Two Fluid Scenario in Bianchi Type-I Universe

2019/07/31 by G. K. Goswami, Meena Mishra, Anil Kumar Yadav +1
Physics and Astronomy · #gr-qc

paper · pdf · doi:10.1142/s0217732320500868

published as Modern Physics Letters A, Vol. 33, No. 1 (2020) 2050086 (14 pages) · 10 pages, 8 figures

arxiv created 2019/08/26 · arxiv updated 2021/08/03

Abstract

In this paper, we study a Bianchi type -I model of universe filled with barotropic and dark energy(DE) type fluids. The present values of cosmological parameters such as Hubble constant H₀, barotropic, DE and anisotropy energy parameters (Ω_m)₀, (Ω_de)₀ and (Ω_σ)₀ and Equation of State(EoS) parameter for DE (ω_de) are statistically estimated in two ways by taking 38 point data set of Hubble parameter H(z) and 581 point data set of distance modulus of supernovae in the range 0≤ z ≤ 1.414. It is found that the results agree with the Planck result [P.A.R. Ade, et al., Astron. Astrophys. 594 A14 (2016)] and more latest result obtained by Amirhashchi and Amirhashchi [H. Amirhashchi and S. Amirhashchi, arXiv:1811.05400v4 (2019)]. Various physical properties such as age of the universe, deceleration parameter etc have also been investigated.

Citations

• Recovering \LambdaCDM model from a cosmographic study