A New Cosmological Model: Exploring the Evolution of the Universe and Unveiling Super-Accelerated Expansion

• DOI: 10.2139/ssrn.4543133
• Publication Date: 2023-08-16T22:18:33Z
• Authors: Himanshu Chaudhary; Dhruv Arora; Ujjal Debnath; Ghulam Mustafa; Sunil Kumar Maurya
• Keywords: 13. Climate action; 7. Clean energy

In this paper, we present a cosmological model designed to study the evolution of universe based on new parametrization deceleration parameter. The considers spatially flat, homogeneous, and isotropic FLRW filled with radiation, DM, DE. We derive Friedmann equations energy conservation equation for universe, accounting separate Our proposed parameter is given by formula involving constants $H_{0}$, $\Omega_{r0}$, $\Omega_{m0}$, $q_{2}$, $q_{1}$, $q_{0}$, $\alpha$ $\beta$ which subsequently fit observational data. To assess model's viability, compare it diverse range data, including cosmic chronometers, type Ia supernovae, baryon acoustic oscillations, microwave background measurements. Employing chi-square statistic Markov Chain Monte Carlo (MCMC) method, estimate best-fit values free parameters investigate constraints imposed data model. results indicate that our provides an excellent observed exhibits remarkable agreement standard $\Lambda$CDM paradigm at higher redshifts. However, most intriguing discovery lies in prediction super-accelerated expansion distant future, contrast de Sitter phase predicted $\Lambda$CDM. This implies presence dark driving universe's accelerated expansion. These findings suggest offers compelling alternative paradigm, shedding light nature future fate cosmos.