Quintessence Reconstruction of Interacting HDE in a Non-Flat Universe

Abstract

In this paper we consider quintessence reconstruction of interacting holographic dark energy in a non-flat background. As system's IR cutoff we choose the radius of the event horizon measured on the sphere of the horizon, defined as L = ar(t). To this end we construct a quintessence model by a real, single scalar field. Evolution of the potential, V(φ), as well as the dynamics of the scalar field, φ, is obtained according to the respective holographic dark energy. The reconstructed potentials show a cosmological constant behavior for the present time. We constrain the model parameters in a flat universe by using the observational data, and applying the Monte Carlo Markov chain simulation. We obtain the best fit values of the holographic dark energy model and the interacting parameters as c = 1.0576+0.3010+0.3052−0.6632−0.6632 and ζ = 0.2433+0.6373+0.6373−0.2251−0.2251, respectively. From the data fitting results we also find that the model can cross the phantom line in the present universe where the best fit value of the dark energy equation of state is wD = −1.2429.