http://arxiv.org/abs/1802.04251
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.
H. Amirhashchi and S. Amirhashchi
Wed, 14 Feb 18
25/68
Comments: 10 pages,6 figures, 5tables