Do the observational data favor a local void?
Abstract
The increasing tension between the different local direct measurements of the Hubble expansion rate and that inferred from the Cosmic Microwave Background observation by -Cold-Dark-Matter model could be a smoking gun of new physics, if not caused by either observational systematics or local bias. We generalize previous investigation on the local bias from a local void by globally fitting the Pantheon sample over all parameters in the radial profile function of a local void described by an inhomogeneous but isotropic Lema\^{i}tre-Tolman-Bondi metric with a cosmological constant. Our conclusion strengths the previous studies that the current tension on Hubble constant cannot be saved by a local void alone.
Cite
@article{arxiv.2012.08292,
title = {Do the observational data favor a local void?},
author = {Rong-Gen Cai and Jia-Feng Ding and Zong-Kuan Guo and Shao-Jiang Wang and Wang-Wei Yu},
journal= {arXiv preprint arXiv:2012.08292},
year = {2021}
}
Comments
9 pages, 5 figures, to match the published version