English

Magnetized dark energy and the late time acceleration

General Physics 2013-01-29 v3

Abstract

In the present work we have searched the existence of the late time acceleration of the Universe. The matter source that is responsible for the late time acceleration of the Universe consists of cosmic fluid with the equation of state parameter ω=pρ\omega =\frac{p}{\rho} and uniform magnetic field of energy density ρB\rho_{B}. The study is done here under the framework of spatially homogeneous and anisotropic locally rotationally symmetric (LRS) Bianchi-I cosmological model in the presence of magnetized dark energy. To get the deterministic model of the Universe, we assume that the shear scalar (σ)(\sigma) in the model is proportional to expansion scalar (θ)(\theta). This condition leads to A=BnA=B^{n}, where AA and BB are metric functions and nn is a positive constant giving the proportionality condition between shear and expansion scalar. It has been found that the isotropic distribution of magnetized dark energy leads to the present accelerated expansion of the Universe and the derived model is in good agreement with the recent astrophysical observations. The physical behavior of the Universe has been discussed in details.

Keywords

Cite

@article{arxiv.1204.0223,
  title  = {Magnetized dark energy and the late time acceleration},
  author = {Anil Kumar Yadav and Farook Rahaman and Saibal Ray and G. K. Goswami},
  journal= {arXiv preprint arXiv:1204.0223},
  year   = {2013}
}

Comments

13 pages, 5 figures, Considerable rearrangement in the textual context, Accepted in Euro. Phys. J. P

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