Constraints on The Dark Energy Equation of State And The Deceleration Parameter From Recent Cosmic Observations

TL;DR

This paper uses recent cosmic observations to constrain dark energy properties and the universe's deceleration, employing a model-independent approach within anisotropic Bianchi type I space-time.

Contribution

It introduces a model-independent parameterization of deceleration and dark energy equations of state to analyze observational data within anisotropic cosmology.

Findings

Transition redshift constraints vary with data sets.

Results support a late-time acceleration transition.

Constraints are consistent with standard cosmological models.

Abstract

We study the constraints on dark energy equation of state $\omega^{X}$ and the deceleration parameter $q$ from the recent observational data including Hubble data and the cosmic microwave background (CMB) radiation by using a model-independent deceleration parameter $q(z)=1/2-a/(1+z)^b$ and dark energy equation of state $\omega^{X}=\omega_{0}+\omega_{1}z/(1+z)$ in the scope of anisotropic Bianchi type I space-time. For the cases of Hubble dataset, CMB data, and their combination, our results indicate that the constraints on transition redshift $z_{\ast}$ are $0.62^{+1.45}_{-0.56}$, $0.34^{+0.13}_{-0.06}$, and $0.60^{+0.20}_{-0.10}$ respectively.