Cylindrically symmetric inhomogeneous cosmological models with viscous fluid and varying Λ

Abstract

Cylindrically symmetric non-static cosmological models representing a bulk viscous fluid distribution have been obtained which are inhomogeneous and anisotropic. Without assuming any adhoc law, we obtain a cosmological constant as a decreasing function of time. Various physical and geometrical features of the models are also discussed. : 98.80.Es, PACS

Magnetized string cosmological model in cylindrically symmetric inhomogeneous universe with time dependent cosmological-term lambda

“…Inhomogeneous cylindrically symmetric cosmological models have significant contribution in understanding some essential features of the universe such as the formation of galaxies during the early stages of their evolution. Bali and Tyagi [36] and Pradhan et al [37,38] have investigated cylindrically symmetric inhomogeneous cosmological models in presence of electromagnetic field. Barrow and Kunze [39,40] found a wide class of exact cylindrically symmetric flat and open inhomogeneous string universes.…”

Study of a new class of cylindrically symmetric space-time in general relativity

“…Inhomogeneous cylindrically symmetric cosmological models have significant contribution in understanding some essential features of the universe such as the formation of galaxies during the early stages of their evolution. Bali and Tyagi (1989) and Pradhan et al (2001Pradhan et al ( , 2006 have investigated cylindrically symmetric inhomogeneous cosmological models in presence of electromagnetic field. Barrow andKunze (1997, 1998) found a wide class of exact cylindrically symmetric flat and open inhomogeneous string universes.…”

A new class of Inhomogeneous string cosmological models in general relativity

“…Inhomogeneous cylindrically symmetric cosmological models have significant contribution in understanding some essential features of the universe such as the formation of galaxies during the early stages of their evolution. Bali and Tyagi (1989) and Pradhan et al (2001Pradhan et al ( , 2006 have investigated cylindrically symmetric inhomogeneous cosmological models in presence of electromagnetic field. Kunze (1997, 1998) found a wide class of exact cylindrically symmetric flat and open inhomogeneous string universes.…”