English

Transitioning Universe with hybrid scalar field in Bianchi I space-time

General Relativity and Quantum Cosmology 2020-11-19 v1

Abstract

In this paper we investigate a Bianchi type I transitioning Universe in Brans-Dicke theory. To get an explicit solution of the field equations, we assume scalar field as ϕ=ϕ0[tαexp(βt)]δ\phi = \phi_{0}\left[t^{\alpha}exp(\beta t)\right]^{\delta} with ϕ0\phi_{0}, α\alpha, β\beta and δ\delta as constants. The values of α\alpha and β\beta are obtained by probing the proposed model with recent observational Hubble data (OHD) points. The interacting and non-interacting scenarios between dark matter and dark energy of the derived Universe within the framework of Brans-Dicke gravity are investigated. The om(z)om(z) analysis of the Universe in derived model shows that the Universe is filled with dynamical dark energy with its equation of state parameter ωde>1\omega_{de} > -1. Hence the Universe behaves like a quintessence model at present epoch. Some physical properties of the Universe are also discussed.

Keywords

Cite

@article{arxiv.2011.09266,
  title  = {Transitioning Universe with hybrid scalar field in Bianchi I space-time},
  author = {Anil Kumar Yadav and A. M. Alshehri and Nafis Ahmad and G. K. Goswami and Mukesh Kumar},
  journal= {arXiv preprint arXiv:2011.09266},
  year   = {2020}
}

Comments

11 pages, 9 figures