Regular Article - Theoretical Physics
Noether symmetries of Einstein-aether scalar field cosmology
Department of Physics, Faculty of Science, Akdeniz University, 07058, Antalya, Turkey
2 Department of Theoretical Physics and Astrophysics, Faculty of Physics, University of Tabriz, 51666-16471, Tabriz, Iran
Accepted: 19 October 2020
Published online: 4 November 2020
In this paper, we explore an Einstein-aether cosmological model by adding the scalar field in which it has an interaction with the aether field. For the cosmological implications of the model, we consider that the universe can be described by the spatially flat FRW metric together with the matter dominated universe. Applying Noether symmetry approach to the point-like Lagrangian we determine the explicit forms of unknown functions i.e. the potential and coupling function. We solve the analytical cosmological solutions of the field equations admitting the Noether symmetry, basically divided into two parts. Our results show that the obtained solutions lead to an accelerated expansion of the universe. We also discuss the tensor perturbations within the framework of this model in order to get information about the mass of gravitational waves.
© The Author(s) 2020
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