Agegraphic dark energy with the sign-changeable interaction in non-flat universe

TL;DR

This paper explores an agegraphic dark energy model with a sign-changing interaction in a non-flat universe, showing it can alleviate the coincidence problem and align with observational data.

Contribution

It introduces a novel sign-changeable interaction in the ADE model within a non-flat universe and analyzes its cosmological implications.

Findings

The interaction causes energy flow reversal between dark matter and ADE.

The model includes an accelerated scaling attractor solution.

Results are consistent with current observational data.

Abstract

In this paper, we investigate the agegraphic dark energy (ADE) model by including the sign-changeable interaction between ADE and dark matter in non-flat universe. It is shown that the interaction induces an energy flow of which the direction is first from dark matter to ADE and then from ADE to dark matter. The phase space analysis is made and the critical points are found, one of which is the accelerated scaling attractor solution. So, the coincidence problem can be alleviated. Furthermore, we show the evolution of the density parameter $\Omega$, the deceleration parameter $q$ and the equation of state (EoS) parameter $w_{d}$ of ADE. We also find that our model is consistent with the observational data.