Exact Kantowski-Sachs Anisotropic Dark Energy Cosmological Models in Brans Dicke Theory of Gravitation

Pawar, D. D.; Solanke, Y. S.

doi:10.1007/s10773-014-2101-1

Cited by 18 publications

(11 citation statements)

References 22 publications

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“…Such a parameterization has been frequently used in the following works:(Caldwell and Kamionkowski 2003;Akarsu and Tekin 2012;Bakry and Shafeek 2019;Sahoo and Sivakumar 2015;Sahoo et al 2018;Mishra et al 2012Mishra et al , 2013aMishra et al , 2013bWanas and Hassan 2014). Also, many researchers have studied cosmological models in the gravitational theory; for example, see Refs(Pawar and Solanke 2014;Dagwal and Pawar 2018;Xiao and Wang 2020;…”

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confidence: 99%

Torsion and shear effect on a Big Rip model in a gravitational field

Bakry

Eid

Khader

2021

Astrophys Space Sci

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In this paper, we investigate the effects of torsion and shears within the framework of the gravitational field with torsion in early and late cosmology. General relativity and torsion field equations are constructed using absolute parallel geometry. The Big Rip model of the Universe has been presented using a special class of Riemann-Cartan geometry and the law of variation of Hubble's parameter. The model does not depend on the curvature constant. The positive condition of the energy density of the matter is satisfied in this model. This cosmological model shows that the torsion and shear effect is strong at the beginning of the Big Bang and at the end of the universe. Through the examination of precise cases of the parameters and initial conditions, we can show that for suitable ranges of the parameters, the dynamic torsion scalar model can exhibit features similar to those of the currently observed accelerating universe. The relationship between the torsion and shear scalars is investigated, and their impact on the accelerating universe is addressed apart from the idea of dark energy.

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confidence: 99%

Torsion and shear effect on a Big Rip model in a gravitational field

Bakry

Eid

Khader

2021

Astrophys Space Sci

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“…The average scale factor of the universe for a given redshift is related to the present scale factor 0 by the relation 1 + = 0 / . Equations (25) and (35) give…”

Section: Power Expansion Modelmentioning

confidence: 99%

“…The quintessence, phantom field, Caldwell [24], Ratra and Peebles [29], quintom Elizalde et al [30], Chaplygin gas models Kamenshchik et al [31], tachyon field Padmanabhan [32], holographic, Setare [33] are some of the examples of dark energy models. Recently, Pawar et al [34,35] studied Kantowski-Sachs cosmological models with constant EoS parameter in Barber's second self-creation theory and dark energy models in Brans-Dicke theory of gravitation. An anisotropic cosmological model plays an important role in the large scale behavior of the universe.…”

Section: Introductionmentioning

confidence: 99%

Magnetized Anisotropic Dark Energy Models in Barber’s Second Self-Creation Theory

Pawar

Solanke²

2014

Advances in High Energy Physics

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The present paper deals with Bianchi type IX cosmological model with magnetized anisotropic dark energy by using Barber’s self-creation theory. The energy momentum tensor consists of anisotropic fluid with EoS parameterωand a uniform magnetic field of energy densityρB. In order to obtain the exact solution we have assumed that dark energy components and the components of magnetic field interact minimally and obey the law of conservation of energy momentum tensors. We have also used the special law of variation for the mean generalized Hubble parameter and power law relation between scalar field and scale factor. Some physical and kinematical properties of the models have been discussed.

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“…The present work is studied in the framework the f (R, T ) theory of gravity proposed by Hrko et al (2011) in which R and T are the Ricci scalar and trace of the stress energy tensor, respectively, which is different from the f (R, T ) theory used by Myrzakulov [32] in which R is curvature scalar and T is torsion scalar. In the present paper we investigated the LRS Bianchi type I cosmological model used by Abdussattar et al [20] by assuming the spatial law of variation of Hubble's parameter proposed by Berman [33] and Pawar et al [34,35]. We obtained some physical parameters and discussed their physical behaviors.…”

Section: Introductionmentioning

confidence: 97%

Cosmological models filled with a perfect fluid source in the f(R,T) theory of gravity

Pawar¹,

Solanke²

2015

Turk J Phys

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Abstract:We investigated the physical behavior of an LRS Bianchi type I cosmological model in the framework of the f (R, T ) theory of gravity in the presence of a perfect fluid, where R is the Ricci scalar and T is the trace of the stress energy tensor of the matter. In order to obtain a deterministic solution of the field equations we assumed the special law of variation of the Hubble parameter proposed by Berman that yields the constant deceleration parameter. Some physical properties of the models are discussed.

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Exact Kantowski-Sachs Anisotropic Dark Energy Cosmological Models in Brans Dicke Theory of Gravitation

Cited by 18 publications

References 22 publications

Torsion and shear effect on a Big Rip model in a gravitational field

Torsion and shear effect on a Big Rip model in a gravitational field

Magnetized Anisotropic Dark Energy Models in Barber’s Second Self-Creation Theory

Cosmological models filled with a perfect fluid source in the f(R,T) theory of gravity

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