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 the Λ -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 Lemaître-Tolman-Bondi metric with a cosmological constant. Our conclusion strengthens the previous studies that the current tension on Hubble constant cannot be saved by a local void alone.
- Publication:
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Physical Review D
- Pub Date:
- June 2021
- DOI:
- 10.1103/PhysRevD.103.123539
- arXiv:
- arXiv:2012.08292
- Bibcode:
- 2021PhRvD.103l3539C
- Keywords:
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- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- 9 pages, 5 figures, to match the published version