Magnetized dark energy and the late time acceleration

Yadav, Anil Kumar; Rahaman, Farook; Ray, Saibal; Goswami, G. K.

doi:10.1140/epjp/i2012-12127-6

Cited by 34 publications

(14 citation statements)

References 66 publications

(67 reference statements)

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“…It is interesting to note that our investigations resembles to the result obtained by Yadav et.al. [15]. The analysis of the models reveals that the present-day universe is dominated by Dark Energy, which can successfully describe the accelerating nature of the universe consistent with the observations.…”

Section: Resultssupporting

confidence: 64%

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2017

PAIJ

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In this paper we investigated Homogenous -Hyper surface magnetized dark energy models with constant deceleration parameter. The energy-momentum tensor consists of anisotropic fluid with anisotropic EoS p ωρ = and a uniform magnetic field of energy density B ρ . We have obtained exact solutions to the field equations using the condition that scalar expansion is proportional to the shear scalar. The physical behaviors of the models are discussed with and without magnetic field. We conclude that universe model as well as anisotropic fluid does not approach isotropy through the evolution of the universe. The physical aspects of the dark energy models are also discussed. Keywords:

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Section: Resultssupporting

confidence: 64%

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2017

PAIJ

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“…Finally, it should be emphasized that the spinor field Lagrangian (2.1) can be used to simulate a time varying EoS parameter and DP as well. Models with time varying EoS parameter and DP have been extensively studied in recent time [31][32][33][34]. We plan to study all these possibilities within the scope of different Bianchi models in our forthcoming papers.…”

Section: Discussionmentioning

confidence: 99%

Nonlinear Spinor Fields in Bianchi Type-I Spacetime Reexamined

Saha

2013

Int J Theor Phys

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The specific behavior of spinor field in curve space-time with the exception of FRW model almost always gives rise to non-trivial non-diagonal components of the energy-momentum tensor. This non-triviality of non-diagonal components of the energy-momentum tensor imposes some severe restrictions either on the spinor field or on the metric functions. In this paper within the scope of an anisotropic Bianchi type-I Universe we study the role of spinor field in the evolution of the Universe. It is found that there exist two possibilities. In one scenario the initially anisotropic Universe evolves into an isotropic one asymptotically, but in this case the spinor field itself undergoes some severe restrictions. In the second scenario the isotropization takes places almost at the beginning of the process.

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“…This parameter characterizes different phases of the universe such as cosmological constant era for which ω is always equal to -1. If DE have not shown as Λ then the next phases are the phantom phase in which ω < −1 [10], quintessence for ω > −1 and quintom (that can cross the phantom divide line) [11]. Equation of state parameter for DE varies along red-shift parameter (z).…”

Section: Introductionmentioning

confidence: 99%

Cosmological evolution via interacting/non-interacting holographic dark energy model for curved FLRW space–time in Rastall gravity

Saleem

Shahnila

2021

Physics of the Dark Universe

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In this work, we explore the phenomenon of cosmic evolution using curved FLRW space-time bounded by apparent horizon with a specific holographic cut-off. To this end, we use the framework of Rastall gravity (RG) and universe is assumed to be consists of interacting/ non-interacting dark energy (DE) and dark matter (DM). In both scenarios, we evaluate exact solutions of the dynamical equations and constraint the holographic parameter c 2 (z) assuming a slowly varying function of red-shift during non-interacting model. For interacting model, we consider c 2 as a constant function of red-shift. Moreover, we analyze nature of the obtained results via deceleration parameter (q), statefinder pair (j, s) and Om(z)-diagnostic by constraining the involved model parameters using latest observational data. The graphical analysis showed that interacting model is very close to Λ cold DM (ΛCDM) model as compared to non-interacting case. We conclude that this holographic proposal is enough to describe the cosmic evolution at an accelerating rate.

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Magnetized dark energy and the late time acceleration

Cited by 34 publications

References 66 publications

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Nonlinear Spinor Fields in Bianchi Type-I Spacetime Reexamined

Cosmological evolution via interacting/non-interacting holographic dark energy model for curved FLRW space–time in Rastall gravity

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