Hypersurface-homogeneous modified holographic Ricci dark energy cosmological model by hybrid expansion law in Saez–Ballester theory of gravitation

Shaikh, A. Y.; Shaikh, Amjad; Wankhade, K. S.

doi:10.1007/s12036-019-9591-4

“…At the bouncing epoch, the jerk parameter has a singular value because of the vanishing nature of the Hubble rate at bounce. At a large cosmic time away from the bounce, the jerk parameter decreases to small values close to one, which was outlined in our earlier work [58,59].…”

Section: Stability Factorsupporting

confidence: 62%

Bouncing scenario of general relativistic hydrodynamics in extended gravity

Shaikh¹,

Mishra²

2021

Commun. Theor. Phys.

View full text Add to dashboard Cite

In this paper, we have framed bouncing cosmological model of the Universe in the presence of general relativistic hydrodynamics in an extended theory of gravity. The metric assumed here is the flat Friedmann–Robertson–Walker space–time and the stress energy tensor is of perfect fluid. Since general relativity (GR) has certain issues with late time cosmic speed up phenomena, here we have introduced an additional matter geometry coupling that described the extended gravity to GR. The dynamical parameters are derived and analyzed. The dynamical behavior of the equation of state parameter has been analyzed. We have observed that the bouncing behavior is mostly controlled by the coupling parameter.

show abstract

“…We also believe that this gravity theory provides an adequate description of the weak fields and a solution of missing matter cosmological problem in non-flat cosmology. Various authors including our own peer research group have constructed models of the universe in Sáez-Ballester theory and published fruitful results [11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Untitled

2023

Bulg.J.Phys.

0

View full text Add to dashboard Cite

The present communication deals with the tilted Bianchi type-VI0 bulk viscous string cosmological models in Sáez-Ballester theory of gravitation.To obtain an exact solution of the field equations, we consider three feasible physical relations, viz., expansion scalar θ as proportional to one of the components of the shear scalar σ, bilinear varying deceleration parameter (BVDP) and bulk viscosity coefficient ξ as a simple power function of the energy density ρ. We also discuss the behaviour of physical and geometrical parameters of the obtained models. For the stability of the solution, the nature of energy conditions is explored graphically. The findings of the models are in good agreement with the observational data.

show abstract

“…We also believe that this gravity theory provides an adequate description of the weak fields and a solution of missing matter cosmological problem in non-flat cosmology. Various authors including our own peer research group have constructed models of the universe in Sáez-Ballester theory and published fruitful results [11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Certain Investigations on Bulk Viscous String Models of the Universe with BVDP

2023

Bulg.J.Phys.

1

0

View full text Add to dashboard Cite

The present communication deals with the tilted Bianchi type-VI0 bulk viscous string cosmological models in Sáez-Ballester theory of gravitation.To obtain an exact solution of the field equations, we consider three feasible physical relations, viz., expansion scalar θ as proportional to one of the components of the shear scalar σ, bilinear varying deceleration parameter (BVDP) and bulk viscosity coefficient ξ as a simple power function of the energy density ρ. We also discuss the behaviour of physical and geometrical parameters of the obtained models. For the stability of the solution, the nature of energy conditions is explored graphically. The findings of the models are in good agreement with the observational data.

show abstract

Hypersurface-homogeneous modified holographic Ricci dark energy cosmological model by hybrid expansion law in Saez–Ballester theory of gravitation

Cited by 18 publications

References 90 publications

Bouncing scenario of general relativistic hydrodynamics in extended gravity

Bouncing scenario of general relativistic hydrodynamics in extended gravity

Untitled

Certain Investigations on Bulk Viscous String Models of the Universe with BVDP

Contact Info

Product

Resources

About