Regular Article - Theoretical Physics
Exact cosmological solutions for MOG
Department of Physics, Ferdowsi University of Mashhad, P.O. Box 1436, Mashhad, Iran
* e-mail: firstname.lastname@example.org
Accepted: 17 August 2015
Published online: 3 September 2015
We find some new exact cosmological solutions for the covariant scalar–tensor–vector gravity theory, the so-called modified gravity (MOG). The exact solution of the vacuum field equations has been derived. Also, for non-vacuum cases we have found some exact solutions with the aid of the Noether symmetry approach. More specifically, the symmetry vector and also the Noether conserved quantity associated to the point-like Lagrangian of the theory have been found. Also we find the exact form of the generic vector field potential of this theory by considering the behavior of the relevant point-like Lagrangian under the infinitesimal generator of the Noether symmetry. Finally, we discuss the cosmological implications of the solutions.
© SIF and Springer-Verlag Berlin Heidelberg, 2015