Scalar field dark energy: insights into cosmological evolution and black hole accretion

Koussour M. Sekhmani Y. Alfedeel A.H.A. Awad F. Myrzakulov N.
November 2023 Springer Science and Business Media Deutschland GmbH

European Physical Journal Plus
2023 #138 Issue 11

We propose a novel approach to parameterize the equation of state for Scalar Field Dark Energy (SFDE) and use it to derive analytical solutions for various cosmological parameters. Using statistical MCMC with Bayesian techniques, we obtain constraint values for the model parameters and analyze three observational datasets. We find a quintessence-like behavior for Dark Energy (DE) with positive values for both model parameters α and β . Our analysis of the CC+BAO+SNe datasets reveals that the transition redshift and the current value of the deceleration parameter are ztr=0.73-0.01+0.03 and q0=-0.44-0.02+0.03 , respectively. We also investigate the fluid flow of accretion SFDE around a Black Hole (BH) and analyze the nature of the BH’s dynamical mass during accretion, taking into account Hawking radiation and BH evaporation. Our proposed model offers insight into the nature of DE in the Universe and the behavior of BHs during accretion.

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Quantum Physics and Magnetism Team, LPMC, Faculty of Science Ben M’sik, Casablanca Hassan II University, Casablanca, Morocco
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 Univerity, Khartoum, Sudan
Alneelain Center for Mathematical Sciences, Alaneelain University, Kartoum, Sudan
L. N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan

Quantum Physics and Magnetism Team
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
L. N. Gumilyov Eurasian National University

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