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Cosmic acceleration with bulk viscosity in an anisotropic $f(R,L_m)$ background by Solanki, Raja; Patel, Bina; Jaybhaye, Lakhan V.; Sahoo, P. K. is a scholarly article available to read on EtoBox.

What is Cosmic acceleration with bulk viscosity in an anisotropic $f(R,L_m)$ background about?

In this article, we investigate the observed cosmic acceleration in the framework of a cosmological $f(R,L_m)$ model dominated by bulk viscous matter in an anisotropic background. We consider the LRS Bianchi type I metric and derive the Friedmann equations that drive the gravitational interactions in $f(R,L_m)$ gravity. Further, we assume the functional form $f(R,L_m)=\frac{R}{2}+L_m^\alpha $, where $\alpha$ is a free model parameter, and then find the exact solutions of fields equations corresponding to our viscous matter dominated model. We incorporate the updated H(z) data and the Pantheon data to acquire the best-fit values of parameters of our model by utilizing the $\chi^2$ minimization technique along with the Markov Chain Monte Carlo (MCMC) random sampling method. Further, we present the behavior of physical parameters that describe the universe's evolution phase, such as density, effective pressure and EoS parameters, skewness parameter, and the statefinder diagnostic parameters. We found that the energy density indicates expected positive behavior, whereas the negative behavior of bulk viscous pressure contributes to the universe's expansion. The effective EoS parameter f

Author

Solanki, Raja; Patel, Bina; Jaybhaye, Lakhan V.; Sahoo, P. K.

Published

2023

Language

EN