Anisotropic dark energy model with a hybrid scale factor
Abstract
Anisotropic dark energy model with dynamic pressure anisotropies along different spatial directions is constructed at the backdrop of a spatially homogeneous diagonal Bianchi type space-time in the framework of General Relativity. A time varying deceleration parameter generating a hybrid scale factor is considered to simulate a cosmic transition from early deceleration to late time acceleration. We found that the pressure anisotropies along the and axes evolve dynamically and continue along with the cosmic expansion without being subsided even at late times. The anisotropic pressure along the axis becomes equal to the mean fluid pressure. At a late phase of cosmic evolution, the model enters into a phantom region. From a state finder diagnosis, it is found that the model overlaps with CDM at late phase of cosmic time.
Cite
@article{arxiv.1507.03515,
title = {Anisotropic dark energy model with a hybrid scale factor},
author = {B. Mishra and S. K. Tripathy},
journal= {arXiv preprint arXiv:1507.03515},
year = {2017}
}