Relativity and Cosmology

    

Resolving the Hubble Tension via Intrinsic Supernova Luminosity Evolution: Evidence from Pantheon+

Authors: Michal Ozga

The Hubble Tension—the statistically significant (5σ) discrepancy between Planck and SH0ES determinations of the Hubble constant—is typically interpreted as evidence for either new physics beyond ΛCDM or local geometric anomalies (e.g., a "Local Void"). In this work, we perform a rigorous hypothesis test using the Pantheon+ Type Ia Supernovae dataset (1701 events), incorporating the full systematic covariance matrix. We test two competing models against the standard cosmological baseline: (1) a local geometric underdensity modeled via virial phase-space dynamics, and (2) an astrophysical model allowing for intrinsic luminosity evolution of SNe Ia. Our analysis yields two decisive results: geometric solutions are strongly excluded by the data, while intrinsic luminosity evolution is statistically preferred, aligning the Pantheon+ distance scale with Planck-derived H_0.

Comments: 4 Pages. English. PDF generated from LaTeX. Submitted under standard viXra terms.

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[v1] 2025-12-07 22:06:52

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