Using Pantheon and Hubble parameter data to constrain the Ricci dark energy in a Bianchi Ⅰ Universe

作者：A Najafi; H Hossienkhani

来源：Communications in Theoretical Physics, 2022, 74(06): 107-116.

In this work,we use the most recent publicly available type Ⅰa supernova(SNIa) compilations and H(z) data.A well formulated cosmological model based on Bianchi type Ⅰ(BI) metric is implemented in the presence of the Ricci dark energy model.Using the maximum likelihood technique,we estimate the present value of Hubble’s constant H0=70.339±0.743,matter density parameter Ωm0=0.297±0.031,anisotropy parameter Ωσ0=-0.004 01 ± 0.001 07 within 1σ′ confidence level by bounding our derived model with recent joint Pantheon and H(z)data.We have constrained the present value of the equation of state parameter as ωde=-1.17 joint with the observational data.The present value of the deceleration parameter of the Universe in the derived model is obtained as q0=-0.749-0.086+0.076.Transition redshift is also derived as ztr～0.551 with the recent observations(Pantheon+H(z)) datasets.Finally,we compare the anisotropy effects on the evolution of H(z) for the proposed model under consideration with different observational datasets.