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Cosmological Consequences of a Parametrized Equation of State

1
Department of Mathematics, COMSATS University Islamabad Lahore-Campus, Lahore-54000, Pakistan
2
Division of Human Support System, Faculty of Symbiotic Systems Science, Fukushima University, Fukushima 960-1296, Japan
3
Department of Statistics, COMSATS University Islamabad, Lahore-Campus, Lahore-54000, Pakistan
*
Author to whom correspondence should be addressed.
Symmetry 2019, 11(8), 1009; https://doi.org/10.3390/sym11081009
Received: 24 May 2019 / Revised: 9 July 2019 / Accepted: 16 July 2019 / Published: 5 August 2019
(This article belongs to the Special Issue Cosmological Inflation, Dark Matter and Dark Energy)
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Abstract

We explore the cosmic evolution of the accelerating universe in the framework of dynamical Chern–Simons modified gravity in an interacting scenario by taking the flat homogeneous and isotropic model. For this purpose, we take some parametrizations of the equation of state parameter. This parametrization may be a Taylor series extension in the redshift, a Taylor series extension in the scale factor or any other general parametrization of ω . We analyze the interaction term which calculates the action of interaction between dark matter and dark energy. We explore various cosmological parameters such as deceleration parameter, squared speed of sound, Om-diagnostic and statefinder via graphical behavior. View Full-Text
Keywords: dynamical Chern–Simons modified gravity; parametrizations; cosmological parameters dynamical Chern–Simons modified gravity; parametrizations; cosmological parameters
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Jawad, A.; Rani, S.; Saleem, S.; Bamba, K.; Jabeen, R. Cosmological Consequences of a Parametrized Equation of State. Symmetry 2019, 11, 1009.

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