Study of pressure parametric dark energy model in the framework of f(Q) gravity
Abstract
In this work, we have proposed a simple parametrization for the pressure component p(z) of the dark energy model and have studied the cosmological implications of this model in the framework of f(Q) modified gravity theory, aka, the symmetric teleparallel gravity theory, where Q is known as the nonmetricity scalar. By considering a particular parametric form of p(z), we obtained the Hubble solution for the f(Q) modified gravity model. In order to see whether this model is consistent with or challenges the ΛCDM limits, we tried to put constraints on the model parameters using the recent observational datasets like Hubble data, Cosmic Chronometer data, Type Ia Supernovae (SNIa) data, baryonic acoustic oscillations (BAO) data. We have employed the χ2 minimization technique and have carried out the Markov Chain Monte Carlo (MCMC) analysis using emcee package. We have found that the deceleration parameter shows a smooth transition from positive to negative value in recent past which is essential for the structure formation of the Universe. It has been found that the parametric form of the dark energy pressure parameter is consistent with current cosmological scenario.
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