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

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arxiv 0807.2503 v2 pith:P76JGQIF submitted 2008-07-16 astro-ph gr-qchep-th

Tsutomu Kobayashi , Kei-ichi Maeda This is my paper · ORCID
classification astro-phgr-qchep-th
keywords gravitymodelsrelativisticstarsabsencealthoughappearsargue
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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.

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Cited by 1 Pith paper

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  1. Radial oscillations of neutron stars in Starobinsky gravity and its Gauss-Bonnet extension

    gr-qc 2025-07 conditional novelty 6.0 of 10

    Radial oscillation frequencies of neutron stars are computed in Starobinsky and Gauss-Bonnet extended gravity, revealing a dynamical exterior and a low-density plateau in the fundamental mode.

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