A Magnetized Dark Energy Type R/W Model with Polytropic Equation of State in Brans-Dicke Theory

Abstract

In this paper, we study the spatially homogeneous Robertson-Walker cosmological models with magnetized isotropic dark energy like fluid in the scalar-tensor theory of gravitation proposed by Brans-Dicke. Variable cosmological constant ᴧ and Polytropic equation of state have been used to find exact solutions of the models with volumetric expansion and power-law relation. The Physical and dynamical behaviors of the models have been discussed using some physical quantities like energy density, pressure, and coefficient of bulk viscosity.

Bianchi Type-<i>VI</i>₀ Cosmological Model with Special Form of Scale Factor in Sen-Dunn Theory of Gravitation

“…/ (36) From eqs. (19), (27), (28), and (33) the energy density, the EoS parameter and the skewness parameter are obtained as…”

“…Investigation of the Kantowaski-Sachs cosmological model with bulk viscous and cosmic string in f(T) gravity framework is done by Bhoyar et al [26]. Recently, Dewri [27] studied the spatially homogeneous Robertson-Walker cosmological models with magnetized isotropic dark energy like fluid in the scalar-tensor theory of gravitation. Brahma and Dewri [28] also worked on a paper Bianchi Type -V Modified ( , ) model in Lyra manifold, that approach the ɅCDM ( Lambda cold dark matter) model.…”

Role of <i>f</i>(<i>R,T</i>) Gravity in Bianchi Type-V Dark Energy Model with Electromagnetic Field based on Lyra Geometry

“…The magnetic field [35][36][37] found in both galactic and intergalactic space has played a significant role in understanding the distribution of energy in the Universe. Numerous authors have explored the influence of magnetic fields on cosmological development in diverse circumstances, both theoretically and practically [38][39][40][41][42][43][44][45][46]; Melvin [47] has also revealed that matter was strongly ionized and seamlessly associated with the field during the development of the Universe.…”