Vacuum bianchi type V and VI0 cosmological models in a new scalar-tensor theory of gravitation

1989 ◽  
Vol 161 (1) ◽  
pp. 125-131 ◽  
Author(s):  
R. Venkateswarlu ◽  
D. R. K. Reddy
Keyword(s):  
Bianchi Type ◽  
Cosmological Models ◽  
Scalar Tensor Theory ◽  
Tensor Theory ◽  
Theory Of Gravitation ◽  
Type V ◽  
Bianchi Type V

Exact Brans-Dicke-Bianchi type-V solutions

1984 ◽  
Vol 96 (1) ◽  
pp. 183-189 ◽  
Author(s):  
D. Lorenz-Petzold
Keyword(s):  
Exact Solutions ◽  
Bianchi Type ◽  
Scalar Tensor Theory ◽  
Stiff Matter ◽  
Tensor Theory ◽  
Homogeneous Cosmological Models ◽  
Theory Of Gravitation ◽  
Spatially Homogeneous ◽  
Type V ◽  
Bianchi Type V

AbstractSpatially homogeneous cosmological models of the Bianchi type-V are considered in the Brans-Dicke scalar-tensor theory of gravitation. Exact solutions are given in the vacuum case as well as for models filled with dust, radiation or stiff matter.

scholarly journals LRS Bianchi type-V universe with variable modified Chaplygin gas in a scalar–tensor theory of gravitation

2016 ◽  
Vol 94 (6) ◽  
pp. 578-582 ◽  
Author(s):  
M. Vijaya Santhi ◽  
V.U.M. Rao ◽  
Y. Aditya
Keyword(s):  
Bianchi Type ◽  
Chaplygin Gas ◽  
Scalar Tensor Theory ◽  
Modified Chaplygin Gas ◽  
Tensor Theory ◽  
Variable Modified Chaplygin Gas ◽  
Theory Of Gravitation ◽  
Bianchi Type V Universe ◽  
Type V ◽  
Bianchi Type V

The spatially homogeneous and anisotropic LRS Bianchi type-V Universe filled with variable modified Chaplygin gas in the framework of the Brans–Dicke (Brans and Dicke. Phys. Rev. 124, 925 (1961). doi:10.1103/PhysRev.124.925) scalar–tensor theory of gravitation has been studied. To obtain a determinate solution of the field equations we have used the condition that scalar field ([Formula: see text]) is a function of average scale factor. Some physical and kinematical properties of the model are discussed. We have also analyzed the stability of the solution.

Exact Bianchi type-V perfect fluid cosmological models in Brans–Dicke theory of gravitation

2008 ◽  
Vol 315 (1-4) ◽  
pp. 211-214 ◽  
Author(s):  
V. U. M. Rao ◽  
T. Vinutha ◽  
M. Vijaya Shanthi ◽  
K. V. S. Sireesha
Keyword(s):  
Perfect Fluid ◽  
Bianchi Type ◽  
Cosmological Models ◽  
Theory Of Gravitation ◽  
Type V ◽  
Bianchi Type V

scholarly journals Bianchi Types II, VIII, and IX String Cosmological Models in Brans-Dicke Theory of Gravitation

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
V. U. M. Rao ◽  
M. Vijaya Santhi
Keyword(s):  
Energy Density ◽  
Cosmological Model ◽  
Bianchi Type ◽  
Cosmological Models ◽  
Scalar Tensor Theory ◽  
Tensor Theory ◽  
Geometrical Features ◽  
Viii And Ix ◽  
Theory Of Gravitation ◽  
Bianchi Types

Bianchi types II, VIII, and IX string cosmological models are obtained and presented in a scalar-tensor theory of gravitation proposed by Brans and Dicke (1961) for λ+ρ=0. We also established the existence of only Bianchi type IX vacuum cosmological model for λ=ρ, where λ and ρ are tension density and energy density of strings, respectively. Some physical and geometrical features of the models are also discussed.

The general vacuum Bianchi type-V solution in the Brans-Dicke theory

1984 ◽  
Vol 95 (1) ◽  
pp. 175-178 ◽  
Author(s):  
D. Lorenz-Petzold
Keyword(s):  
Bianchi Type ◽  
Coupling Parameter ◽  
A Priori ◽  
Scalar Tensor Theory ◽  
Theory Of Relativity ◽  
General Theory Of Relativity ◽  
Tensor Theory ◽  
General Vacuum ◽  
Type V ◽  
Bianchi Type V

Amongst the various modifications of the general theory of relativity (GRT), the scalar-tensor theory of Brans and Dicke (BDT) is treated most seriously ([2], [17], [13]). The BDT is consistent with observations as long as the coupling parameter ω between the scalar and tensor components of gravitation is about equal to or greater than 500 [18]. However, there are no a priori theoretical reasons for excluding other values of ω. In the limit ω → ∞, the BDT reduces to the GRT for a constant BDT-scalar field Φ

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