The accelerated scaling attractor solution of the interacting agegraphic dark energy in Brans-Dicke theory

TL;DR

This paper explores how interacting agegraphic dark energy models within Brans-Dicke theory can produce accelerated scaling attractor solutions, with nonlinear interactions aligning more closely with standard cosmology than linear ones.

Contribution

It introduces new forms of dark sector coupling in interacting agegraphic dark energy models within Brans-Dicke theory and compares their cosmological behaviors.

Findings

Accelerated scaling attractor solutions exist in all models.

Nonlinear interaction models better match the standard $\\Lambda$CDM evolution.

Models are consistent with observational data.

Abstract

We investigate the interacting agegraphic dark energy in Brans-Dicke theory and introduce a new series general forms of dark sector coupling. As examples, we select three cases involving a linear interaction form (Model I) and two nonlinear interaction form (Model II and Model III). Our conclusions show that the accelerated scaling attractor solutions do exist in these models. We also find that these interacting agegraphic dark energy modes are consistent with the observational data. The difference in these models is that nonlinear interaction forms give more approached evolution to the standard $\Lambda$CDM model than the linear one. Our work implies that the nonlinear interaction forms should be payed more attention.