Bulk viscous cosmological model in $f(R,T)$ theory of gravity

Abstract

In this paper, we have presented bulk viscous cosmological model of the universe in the modified gravity theory in which the Lagragian of the gravitational action contains a general function $f(R,T)$, where $R$ and $T$ denote the curvature scalar and the trace of the energy-momentum tensor respectively, in the framework of a flat Friedmann-Robertson-Walker model with isotropic fluid. We obtain cosmological solution in $f(R,T)$ theory of gravity, specially of particular choice $f(R,T)=R+2\lambda T$, where $\lambda$ is a constant, in the presence of bulk viscosity that are permitted in Eckart theory, Truncated Israel Stewart theory and Full Israel Stewart theory. The physical and geometrical properties of the models in Eckart, Truncated Israel Stewart theory and Full Israel Stewart theory are studied in detail. The analysis of the variation of bulk viscous pressure, energy density, scale factor, Hubble parameter and deceleration parameter with cosmic evolution are done in the respective theories. The models are analyzed by comparison with recent observational data. The cosmological models are compatible with observations.

20 pages, 11 figures

References in corpus (14)

• Dynamics of dark energy
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• f(R,T) gravity
• Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
• Modified f(R) gravity consistent with realistic cosmology: from matter dominated epoch to dark energy universe
• The Cosmology of Modified Gauss-Bonnet Gravity
• Viscous Cosmology for Early- and Late-Time Universe
• Bulk Viscous Cosmology
• Emergent Universe with Exotic Matter
• Friedmann model with viscous cosmology in modified $f(R,T)$ gravity theory
• Quantum Cosmology of $f(R,T)$ gravity
• Viscous Dark Cosmology with Account of Quantum Effects
• Inflationary universe in terms of a van der Waals viscous fluid
• Characteristic Properties of Two Different Viscous Cosmology Models for the Future Universe

Cited by in corpus (9)

• The effect of $f(R,T)$ modified gravity on mass and radius of pulsar HerX1
• Neutron stars in $f(R,T)$ gravity with conserved energy-momentum tensor: Hydrostatic equilibrium and asteroseismology
• Moment of inertia of slowly rotating anisotropic neutron stars in $f(R,T)$ gravity
• Moment of inertia and compactness of quark stars within the context of $f(R,T,L_m)$ gravity
• Neutron Stars In $f(R,T)$ Theory: Slow Rotation Approximation
• Effect of bulk viscosity in cosmic acceleration
• Cosmological Study in Myrzakulov $F(R,T)$ Quasi-dilaton Massive Gravity
• Cosmological constraints in symmetric teleparallel gravity with bulk viscosity
• Metric-Affine Myrzakulov Gravity Theories