Resolving the Hubble tension with Early Dark Energy

Abstract

Early dark energy (EDE) offers a solution to the so-called Hubble tension. Recently, it was shown that the constraints on EDE using Markov Chain Monte Carlo are affected by prior volume effects. The goal of this paper is to present constraints on the fraction of EDE, $f_{\mathrm{EDE}}$, and the Hubble parameter, $H_0$, which are not subject to prior volume effects. We conduct a frequentist profile likelihood analysis considering Planck cosmic microwave background, BOSS full-shape galaxy clustering, DES weak lensing, and SH0ES supernova data. Contrary to previous findings, we find that $H_0$ for the EDE model is in statistical agreement with the SH0ES direct measurement at $\le 1.7\sigma$ for all data sets. For our baseline data set (Planck + BOSS), we obtain $f_{\mathrm{EDE}}=0.087\pm 0.037$ and $H_0=70.57\pm 1.36km/s/Mpc$ at $68\%$ confidence limit. We conclude that EDE is a viable solution to the Hubble tension.

arXiv comment6 pages, 3 figures, 1 table

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