Constraining Newtonian stellar configurations in f(R) theories of gravity

Details Constraining Newtonian stellar configurations in f(R) theories of gravity Constraining Newtonian stellar configurations in f(R) theories of gravity

2007-09-21

arxiv.org/abs/0709.3422v2

Phys.Lett.B659:843-846,2008

Astronomy and Astrophysics

Astrophysics

4 pages; v2: added references, modified abstract and introduction, conclusions unchanged

Scientific paper

10.1016/j.physletb.2007.12.022

We consider general metric $f(R)$ theories of gravity by solving the field equations in the presence of a spherical static mass distribution by analytical perturbative means. Expanding the field equations systematically in $\cO(G)$, we solve the resulting set of equations and show that $f(R)$ theories which attempt to solve the dark energy problem very generally lead to $\gamma_{PPN}=1/2$ in the solar system. This excludes a large class of theories as possible explanations of dark energy. We also present the first order correction to $\gamma_{PPN}$ and show that it cannot have a significant effect.

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