Horava-Lifshitz cosmology with generalized Chaplygin gas

TL;DR

This paper explores cosmological models combining generalized Chaplygin gas with Horava-Lifshitz gravity, constrained by observational data, and finds the models compatible with the universe's thermal history and current observations.

Contribution

It introduces a comprehensive analysis of generalized Chaplygin gas within Horava-Lifshitz gravity, including observational constraints and evolution of cosmic epochs.

Findings

Model compatible with SNIa, BAO, CMB data

Reproduces radiation, matter, and dark energy epochs

Consistent with Big Bang Nucleosynthesis constraints

Abstract

We investigate cosmological scenarios of generalized Chaplygin gas in a universe governed by Horava-Lifshitz gravity. We consider both the detailed and non-detailed balance versions of the gravitational background, and we include the baryonic matter and radiation sectors. We use observational data from Type Ia Supernovae (SNIa), Baryon Acoustic Oscillations (BAO), and Cosmic Microwave Background (CMB), along with requirements of Big Bang Nucleosynthesis (BBN), to constrain the parameters of the model, and we provide the corresponding likelihood contours. We deduce that the present scenario is compatible with observations. Additionally, examining the evolution of the total equation-of-state parameter, we find in a unified way the succession of the radiation, matter, and dark energy epochs, consistently with the thermal history of the universe.