Observational insights into the accelerating universe through reconstruction of the deceleration parameter

Abstract

Recent developments in the exploration of the universe suggest that it is in an accelerated phase of expansion. Accordingly, our study aims to probe the current scenario of the universe with the aid of the reconstruction technique. The primary factor that describes cosmic evolution is the deceleration parameter. Here, we provide a physically plausible, newly defined model-independent parametric form of the deceleration parameter. Further, we constrain the free parameters through statistical MCMC analysis for different datasets, including the most recent Pantheon+. With the statistically obtained results, we analyze the dynamics of the model through the phase transition, EoS parameter, and energy conditions. Also, we make use of the tool Om diagnostic to test our model.