Modeling cosmic acceleration with a generalized varying deceleration parameter
Koussour M. Myrzakulov N. Alfedeel A.H.A. Awad F. Bennai M.
December 2023Elsevier B.V.
Physics of the Dark Universe
2023#42
Understanding the accelerating expansion of the Universe remains a fundamental challenge in modern cosmology. In this paper, we investigate a cosmological model parametrized by a generalized variable deceleration parameter to elucidate the dynamics driving cosmic acceleration. By employing constraints from the latest observational datasets, including Cosmic Chronometers (CC), Type Ia Supernovae (SNe), and Baryon Acoustic Oscillations (BAO), we assess the compatibility of the model with observational data. The chosen parametrization aligns with thermodynamic constraints on the deceleration parameter, further validating its reliability. Further, we estimate the present value of the Hubble parameter, transition redshift, deceleration parameter, and EoS parameter, which align with observational data. Lastly, our stability analysis confirms the models stability against small perturbations.
Cosmic acceleration , Deceleration parameter , Observational data , Parametrization
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Quantum Physics and Magnetism Team, LPMC, Faculty of Science Ben Msik, Casablanca Hassan II University, Morocco
L. N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics, Astana, 010009, Kazakhstan
Department of Mathematics and Statistics, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, 13318, Saudi Arabia
Department of Physics, Faculty of Science, University of Khartoum, P.O. Box 321, Khartoum, 11115, Sudan
Centre for Space Research, North-West University, Potchefstroom, 2520, South Africa
Department of Mathematics, Omdurman Islamic University, Khartoum, Sudan
Alneelain Center for Mathematical Sciences, Alneelain University, Khartoum, Sudan
Lab of High Energy Physics, Modeling and Simulations, Faculty of Science, University Mohammed V-Agdal, Rabat, Morocco
Quantum Physics and Magnetism Team
L. N. Gumilyov Eurasian National University
Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics
Department of Mathematics and Statistics
Department of Physics
Centre for Space Research
Department of Mathematics
Alneelain Center for Mathematical Sciences
Lab of High Energy Physics
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