Multiscale approach to inhomogeneous cosmologies

TL;DR

This paper explores a multiscale inhomogeneous cosmology model that links structure formation to accelerated expansion without Dark Energy, matching supernova data with a universe similar to LCDM.

Contribution

It introduces a novel inhomogeneous cosmology model that explains accelerated expansion without Dark Energy and aligns with observational data.

Findings

Model reproduces LCDM-like distance-redshift relation

Supports the idea that inhomogeneities influence cosmic acceleration

Demonstrates consistency with supernova observations

Abstract

The backreaction of inhomogeneities on the global expansion history of the Universe suggests a possible link of the formation of structures to the recent accelerated expansion. In this paper, the origin of this conjecture is illustrated and a model without Dark Energy that allows for a more explicit investigation of this link is discussed. Additionally to this conceptually interesting feature, the model leads to a LCDM-like distance-redshift relation that is consistent with SN data.