In the present paper we consider f (R) gravity theories in the metric approach and we derive the equations of motion, focusing also on the boundary conditions. In such a way we apply the general equations to a first order perturbation expansion of the Lagrangian. We present a model able to fit supernovae data without introducing dark energy.

Cosmic Acceleration and f (R) Theory: Perturbed Solution in a Matter FLRW Model

Tedesco L.
2016

Abstract

In the present paper we consider f (R) gravity theories in the metric approach and we derive the equations of motion, focusing also on the boundary conditions. In such a way we apply the general equations to a first order perturbation expansion of the Lagrangian. We present a model able to fit supernovae data without introducing dark energy.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11586/261664
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