Generalized Swiss-cheese cosmologies: Mass scales

TL;DR

This paper extends Swiss-cheese cosmologies to include boundary linear momenta, analyzing how these affect the evolution of mass scales in inhomogeneities across various background models.

Contribution

It introduces a generalized framework for Swiss-cheese cosmologies incorporating boundary linear momenta, enabling analysis without detailed local inhomogeneity models.

Findings

Mass and size of inhomogeneities depend on boundary linear momenta.

Properties are largely unaffected by background model details.

The approach simplifies studying inhomogeneity evolution in cosmology.

Abstract

We generalize the Swiss-cheese cosmologies so as to include nonzero linear momenta of the associated boundary surfaces. The evolution of mass scales in these generalized cosmologies is studied for a variety of models for the background without having to specify any details within the local inhomogeneities. We find that the final effective gravitational mass and size of the evolving inhomogeneities depends on their linear momenta but these properties are essentially unaffected by the details of the background model.