Comparison Between Anisotropic and Isotropic Dark Energy Models Through Recent Observational Hubble Data $H(Z)$ [CEA]

The aim of this paper is to fit anisotropic bianchi type I and Friedmann-Robertson-Walker dark energy models to the recent observational Hubble data $H(z)$ and compare the results with those obtained from 9 year WMAP as well as Planck (2015) collaboration. First, we generate $(N + 1)$-dimensional {\bf inhomogeneous} and {\bf anisotropic} Lorentzian spacetime in a synchronous coordinate system. Then we derive Friedmann-Robertson-Walker as well as Bianchi type I spacetimes through this general space-time. Using recently $36 H(z)$ Hubble data in the redshift range $.07\leq z\leq 2.36$ and by the aid of Hamiltonian Monte Carlo technique, we generate chains for parameters of two models namely flat FRW and Bianchi type I universes. Generally, we found that as far as we use $H(z)$ dataset, Bianchi type I gives better description of our universe with respect to the flat FRW model at present epoch.

Read this paper on arXiv…

H. Amirhashchi and S. Amirhashchi
Wed, 14 Feb 18

Comments: 10 pages,6 figures, 5tables