Relativistic stars in f(R) gravity, and absence thereof
Astrophysics
2009-02-20 v2 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
Several f(R) modified gravity models have been proposed which realize the correct cosmological evolution and satisfy solar system and laboratory tests. Although nonrelativistic stellar configurations can be constructed, we argue that relativistic stars cannot be present in such f(R) theories. This problem appears due to the dynamics of the effective scalar degree of freedom in the strong gravity regime. Our claim thus raises doubts on the viability of f(R) models.
Keywords
Cite
@article{arxiv.0807.2503,
title = {Relativistic stars in f(R) gravity, and absence thereof},
author = {Tsutomu Kobayashi and Kei-ichi Maeda},
journal= {arXiv preprint arXiv:0807.2503},
year = {2009}
}
Comments
9 pages, 7 figures, v2: references added, minor corrections, version accepted for publication in PRD