79 citations · 183 across the 3 of their papers we have counts for
7 papers · 1 filter
Power-law cosmic expansion in f(R) gravity models
Naureen Goheer, Julien Larena, Peter K. S. Dunsby
We show that within the class of f(R) gravity theories, FLRW power-law perfect fluid solutions only exist for R^n gravity. This significantly restricts the set of exact cosmologica…
On the co-existence of matter dominated and accelerating solutions in f(G)-gravity
Naureen Goheer, Rituparno Goswami, Peter K. S. Dunsby +1
Working within the theory of modified Gauss-Bonnet gravity, we show that FLRW--like power--law solutions only exist for a very special class of f(G)theories. Furthermore, we point…
Dynamics of f(R)-cosmologies containing Einstein static models
Naureen Goheer, Rituparno Goswami, Peter K. S. Dunsby
We study the dynamics of homogeneous isotropic FRW cosmologies with positive spatial curvature in -gravity, paying special attention to the existence of Einstein static model…
The Existence of Einstein Static Universes and their Stability in Fourth order Theories of Gravity
Rituparno Goswami, Naureen Goheer, Peter K. S. Dunsby
We investigate whether or not an Einstein Static universe is a solution to the cosmological equations in gravity. It is found that only one class of theories admits a…
Dynamical systems analysis of anisotropic cosmologies in -gravity
Naureen Goheer, Jannie A. Leach, Peter K. S. Dunsby
In this paper we study the dynamics of {\it orthogonal spatially homogeneous} Bianchi cosmologies in -gravity. We construct a compact state space by dividing the state space i…
Compactifying the state space for alternative theories of gravity
Naureen Goheer, Jannie A. Leach, Peter K. S. Dunsby
In this paper we address important issues surrounding the choice of variables when performing a dynamical systems analysis of alternative theories of gravity. We discuss the advant…