To H0 or not to H0?
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY(2021)
Abstract
This paper investigates whether changes to late-time physics can resolve the 'Hubble tension'. It is argued that many of the claims in the literature favouring such solutions are caused by a misunderstanding of how distance ladder measurements actually work and, in particular, by the inappropriate use of a distance ladder H-0 prior. A dynamics-free inverse distance ladder shows that changes to late-time physics are strongly constrained observationally and cannot resolve the discrepancy between the SH0ES data and the base Lambda CDM cosmology inferred from Planck. We propose a statistically rigorous scheme to replace the use of H-0 priors.
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Key words
cosmological parameters,distance scale,cosmology: observations
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