Constraining a hyperbolic cosmological model with observational data
Koussour M. Bekov S. Altaibayeva A. Holmurodov F. Muminov S. Rayimbaev J.
October 2024Elsevier B.V.
Chinese Journal of Physics
2024#91445 - 457 pp.
In this study, we investigate the dynamic evolution of the universe through a hyperbolic cosmological model based on a spatially flat FLRW metric. By using observational datasets, including CC, Pantheon+, and BAO datasets, we constrain model parameters and examine distinct characteristics, such as the transition in the deceleration parameter. The transition redshifts are zt=0.74−0.30+0.28, zt=0.33−0.02+0.02, and zt=0.36−0.03+0.03 for the CC, Pantheon+, and BAO datasets, respectively. Also, the present values of the deceleration parameter are determined to be q0=−0.38−0.06+0.06, q0=−0.27−0.11+0.10, and q0=−0.29−0.01+0.01 for the CC, Pantheon+, and BAO datasets, respectively. Our findings indicate quintessence-like behavior and suggest potential deviations from standard cosmological expectations. The hyperbolic model emerges as a compelling alternative, underscoring its compatibility with quintessence scenarios and shedding light on the nature of dark energy and the universes destiny.
Dark energy , Deceleration parameter , FLRW metric , Hyperbolic cosmological model , Observational constraints , Quintessence , Transition redshift
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Department of Physics, University of Hassan II Casablanca, Morocco
Department of General and Theoretical Physics, L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Kozybayev University, Petropavlovsk, 150000, Kazakhstan
Faculty of Mathematics, Namangan State University, Boburshoh str. 161, Namangan, 160107, Uzbekistan
Institute of Fundamental and Applied Research, National Research University TIIAME, Kori Niyoziy 39, Tashkent, 100000, Uzbekistan
Urgench State University, Kh. Alimjan str. 14, Urgench, 221100, Uzbekistan
Faculty of Computer Engineering, University of Tashkent for Applied Sciences, Gavhar Str. 1, Tashkent, 700127, Uzbekistan
Shahrisabz State Pedagogical Institute, Shahrisabz Str. 10, Shahrisabz, 181301, Uzbekistan
Tashkent State Technical University, University Str. 1, Tashkent, 100095, Uzbekistan
Department of Physics
Department of General and Theoretical Physics
Kozybayev University
Faculty of Mathematics
Institute of Fundamental and Applied Research
Urgench State University
Faculty of Computer Engineering
Shahrisabz State Pedagogical Institute
Tashkent State Technical University
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