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Bianchi type-I model with cosmological constant in a generalized scalar-tensor theory of gravitation

Ayan Banerjee, S. B. Duttachoudhury, Narayan Banerjee

Open publisher page 10 citations

Abstract

Bianchi type-I cosmological models are discussed in the Bergmann-Wagoner-Nordtvedt scalar-tensor theory where both the so-called cosmological constant \ensuremath{\Lambda} and the coupling parameter \ensuremath{\omega} are taken to be functions of the scalar field \ensuremath{\varphi}. Exact solutions are obtained in Dicke's revised units assuming a very simple relationship between \ensuremath{\Lambda} and \ensuremath{\varphi}. The properties of the models are discussed in special cases.

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What this paper is about

Bianchi type-I cosmological models are discussed in the Bergmann-Wagoner-Nordtvedt scalar-tensor theory where both the so-called cosmological constant \ensuremath{\Lambda} and the coupling parameter \ensuremath{\omega} are taken to be functions of the scalar field \ensuremath{\varphi}. Exact solutions are obtained in Dicke's revised units assuming a very simple relationship between \ensuremath{\Lambda} and \ensuremath{\varphi}. The properties of the models are discussed in special cases.

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Available abstract

Bianchi type-I cosmological models are discussed in the Bergmann-Wagoner-Nordtvedt scalar-tensor theory where both the so-called cosmological constant \ensuremath{\Lambda} and the coupling parameter \ensuremath{\omega} are taken to be functions of the scalar field \ensuremath{\varphi}. Exact solutions are obtained in Dicke's revised units assuming a very simple relationship between \ensuremath{\Lambda} and \ensuremath{\varphi}. The properties of the models are discussed in special cases.

Key concepts: Physics, Scalar–tensor theory, Mathematical physics, Lambda, Cosmological constant, Omega, Coupling constant, Gravitation

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