Modeling of Accelerating Universe with Bulk Viscous Fluid in Bianchi V Space‐Time

• Published in: Fortschritte der Physik 2021-06, Vol.69 (6), p.n/a
• Main Authors: Goswami, G. K., Yadav, Anil Kumar, Mishra, B., Tripathy, S. K.
• Format: Article
• Language: English
• Subjects: Astronomical models; bulk viscous; dark energy; deceleration parameter; Measuring instruments; Parameters; Universe; Viscous fluids
• ISSN: 0015-8208; 1521-3978
• DOI: 10.1002/prop.202100007

In this paper, we have investigated a bulk viscous anisotropic Universe and constrained its model parameters with recent H(z) and Pantheon compilation data. Using cosmic chronometric technique, we estimate the present value of Hubble's constant as H0=69.39±1.54kms−1Mpc−1, 70.016±1.65kms−1Mpc−1 and 69.36±1.42kms−1Mpc−1 by bounding our derived model with recent H(z) data, Pantheon and joint H(z) and Pantheon data respectively. The present age of the Universe is specified as t0=0.9796H0−1∼13.79 Gyrs. The model favours a transitioning Universe with the transition red‐shift as zt=0.73. We have reconstructed the jerk parameter using the observational data sets. From the analysis of the jerk parameter, it is observed that, our derived model shows a marginal departure from the concordance ΛCDM model. An investigation is presented on a bulk viscous anisotropic universe. The authors constrained the model parameters with recent H(z) and Pantheon compilation data. Using cosmic chronometric technique, the present numerical value of Hubble's constant is estimated by bounding the derived model with recent data. The present age of the Universe is specified and the jerk parameter is reconstructed using the observational data sets. From the analysis it is observed that the derived model shows a marginal departure from the concordance ΛCDM model.