Inconsistences in Interacting Agegraphic Dark Energy Models

TL;DR

This paper investigates the inconsistencies in interacting agegraphic dark energy models, revealing persistent issues with cosmic epoch descriptions and acceleration despite considering interactions.

Contribution

It demonstrates that interaction models do not resolve fundamental inconsistencies in agegraphic dark energy scenarios.

Findings

Interaction does not fix the matter-dominated epoch issue

Radiation/matter epochs conflict with acceleration capability

Parameter constraints can avoid some contradictions

Abstract

It is found that the origin agegraphic dark energy tracks the matter in the matter-dominated epoch and then the subsequent dark-energy-dominated epoch becomes impossible. It is argued that the difficulty can be removed when the interaction between the agegraphic dark energy and dark matter is considered. In the note, by discussing three different interacting models, we find that the difficulty still stands even in the interacting models. Furthermore, we find that in the interacting models, there exists the other serious inconsistence that the existence of the radiation/matter-dominated epoch contradicts the ability of agegraphic dark energy in driving the accelerated expansion. The contradiction can be avoided in one of the three models if some constraints on the parameters hold.