Constraining a bulk viscous Bianchi type I dark energy dominated universe with recent observational data

• Published in: Physical review. D 2021-09, Vol.104 (6), p.1, Article 064044
• Main Authors: Yadav, Anil Kumar, Yadav, Avinash K., Singh, Manvinder, Prasad, Rajendra, Ahmad, Nafis, Singh, Kangujam Priyokumar
• Format: Article
• Language: English
• Subjects: Dark energy; Deceleration; Kinematics; Mathematical models; Parameters; Red shift; Universe
• ISSN: 2470-0010; 2470-0029
• DOI: 10.1103/PhysRevD.104.064044

In this paper, we have investigated a bulk viscous universe with dominance of dark energy in Bianchi type I space-time and constrained its parameter with observational H ( z ) data (OHD) and joint OHD and Pantheon compilation of SN Ia data. We constrain Hubble's constant ... and ... km   s− 1 Mpc− 1 by bounding this model with OHD and joint OHD and Pantheon compilation of SN Ia data respectively. These estimated values of H0 have 1.27σ and 1.69σ tension with its corresponding Planck collaboration value. We have constrained the best fit value of model parameter ζ as ... and ... respectively for the above observational datasets. We also have obtained a kinematic expression for deceleration parameter and constrained its present value q 0 = − 0.58 2 + 0.021 − 0.023 and transition redshift ... . Furthermore, we observe that the derived model exhibits the properties of transitioning the universe and its present age is ... Gyrs . The kinematics of the Om(z) parameter and the jerk parameter are also discussed and the analysis of these parameters shows a marginal departure of the derived model from the Λ CDM model of the universe. (ProQuest: ... denotes formulae omitted.).