A no-go theorem for polytropic spheres in Palatini f(R) gravity
General Relativity and Quantum Cosmology
2008-09-29 v2 Astrophysics
High Energy Physics - Theory
Abstract
Non-vacuum static spherically-symmetric solutions in Palatini f(R) gravity are examined. It is shown that for generic choices of f(R), there are commonly-used equations of state for which no satisfactory physical solution of the field equations can be found within this framework, apart from in the special case of General Relativity, casting doubt on whether Palatini f(R) gravity can be considered as giving viable alternatives to General Relativity.
Keywords
Cite
@article{arxiv.gr-qc/0703132,
title = {A no-go theorem for polytropic spheres in Palatini f(R) gravity},
author = {Enrico Barausse and Thomas P. Sotiriou and John C. Miller},
journal= {arXiv preprint arXiv:gr-qc/0703132},
year = {2008}
}
Comments
7 pages, 1 figure. Version accepted for publication as a Fast Track Communication in CQG