Document Type : Regular article

Authors

• Praveen Kumar Dhankar ¹
• Adesh Meshram ²
• Rekha Patel ²
• Safiqul Islam ³
• Albert Munyeshyaka ⁴

¹ Symbiosis Institute of Technology, Nagpur Campus, Symbiosis International (Deemed University), Pune-440008, India

² Symbiosis Institute of Technology, Nagpur Campus, Symbiosis International (Deemed University), Pune-440008, Maharashtra, India

³ Department of Mathematics and Statistics, College of Science, King Faisal University, P.O. Box 400, Al Ahsa 31982, Saudi Arabia

⁴ Rwanda Astrophysics, Space and Climate Science Research Group, University of Rwanda, College of Science and Technology, Kigali, Rwanda

Abstract

In this work, we investigate the cosmological dynamics of the $f(Q,T) = \alpha Q + \beta T$ gravity model by considering a time-dependent scale factor as $a(t) = (\sinh(\alpha t))^{1/n}$. The corresponding field equations are solved to obtain the cosmological parameters in terms of redshift. The model parameters are constrained employing observational datasets consisting of Hubble, DESI BAO, and Union3 supernova data using the Markov Chain Monte Carlo (MCMC) method. The physical behavior of the derived model is examined by analysis of the deceleration parameter,pressure, energy density, equation of state parameter, and the \(Om(z)\) diagnostic, while the physical credibility of the model is investigated using the energy conditions. Collectively, the model provides a consistent description of the accelerated expansion of the Universe at late-times and remains compatible based on observational data.

Keywords

• Modified gravity
• $f(Q
• T)$ Gravity
• Data Analysis
• MCMC

Main Subjects

• Physics