A comprehensive parametrization approach for the Hubble parameter in scalar field dark energy models
Koussour M. Myrzakulov N. Myrzakulova S. Sofuoğlu D.
December 2023Elsevier B.V.
Results in Physics
2023#55
This study proposes a novel parametrization approach for the dimensionless Hubble parameter i.e. E2(z)=A(z)+β(1+γB(z)) in the context of scalar field dark energy models. The parametrization is characterized by two functions, A(z) and B(z), carefully chosen to capture the behavior of the Hubble parameter at different redshifts. We explore the evolution of cosmological parameters, including the deceleration parameter, density parameter, and equation of state parameter. Observational data from Cosmic Chronometers (CC), Baryonic Acoustic Oscillations (BAO), and the Pantheon＋ datasets are analyzed using MCMC methodology to determine model parameters. The results are compared with the standard ΛCDM model using the Planck observations. Our approach provides a model-independent exploration of dark energy, contributing to a comprehensive understanding of late-time cosmic acceleration.
Cosmic acceleration , Dark energy , Deceleration parameter , Hubble parameter , Observational constraints , Scalar field
Text of the article Перейти на текст статьи
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 Physics, Istanbul University, Vezneciler 34134, Fatih, Istanbul, Turkey
Quantum Physics and Magnetism Team
L. N. Gumilyov Eurasian National University
Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics
Department of Physics
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026