ tension by means of VCDM

Cosmology and Nongalactic Astrophysics 2021-05-04 v5 General Relativity and Quantum Cosmology High Energy Physics - Theory

Abstract

In this letter we propose a reduction of the H0H_0 tension puzzle by means of a theory of minimally modified gravity which is dubbed VCDM. After confronting the theory with the experiments, we find that the data allow for a low-redshift transition in the expansion history of the universe at either z0.3z\simeq 0.3 or z1.8z \simeq 1.8\,, corresponding to one of the two local minima of the total χ2\chi^2. From the bestfit values the total fitness parameter is improved by Δχ212\Delta \chi^2 \simeq 12, for the data set considered. We then infer the local Hubble expansion rate today within this theory by means of low redshift Pantheon data. The resulting local Hubble expansion rate today is H0loc=73.6±1.4H^{\rm{loc}}_0=73.6\pm1.4. We find the tension is reduced within the VCDM theory.

Keywords

Cite

@article{arxiv.2009.08718,
  title  = {Addressing $H_0$ tension by means of VCDM},
  author = {Antonio De Felice and Shinji Mukohyama and Masroor C. Pookkillath},
  journal= {arXiv preprint arXiv:2009.08718},
  year   = {2021}
}

Comments

9 pages, 4 figures; minor revision in v5