Energy conditions bounds and supernovae data

TL;DR

This paper investigates how energy conditions relate to the universe's acceleration by updating bounds and analyzing supernovae data with new statistical methods and a larger supernova dataset.

Contribution

It extends previous work by providing new statistical analyses of $q(z)$ and offering a revised view of energy condition fulfillment using an expanded supernova dataset.

Findings

Refined bounds on energy conditions using supernovae data.

New statistical analysis of $q(z)$ estimates.

Updated understanding of energy condition violations in the universe.

Abstract

The energy conditions play an important role in the description of some important properties of the Universe, including the current accelerating expansion phase and the possible recent phase of super-acceleration. In a recent work we have provided a detailed study of the energy conditions for the recent past by deriving bounds from energy conditions and by making the confrontation of the bounds with supernovae data. Here, we extend and update these results in two different ways. First, by carrying out a new statistical analysis for $q(z)$ estimates needed for the confrontation between the bounds and supernovae data. Second, by providing a new picture of the energy conditions fulfillment and violation in the light of the recently compiled Union set of 307 type Ia supernovae and by using two different statistical approaches.