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Accelerating Bianchi type dark energy cosmological model with cosmic string in \(f(T)\) gravity

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Abstract

In this paper, we have investigated some features of anisotropic accelerating Bianchi type-I cosmological model in the presence of two non-interacting fluids, i.e. one usual string and other dark energy fluid towards the gravitational field equations for the linear form of \(f(T)\) gravity, where \(T\) be the torsion. To achieve a physically realistic solution of the field equations, we have considered an exact matter dominated volumetric power law expansion. Aspects of the derived model are discussed with the help of the solution and make the model at late times turn out to be a flat Universe. It is also observed that the model is initially singular and stable, while for the whole expansion it is unstable. At an initial expansion \(0.01 \le t \le 0.05\) when the Universe start to expand to infinite expansion \(t > 1.73\) (break away from for small interval of cosmic time \(0.06 \le t \le 1.73\)), there is a matter dominated era while for \(0.06 \le t \le 1.73\) it approaches the quintessence region. Also, the string exists in the early universe which is in agreement with constraints of CMBR data but with the expansion the string phase of the Universe disappears, i.e. we have an anisotropic fluid of particles.

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Acknowledgements

We are very much obliged to the honorable referee and the editor for the informative suggestions that have considerably upgraded our work in terms of research quality.

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Correspondence to S. H. Shekh.

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Shekh, S.H., Chirde, V.R. Accelerating Bianchi type dark energy cosmological model with cosmic string in \(f(T)\) gravity. Astrophys Space Sci 365, 60 (2020). https://doi.org/10.1007/s10509-020-03772-y

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  • DOI: https://doi.org/10.1007/s10509-020-03772-y

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