Exact Bianchi-type VIII and IX models in the presence of zero-mass scalar fields are presented, when the source of the gravitational field is a perfect fluid withP=ϱ. Some physical and geometrical properties of the models are also discussed.

Exact Bianchi-type VIII and IX models in the presence of zero-mass scalar fields

An exact Bianchi type-I cosmological model in the presence of zero-mass scalar fields is obtained when the source of the gravitational field is a perfect fluid with pressure equal to energy density. Some properties of the model are discussed.

Bianchi Type-I Universe in the Presence of Zero-Mass Scalar Fields

A non-static plane-symmetric cosmological model in the presence of zero-mass scalar fields is obtained when the source of the gravitational field is a perfect fluid with pressure equal to energy density. Some properties of the model are discussed.

A plane-symmetric universe in the presence of zero-mass scalar fields

Tilted LRS Bianchi type-I cosmological model for perfect fluid distribution coupled with zero–mass scalar field is investigated. Exact solutions to the field equations are derived when the metric potentials are functions of cosmic time only. Some physical and geometrical properties of the solutions are also discussed.

Tilted LRS Bianchi Type-I Mesonic Stiff Fluid Cosmological Model

The Bianchi type-VI0 space-time with strange quark matter attached to string cloud in GR and Brans-Dicke theory of gravitation has been studied. The field equations have been solved by using the anisotropy feature of the universe in Bianchi type-VI0 space-time. Some important features of the models thus obtained have been discussed. We noticed that the presence of scalar field does not affect the geometry of the space-time but it changes the matter distribution.

Cosmological models with strange quark matter attached to string cloud in GR and Brans-Dicke theory of gravitation

Field equations for coupled gravitational and zero mass scalar fields in the presence of a point charge are obtained with the aid of a static spherically symmetric conformally flat metric. A closed from exact solution of the field equations is presented which may be considered as describing the field of a charged particle at the origin surrounded by the scalar meson field in a flat space-time.

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D. R. K. Reddy

Papers

Field of a charged particle in the presence of scalar meson fields in general relativity