Limits on the parameters of the equation of state for interacting dark energy

TL;DR

This paper constrains the parameters of interacting dark energy models by analyzing the equation of state and interaction term, considering variations of the dark energy field since last scattering, thus extending previous studies.

Contribution

It introduces new constraints on dark energy parameters considering interaction with dark matter and field variation limits, expanding prior research.

Findings

Constraints on the equation of state parameter $w$

Limits on the interaction term $Q$

Extended parameter space analysis

Abstract

Under the assumption that cold dark matter and dark energy interact with each other through a small coupling term, $Q$, we constrain the parameter space of the equation of state $w$ of those dark energy fields whose variation of the field since last scattering do not exceed Planck's mass. We use three parameterizations of $w$ and two different expressions for $Q$. Our work extends previous ones.