Transit String Dark Energy Models in $f(Q)$ Gravity

Abstract

In this paper, we have investigated an anisotropic cosmological model in $f(Q)$ gravity with string fluid in LRS Bianchi type-I universe. We have considered the arbitrary function $f(Q)=Q+\alpha \sqrt{Q}+2\Lambda$ where $\alpha$ is model free parameter and $\Lambda$ is the cosmological constant. We have established a relationship between matter energy density parameter ${\Omega }_m$ and dark energy density parameter ${\Omega }_{\Lambda }$ through Hubble function using using constant equation of state parameter $\omega$. We have made observational constraint on the model using ${\chi }^2$-test with observed Hubble datasets $H(z)$ and SNe Ia datasets, and obtained the best fit values of cosmological parameters. We have used these best fit values in the result and discussion. We have discussed our result with cosmographic coefficients and found a transit phase dark energy model. Also, we analyzed the Om diagnostic function for anisotropic universe and found that our model is quintessence dark energy model.

24 pages, 12 Figures

References in corpus (22)

• Dynamics of dark energy
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
• 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
• Large Scale Structure as a Probe of Gravitational Slip
• Modified gravity models of dark energy
• Cosmography of f(R) gravity
• Cosmographic bounds on the cosmological deceleration-acceleration transition redshift in $f(\mathcal{R})$ gravity
• Cosmography in $f(Q)$ gravity
• Unifying Einstein and Palatini gravities
• Traversable wormholes in $f(R)$ gravity with constant and variable redshift functions
• Model-independent reconstruction of $f(T)$ teleparallel cosmology
• Connecting early and late universe by $f(R)$ gravity
• Cosmography of f(R) - brane cosmology
• Model-Independent Constraints on Lorentz Invariance Violation via the Cosmographic Approach
• Backreaction and FRW consistency conditions

Cited by in corpus (1)

• Non-exotic static spherically symmetric thin-shell wormhole solution in $f(Q,T)$ gravity