Solar system constraints on f(G) gravity models

Details Solar system constraints on f(G) gravity models Solar system constraints on f(G) gravity models

2009-07-10

arxiv.org/abs/0907.1830v1

Phys.Rev.D80:063516,2009

Physics

High Energy Physics

High Energy Physics - Theory

19 pages, uses ReVTeX

Scientific paper

10.1103/PhysRevD.80.063516

We discuss solar system constraints on f(G) gravity models, where f is a function of the Gauss-Bonnet term G. We focus on cosmologically viable f(G) models that can be responsible for late-time cosmic acceleration. These models generally give rise to corrections of the form epsilon*(r/rs)^p to the vacuum Schwarzschild solution, where epsilon = H^2 rs^2 << 1, rs is the Schwarzschild radius of Sun, and H is the Hubble parameter today. We generally estimate the strength of modifications to General Relativity in order to confront models with a number of experiments such as the deflection of light and the perihelion shift. We show that cosmologically viable f(G) models can be consistent with solar system constraints for a wide range of model parameters.

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