Constraints on single entity driven inflationary and radition eras

TL;DR

This paper proposes a unified model combining inflationary and radiation eras using a modified Chaplygin gas, constrained by WMAP7 data, and predicts primordial gravitational wave spectra.

Contribution

It introduces a novel unified framework for inflation and radiation eras based on a modified Chaplygin gas, with observational constraints from WMAP7 data.

Findings

Model fits observational data of scalar perturbations

Predicts primordial gravitational wave spectrum

Provides a smooth transition between inflation and radiation eras

Abstract

We present a model that attempts to fuse the inflationary era and the subsequent radiation dominated era under a unified framework so as to provide a smooth transition between the two. The model is based on a modification of the generalized Chaplygin gas. We constrain the model observationally by mapping the primordial power spectrum of the scalar perturbations to the latest data of WMAP7. We compute as well the spectrum of the primordial gravitational waves as would be measured today.