English

Do the observational data favor a local void?

Cosmology and Nongalactic Astrophysics 2021-06-30 v4

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 Λ\Lambda-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.

Keywords

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

R2 v1 2026-06-23T20:59:09.385Z