SNe observations in a meatball universe with a local void

TL;DR

This paper presents an inhomogeneous universe model combining a local void and a meatball structure to explain supernova observations without dark energy, aligning with the Copernican Principle.

Contribution

It introduces a novel inhomogeneous universe model that accounts for supernova data and cosmic acceleration without dark energy, using combined void and lensing effects.

Findings

Model mimics the concordance cosmology

Explains supernova data without dark energy

Compatible with the Copernican Principle

Abstract

We study the impact of cosmic inhomogeneities on the interpretation of observations. We build an inhomogeneous universe model without dark energy that can confront supernova data and yet is reasonably well compatible with the Copernican Principle. Our model combines a relatively small local void, that gives apparent acceleration at low redshifts, with a meatball model that gives sizeable lensing (dimming) at high redshifts. Together these two elements, which focus on different effects of voids on the data, allow the model to mimic the concordance model.