Impact of dark energy on the equation of state in light of the latest cosmological data
Myrzakulov N. Koussour M. Alfedeel A.H.A. Hassan E.I.
1 September 2023Physical Society of Japan
Progress of Theoretical and Experimental Physics
2023#2023Issue 9
We reconstruct the effective equation of state (EoS) within the framework of the general theory of relativity in a homogeneous and isotropic Friedmann-Lemaître-Robertson-Walker universe, which is assumed to be composed of matter and dark energy (DE). Our analysis employs a dataset consisting of 31 cosmic chronometer data points, six data points of baryon acoustic oscillations, and 1048 type Ia supernovae from the Pantheon sample, and we determine the best-fitting values of the model parameters through Markov chain Monte Carlo simulation. We then use these parameter values to calculate various cosmological parameters, such as the DE EoS parameter, the energy density, the deceleration parameter, the state-finder parameters, and the Om(z) diagnostic. All the analyzed cosmological parameters show behavior consistent with the accelerated universe scenario.
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L. N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics, Astana, 010009, Kazakhstan
Quantum Physics and Magnetism Team, LPMC, Faculty of Science Ben Msik, Casablanca Hassan II University, Casablanca, 9167, Morocco
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, PO Box 321, Khartoum, 11115, Sudan
Centre for Space Research, North-West University, Potchefstroom, 2520, South Africa
L. N. Gumilyov Eurasian National University
Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics
Quantum Physics and Magnetism Team
Department of Mathematics and Statistics
Department of Physics
Centre for Space Research
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