http://arxiv.org/abs/2006.06712
An accurate determination of the Hubble constant remains a puzzle in observational cosmology. The possibility of a new physics has emerged with a significant tension between the current expansion rate of our Universe measured from the cosmic microwave background by the Planck satellite and from local methods. In this paper, new tight estimates on this parameter are obtained by considering two data sets from galaxy distribution observations: galaxy cluster gas mass fractions and baryon acoustic oscillation measurements. By considering the flat and non-flat $\Lambda$CDM models, we obtain, respectively: $H_0=65.89^{+1.54}{-1.50}$ km s$^{-1}$ Mpc$^{-1}$ and $H_0=64.31^{+ 4.50}{- 4.45}$ km s$^{-1}$ Mpc$^{-1}$ at $2\sigma$ c.l. in full agreement with the Planck satellite results. Our results also support a negative value for the deceleration parameter at least in 3$\sigma$ c.l..
R. Holanda, G. Pordeus-da-Silva and S. Pereira
Mon, 15 Jun 20
66/73
Comments: 8 pages, 3 figues, I table
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