Rotating viscous-fluid cosmologies with scalar field and heat flux

The Decay of Massive Scalar Field in Non-Static Gödel Type Universe with Viscous Fluid and Heat Flow

“…The ratio σ θ for our model is considerably greater than its present value. This fact indicates that our solutions represent the early stages of evolution of the universe [20]. Equations (32), (35)- (46) show that the shear coefficient (η) is playing more important role than bulk coefficient (ξ ) in this universe model.…”

“…Koppar and Patel [29,30] have presented some non-static generalizations of Gödel solution which rotating universe with viscous fluid and heat flux. Chakraborty and Bandopadhyay [31] have presented a stationary generalization of Gödel's universe with perfect fluid and a scalar field [20]. Non-static Gödel cosmological model with heat flux and perfect fluid have been studied by Yavuz and Baysal [24].…”

“…In 2003 Mohanty et al [14] studied LRS Bianchi I type universe with attractive massive scalar field in the case of source density model and they have showed that how the dynamical importance of the scalar field and shear change in the course of evolution [14]. Particle physics and high energy astrophysical observations show that the universe is rotating [16][17][18][19][20][21]. A rotating universe with vanishing expansion and shear appeared with the advent of Gödel's universe [20,22].…”

“…Particle physics and high energy astrophysical observations show that the universe is rotating [16][17][18][19][20][21]. A rotating universe with vanishing expansion and shear appeared with the advent of Gödel's universe [20,22]. According to Novello and Reboucas, Gödel published the first cosmological model by a solution of the modified Einstein equations in which a cosmological repulsive term ( g ik ) has been added [23].…”

“…Now, it is well known that the universe is expanding. Therefore, the study and investigation of non-static rotating world models is important [20]. From this reasons we have selected the Gödel universe.…”