2025/02/21 by Partha Sarathi Debnath, Chanchal Mondal, B. C. Paul +1
Physics and Astronomy · #Cosmology and Gravitation Theories #Relativity and Gravitational Theory #Black Holes and Theoretical Physics
paper · doi:10.1142/s0219887825501385
Bulk viscous cosmological models are presented in the teleparallel ([Formula: see text], where [Formula: see text] denotes torsion) gravity. In the teleparallel gravity, the Lagrangian of the gravitational action contains a general function [Formula: see text], where [Formula: see text], [Formula: see text] and [Formula: see text] are dimensional constants. Cosmological solutions in Eckart theory and Truncated Israel Stewart theory are talked about in [Formula: see text] gravity form which is one of the most generalized gravity forms in the torsional gravity. The substantial and geometrical prospectives of the cosmological models in Eckart theory and Truncated Israel Stewart theory in [Formula: see text] gravity are deliberated for flat Friedmann–Robertson–Walker space-time. Dynamical analyses of the fixed points of exponential expansion in [Formula: see text] with bulk viscous cosmological models are studied here. The characteristics of the various cosmological parameters such as bulk viscous pressure, energy density, scale factor, Hubble parameter and entropy evolution are studied in Power law and Exponential models. Stability analysis of the exponential models is also argued with cosmic growth in the relevant theories by using directional plots. The cosmological models are supported by observations results.