Is there any measurable redshift dependence on the SN Ia absolute magnitude?

TL;DR

This study investigates whether the absolute magnitude of Type Ia supernovae varies with redshift, using multiple models and data, but finds no evidence for deviation from the standard cosmological model.

Contribution

It systematically tests various phenomenological and physical models for redshift-dependent supernova magnitudes against observational data.

Findings

No significant redshift dependence detected.

Results consistent with standard $\\Lambda$CDM model.

Multiple models agree with existing cosmological parameters.

Abstract

We test the cosmological implications of a varying absolute magnitude of Type Ia supernovae using the Pantheon compilation, by reconstructing different phenomenological approaches that could justify a varying absolute magnitude, but also approaches based on cosmic voids, modified gravity models and a binning scheme. In all the cases considered in this work, we find good agreement with the expected values of the standard $\Lambda$CDM model and no evidence of new physics.