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

Tsutomu Kobayashi; Kei Ichi Maeda

doi:10.1103/PhysRevD.78.064019

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

Tsutomu Kobayashi^*, Kei Ichi Maeda

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

146 Citations (Scopus)

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.

Original language	English
Article number	064019
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	78
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevD.78.064019
Publication status	Published - 2008 Sept 8
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.78.064019

Cite this

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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.",

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

Abstract

ASJC Scopus subject areas

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