Constraints on the Parameterized Deceleration Parameter in FLRW Universe

Abstract

Confirmation of accelerated expansion of the universe probed the concept of dark energy theory, and since then, numerous models have been introduced to explain its origin and nature. The present work is based on reconstructing dark energy by parametrization of the deceleration parameter in the FRW universe filled with radiation, dark matter, and dark energy. We have chosen some well-motivated parametrized models 1-3 in an attempt to investigate the energy density in terms of deceleration parameters by estimating the cosmological parameters with the help of different observational datasets. Also, we have introduced a new model 4 for the parametrization of the deceleration parameter. Then we analyzed the cosmography parameters using the best-fit values of the parameters. Using the information criteria, we have examined the viability of the models.

16 pages, 24 figures, accepted for publication in physica scripta

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Cited by in corpus (5)

• Model-independent study for a quintessence model of dark energy: Analysis and Observational constraints
• Diagnostic and Comparative Analysis of Dark Energy Models with $q(z)$ Parametrizations
• Cosmological Tests of $f(R,G,T)$ Dark Energy Model in FRW Universe
• $f(Q,T)$ gravity: From early to late-time cosmic acceleration
• Revisiting kink-like parametrization and constraints using OHD/Pantheon+/BAO samples