Anisotropic universe models in Brans–Dicke theory

Sharif, M.; Waheed, Saira

doi:10.1140/epjc/s10052-012-1876-6

Cited by 72 publications

(64 citation statements)

References 43 publications

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“…First, it should be stressed that recently in [26], the f (R, T ) theories have been interpreted as a generalization of the Brans-Dicke model [52][53][54][55][56]. As argued by the authors in [26], the extra terms in the f (R, T ) FEs may play the role of additional terms of effective gravitational and cosmological "constants" G eff and eff .…”

Section: Another Further Work May Rise From An Alternative Form For Fmentioning

confidence: 99%

A complete cosmological scenario from $$f(R,T^{\phi })$$ f ( R , T ϕ )

Moraes¹,

Santos²

2016

Eur. Phys. J. C

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Recent elaborated by Harko et al., the f (R, T ) theories of gravity allow one to contemplate an optimistic alternative to dark energy, for which R and T stand for the Ricci scalar and the trace of the energy-momentum tensor, respectively. Although the literature has shown that the T dependence on the gravitational part of the action -which is due to the consideration of quantum effects -may induce some novel features in the scope of late-time cosmological dynamics, in the radiation-dominated universe, when T = 0, no contributions seem to arise from such theories. Apparently, f (R, T ) contributions to a radiation-dominated universe may arise only from the f (R, T φ ) approach, which is nothing but the f (R, T ) gravity in the case of a selfinteracting scalar field whose trace of the energy-momentum tensor is T φ . We intend, in this article, to show how f (R, T φ ) theories of gravity can contribute to the study of the primordial stages of the universe. Our results predict a graceful exit from an inflationary stage to a radiation-dominated era. They also predict a late-time cosmic acceleration after a matter-dominated phase, enabling the f (R, T φ ) theories to describe, in a self-consistent way, all the different stages of the dynamics of the universe.

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Section: Another Further Work May Rise From An Alternative Form For Fmentioning

confidence: 99%

A complete cosmological scenario from $$f(R,T^{\phi })$$ f ( R , T ϕ )

Moraes¹,

Santos²

2016

Eur. Phys. J. C

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“…Banerjee and Santos [30] had obtained the solutions of Bianchi type II, VIII and IX under this condition. Recently, many authors have assumed this condition in order to obtain solutions of the eld equations for di erent types cosmological models [31][32][33][34][35][36][37][38].…”

Section: Solutions Of the Eld Equationsmentioning

confidence: 99%

Kantowski-Sachs Cosmological model with quark and strange quark matter in f(R) theory of gravity

2014

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Abstract:In this paper we have studied the KantowskiSachs cosmological model with the quark and strange quark matter in the f (R) theory of gravity. The general solutions of the eld equations are obtained by assuming the physical condition shear scalar σ is proportional to scalar expansion θ, which leads to the relation B = A n between metric coe cients B and A. The physical and geometrical aspects of the model are also discussed.

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“…[44]. Recently, many authors have assumed this condition in order to obtain solutions of the field equations for different types cosmological models [55][56][57][58][59][60][61]. From equations (2.6), (2.7) and (3.1), we obtain…”

Section: Solutions Of the Field Equationsmentioning

confidence: 99%

Bianchi type-II universe with linear equation of state

Adhav¹,

Pawade²,

Bansod³

2014

Open Physics

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Abstract:We have studied anisotropic and homogeneous Bianchi type-II cosmological model with linear equation of state (EoS) = αρ − β, where α and β are constants, in General Relativity. In order to obtain the solutions of the field equations we have assumed the geometrical restriction that expansion scalar θ is proportional to shear scalar σ . The geometrical and physical aspects of the model are also studied.PACS (2008)

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Anisotropic universe models in Brans–Dicke theory

Cited by 72 publications

References 43 publications

A complete cosmological scenario from $$f(R,T^{\phi })$$ f ( R , T ϕ )

A complete cosmological scenario from $$f(R,T^{\phi })$$ f ( R , T ϕ )

Kantowski-Sachs Cosmological model with quark and strange quark matter in f(R) theory of gravity

Bianchi type-II universe with linear equation of state

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