22-30 July 2021
North-West University
Africa/Johannesburg timezone
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Bianchi Type V Model In R^n Gravity: A Dynamical System Approach

27 Jul 2021, 11:45
Potchefstroom Campus (North-West University)

Potchefstroom Campus

North-West University

Oral Presentation Track G - Theoretical and Computational Physics Theoretical and Computational Physics


Thato Tsabone (North-West University)


The accelerated expansion of the universe and the rotational dynamics of galaxies have become part of the mysteries of the physical world and have had theorists working tirelessy for the past years. There is no consensus on what is causing these observable effects: whether it is the the unknown dark energy and dark matter or it is the breaking down of our currently accepted theory of gravity, General Relativity, at larger scales. In this work we study the dynamics of a cosmological model described by the Bianchi Type V spacetime in f(R) gravity using the dynamical system analysis. We derive the field equations for a general Bianchi model in the context of f(R) gravity using the tetrad formalism and then specialize in the Type V model. Qualitative description and exact solutions are given for f(R) = R (General Relativity) and for f(R) = R^n. We find no accelerating solutions in the case of General Relativity with an exception when darkn energy is considered where we find one accelerating solution. In the case of Rn-gravity we find 2 possible accelerating solutions depending on the value of n.

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Primary author

Thato Tsabone (North-West University)

Presentation Materials

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