Quintessence dark energy model in non-linear $f(Q)$ theory with bulk-viscosity

Abstract

In this study, we investigate a locally rotationally symmetric (LRS) Bianchi type-I cosmological model in non-linear form of $f(Q)$ gravity with observational constraints. We solved the modified Einstein's field equations with a viscous fluid source and got a hyperbolic solution. First, we apply MCMC analysis to the cosmic chronometer (CC), Baryon Acoustic Oscillation (BAO) and Pantheon datasets to place observational constraints on the model parameters. Using constrained values of model parameters, we study the behavior of cosmological parameters, such as the Hubble parameter $H$, the deceleration parameter $q$, and the equation of state (EoS) parameter ${\omega }_v$ with the skewness parameter ${\delta }_v$ for the viscous fluid. In addition, we perform the Om diagnostics and statefinder analysis to categorize dark energy models. Also, we studied cosmographic series coefficients to explore the whole evolution of the derived universe model. We estimated the current age of the universe as $t_0\approx 13.8$ Gyrs. We obtained a quintessential and ever-accelerating model with bulk viscosity fluid.

26 pages, 17 figures

References in corpus (36)

• Dynamics of dark energy
• The Confrontation between General Relativity and Experiment
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Disappearing cosmological constant in f(R) gravity
• Modified teleparallel gravity: inflation without inflaton
• Raising the bar: new constraints on the Hubble parameter with cosmic chronometers at z$\sim$2
• Modified f(R) gravity consistent with realistic cosmology: from matter dominated epoch to dark energy universe
• Palatini Approach to Modified Gravity: f(R) Theories and Beyond
• Two new diagnostics of dark energy
• Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Baryon acoustic oscillations with Lyman-$\alpha$ forests
• Extended Gravity Cosmography
• First evidence that non-metricity f(Q) gravity could challenge $\Lambda$CDM
• Baryon acoustic oscillations from the complete SDSS-III Ly$\alpha$-quasar cross-correlation function at $z=2.4$
• Viscous Cosmology for Early- and Late-Time Universe
• Modified Gravity and Cosmology: An Update by the CANTATA Network
• Toward a Better Understanding of Cosmic Chronometers: A new measurement of H(z) at z~0.7
• Cosmographic bounds on the cosmological deceleration-acceleration transition redshift in $f(\mathcal{R})$ gravity
• Does Bulk Viscosity Create a Viable Unified Dark Matter Model?
• New models and Big Bang Nucleosynthesis constraints in $f(Q)$ gravity
• Viscous Ricci Dark Energy
• Exploring a matter-dominated model with bulk viscosity to drive the accelerated expansion of the Universe
• Unifying Einstein and Palatini gravities
• Bulk Viscosity, Decaying Dark Matter, and the Cosmic Acceleration
• Friedmann cosmology with bulk viscosity: a concrete model for dark energy
• Quintom cosmology and modified gravity after DESI 2024
• Non-metricity with bounday terms: $f(Q,C)$ gravity and cosmology
• Observational constraints on the deceleration parameter in a tilted universe
• Characteristic Properties of Two Different Viscous Cosmology Models for the Future Universe
• Quintessence Behaviour of an Anisotropic Bulk Viscous Cosmological Model in Modified $f(Q)$-Gravity
• Transit String Dark Energy Models in $f(Q)$ Gravity
• Anisotropic f(Q) gravity model with bulk viscosity
• Viscous Fluids and Gauss-Bonnet Modified Gravity
• FLRW Cosmology in Metric-Affine $F(R,Q)$ Gravity
• Constrained transit cosmological models in $f(R,L_m,T)$-gravity