Robust approach to f(R) gravity
General Relativity and Quantum Cosmology
2011-02-15 v3 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
We consider metric f(R) theories of gravity without mapping them to their scalar-tensor counterpart, but using the Ricci scalar itself as an "extra" degree of freedom. This approach avoids then the introduction of a scalar-field potential that might be ill defined (not single valued). In order to explicitly show the usefulness of this method, we focus on static and spherically symmetric spacetimes and deal with the recent controversy about the existence of extended relativistic objects in certain class of f(R) models.
Keywords
Cite
@article{arxiv.1006.5747,
title = {Robust approach to f(R) gravity},
author = {Luisa G. Jaime and Leonardo Patino and Marcelo Salgado},
journal= {arXiv preprint arXiv:1006.5747},
year = {2011}
}
Comments
5 pages; 2 figures (4 panels); minor corrections to match the published version; panel added