New agegraphic dark energy model with the sign-changeable interaction

In this paper, we investigate a cosmological model with the sign-changeable interaction between new agegraphic dark energy (NADE) and dark matter. By analysis it is shown that the equation of state (EoS) of NADE can cross the phantom divide under the condition of the model parameter beta < 0. In addition, we plot the trajectories of the interacting NADE model for different values of the parameters n and beta in the statefinder plane. It is found that the statefinder trajectories can be distinguished by both n and beta. Furthermore, we study the interacting NADE model by means of the w-w' analysis.