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Do the observational data favor a local void?
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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 $\Lambda$-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.
Forward citations
Cited by 3 Pith papers
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Can cosmic voids ease the Hubble tension? Local expansion in $w_0w_a$CDM
A KBC-like local void lowers the SH0ES–Planck Hubble tension to about 2σ but cannot fully resolve it, and evolving dark energy shifts the required void depth by only ~1%.
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Alleviating the Hubble Tension with a Local Void and Transitions of the Absolute Magnitude
Deep LTB void models with two or three distance-dependent jumps in the supernova absolute magnitude fit Pantheon+ and Planck data well and push the inferred local Hubble constant toward the SH0ES value.
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Hubble tension: a short review of theoretical explanations
A comprehensive review finds no theoretical Hubble-tension solution yet passes all consistency tests; new early-dark-energy chains reach high H0 only when the SH0ES calibration is added.
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