Homogeneous isotropic cosmological model in a new scalar-tensor theory

1982 ◽  
Vol 26 (12) ◽  
pp. 3747-3749 ◽  
Author(s):  
A. Banerjee ◽  
N. O. Santos
Keyword(s):  
Cosmological Model ◽  
Scalar Tensor Theory ◽  
Tensor Theory ◽  
Isotropic Cosmological Model

Isotropic Cosmological Model in Generalized Scalar Tensor Theory with Bulk Viscosity

1997 ◽  
Vol 06 (01) ◽  
pp. 119-124 ◽  
Author(s):  
N. Banerjee ◽  
Aroonkumar Beesham
Keyword(s):  
Scalar Field ◽  
Cosmological Model ◽  
Viscous Fluid ◽  
Bulk Viscosity ◽  
Conformal Transformation ◽  
Scalar Tensor Theory ◽  
Bulk Viscous Fluid ◽  
Tensor Theory ◽  
Bulk Viscous ◽  
Isotropic Cosmological Model

In this paper both exponential and power law solutions for the flat Robertson–Walker cosmological model have been derived in a generalized Brans–Dicke theory, where the parameter ω is a function of the scalar field, along with a bulk viscous fluid. The solutions are obtained in Dicke's revised units and these are also given in the original atomic units via the conformal transformation prescribed by Dicke.

scholarly journals Brans - Dicke Cosmology with Causal Viscous Fluid

1996 ◽  
Vol 49 (5) ◽  
pp. 899 ◽  
Author(s):  
N Banerjee ◽  
A Beesham
Keyword(s):  
Scalar Field ◽  
Cosmological Model ◽  
Viscous Fluid ◽  
Exact Solutions ◽  
Power Function ◽  
Causal Theory ◽  
Scale Factor ◽  
Scalar Tensor Theory ◽  
Equilibrium Thermodynamics ◽  
Tensor Theory

Exact solutions for the spatially flat (k = 0) Robertson–Walker cosmological model in Brans–Dicke scalar tensor theory have been obtained in the presence of a causal viscous fluid. It is found that if the scale factor is a power function of the scalar field, then solutions can be obtained in the full causal theory but not in the truncated theory of non-equilibrium thermodynamics.

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