Cosmological models with variable cosmological and gravitational ``constants'' and bulk viscous models
A viscous model with variable gravitational and cosmological constants is considered in Robertson-Walker-Friedmann (FRW) spacetime and several solutions are obtained. These solutions are of power law-type. In contrast to \textit{A. Beesham's} solution with \(n={1\over 2}\) [Phys. Rev. D 48, No. 8, 3539-3543 (1993)], these solutions satisfy the relation between bulk viscosity \(\eta\) and matter density \(\rho\) as \(\eta\propto\rho^n\) for any value of \(n\).
variable gravitational and cosmological constants
scientific article; zbMATH DE number 987749