Relativistic stars in f ( R ) gravity, and absence thereof

By Tsutomu Kobayashi, K. Maeda. 2008

144 citations recorded by the source corpus.

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.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Oceanography

View Paper: https://www.semanticscholar.org/paper/015875dedf8b5956a3b274eb7ea5b63ac501aaea

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Citations in the corpus

Modified Gravity and Cosmology (2011, background): “The existence of this type of instability was rediscovered in [706], for relativistic stars.”
Approaches to understanding cosmic acceleration (2009, unknown): “Finally, it was recently shown [169, 170] that even models of f (R) that satisfy all of the above conditions might still face problems in the strong gravity regime.”
Curing singularities in cosmological evolution of F(R) gravity (2009, background): “1) might become important should the trace T of the matter energy-momentum tensor change sign and become positive inside neutron stars, as happens in idealized ρ = const solutions considered in [57, 59].”