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Some exact solutions of string cosmology in Bianchi III space-time

- R. Tikekar, L. Patel
- Physics
- 1 April 1992

Following the techniques used by Letelier and Stachel some exact Bianchi III cosmological solutions of massive strings in the presence of magnetic field are obtained and their physical features are… Expand

Some Bianchi type VI 0 viscous fluid cosmological models

- L. Patel, S. S. Koppar
- Physics
- 1 July 1991

The Einstein field equations have been solved for Bianchi type VI 0 spacetimes with viscous fluid source. Four cosmological models are derived. They have nonzero expansion and shear. One of them have… Expand

Radiating Kerr metric

- P. C. Vaidya, L. Patel
- Physics
- 15 June 1973

A nonstatic solution of Einstein's equations corresponding to a field of flowing radiation is presented. The solution is algebraically special and contains two shear-free geodetic null congruences.… Expand

Singularity Free Inhomogeneous Cosmological Stiff Fluid Models

- L. Patel, N. Dadhich
- Physics
- 1 February 1993

We present a singularity free class of inhomogeneous cylindrical universes filled with stiff perfect fluid $(\rho = p)$. Its matter free $ (\rho = 0)$ limit yield two distinct vacuum spacetimes which… Expand

A class of stationary rotating string cosmological models

- L. Patel, N. Dadhich
- Physics
- 14 July 1995

We obtain a one parameter class of stationary rotating string cosmological models of which the well-known Gödel universe is a particular case. By suitably choosing the free parameter function, it is… Expand

Some exact solutions in Bianchi VI0 string cosmology

- R. Tikekar, L. Patel
- Physics
- 1 June 1994

Following the techniques used by Letelier and Stachel some new physically relevant explicit Bianchi VI0 solutions of string cosmology with magnetic field are reported. They include two models… Expand

Inhomogeneous cosmological models with heat flux

- L. Patel, R. Tikekar, N. Dadhich
- Physics
- 1 August 1997

We present a general class of inhomogeneous cosmological models filled with non-thermalized perfect fluid by assuming that the background spacetime admits two space-like commuting Killing vectors and… Expand

On Singularity Free Cosmological Models

- N. Dadhich, R. Tikekar, L. Patel
- Physics, Biology
- 15 July 1993

In 1990 Senovilla$^1$ obtained an interestisng cosmological solution of Einstein's equations that was free of the big-bang singularity. It represented an inhomogeneous and anisotropic cylindrical… Expand

On the Kerr–Newman metric in cosmological background

- S. S. Koppar, L. Patel
- Physics
- 1988

Using the method of null tetrad, the Kerr–Newman metric in the background of the Robertson–Walker universe is derived in terms of a metric that is conformal to a generalized Kerr–Schild metric. A new… Expand

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