Inhomogeneous Chaplygin Gas Cosmology

TL;DR

This paper reexamines the unification of dark matter and dark energy via the Chaplygin gas, showing it evolves into a mixed system consistent with observed cosmic microwave background data.

Contribution

It introduces a generalized spherical model including acoustic horizon effects, demonstrating the evolution into a cold dark matter condensate and matching observational spectra.

Findings

Chaplygin gas evolves into a mixed dark matter and dark energy system

Model reproduces observed CMB angular power spectrum

Supports unification hypothesis with observational consistency

Abstract

The hypothesis that dark matter and dark energy are unified through the Chaplygin gas is reexamined. Using a generalization of the spherical model which incorporates effects of the acoustic horizon we show that an initially perturbative Chaplygin gas evolves into a mixed system containing cold dark matter in the form of gravitational condensate. Furthermore, we demonstrate that the observed CMB angular and baryonic power spectra are reproduced.