Eur. Phys. J. C (2012) 72: 2057
https://doi.org/10.1140/epjc/s10052-012-2057-3

Regular Article - Theoretical Physics

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

¹ Department of Physics, Hubei University for Nationalities, Enshi, Hubei, 445000, China
² Department of Physics, Institute of Theoretical Physics, Beijing Normal University, Beijing, 100875, China
³ Department of Basic Teaching, Hunan Institute of Technology, Hengyang, 421002, China

^* e-mail: wbliu@bnu.edu.cn

Received: 13 April 2012
Revised: 23 May 2012
Published online: 3 July 2012

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 ΛCDM model than the linear one. Our work implies that the nonlinear interaction forms should be payed more attention.