Ganeshwar Mohanty

On Bianchi Type-I Mesonic Cosmological Model In Bimetric Theory

Anisotropic spatially homogeneous Bianchi type-I cosmological model in bimetric theory of gravitation (Rosen, 1973) is considered. It is shown that the Bianchi type-I cosmological model does not exist in case of both meson field and mesonic perfect fluid (with or without mass parameter). Hence only vacuum models can be obtained (Reddy and Venkateswarlu, 1989).

Some Bianchi Type Cosmological Models in Bimetric Theory

It is shown that anisotropic spatially homogeneous Bianchi types III and VI0 cosmological models do not exist in Rosens [N. Rosen: Gen. Rel. Grav. 4 (1973) 435] bimetric theory when the source of gravitation is governed by either perfect fluid or mesonic perfect fluid. Hence the vacuum models are constructed.

SCALE INVARIANT THEORY FOR BIANCHI TYPE VIII AND IX SPACE-TIMES WITH PERFECT FLUID

AbstractIn this paper we have taken an attempt to study the feasibility of scale invariant theory (Wesson, 1981a,b) in Bianchi type VIII and IX space-times with a time dependent gauge function (Dirac Gauge i.e. βαn

Non-Static Plane Symmetric Cosmological Models in Bimetric Theory

tfrac{1}{t}

Incompatibility of Bianchi Type III Space Time in Scale Invariant Theory

n)and a matter field in the form of a perfect fluid. It is found that Bianchi type VIII (δ=1) space-time is feasible in this theory whereas Bianchi type IX (δ=-1) space-time is not feasible. In this feasible case a radiating model is constructed and its physical behaviour is discussed.

Cosmological models in Barber's second self-creation theory

A class of exact solutions of Eisteins field equations with attractive massive scalar field in LRS Bianchi type I space time is obtained. It is shown that how the dynamical importance of the scalar field and the shear change in the course of evolution.

Vacuum Cosmological Models in Einstein and Barber Theories

The problems of non-static plane symmetric meson field and mesonic perfect fluid in Rosen’s [Gen. Rel. Grav., Vol. 4 (1973) 435] bimetric theory of gravitation are considered. It is observed that plane symmetric non-static cosmological model exists in case of scalar meson field where the scalar field becomes constant. Further it is found that in case of mesonic perfect fluid, the bimetric theory does not admit perfect fluid but allows only mesonic scalar field with constant scalar field. In both the cases a cosmological model with constant scalar field is obtained.

Mesonic Stiff Fluid Distribution In Bianchi Type Space-Times

An attempt has been taken to study the feasibility of scale-invariant theory in Bianchi type VIh space-time with a time dependent gauge function (Dirac gauge) and a matter field in the form of a perfect fluid with isotropic matter pressure. It is found that Bianchi type VIh(h = 1) space-time is feasible in this theory whereas Bianchi type VIh(h = -1) and VIh(h = 0) space-times are not feasible. In the feasible case a non-singular model for the universe filled with disorder radiation is constructed and some of its physical behaviors are studied.