Effect of anisotropy on the generalized Chaplygin gas scalar field and its interaction with other dark energy models
Department of Physics, Hamedan Branch, Islamic Azad University, Hamedan, Iran
* e-mail: email@example.com
Accepted: 23 March 2017
Published online: 27 April 2017
In this work, we establish a correspondence between the interacting holographic, new agegraphic dark energy and generalized Chaplygin gas model in Bianchi type I universe. Then, we reconstruct the potential of the scalar field which describes the generalized Chaplygin cosmology. Cosmological solutions are obtained when the kinetic energy of the phantom field is of the order of the anisotropy and dominates over the potential energy of the field. We investigate observational constraints on the generalized Chaplygin gas, holographic and new agegraphic dark energy models as the unification of dark matter and dark energy, by using the latest observational data. To do this we focus on observational determinations of the expansion history H(z) . It is shown that the HDE model is better than the NADE and generalized Chaplygin gas models in an anisotropic universe. Then, we calculate the evolution of density perturbations in the linear regime for three models of dark energy and compare with the results of the CDM model. Finally, the analysis shows that the increase in anisotropy leads to more correspondence between the dark energy scalar field model and observational data.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2017