Gravitational instability in oscillating background

Abstract

Evolution of density and metric perturbations in the background of high frequency oscillations of curvature in F(R) gravity is considered. In addition to the usual Jeans-like instability new effects of amplification of perturbations, associated with parametric resonance and antifriction phenomena, are found.

21 pages, 14 figures

References in corpus (8)

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• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• Disappearing cosmological constant in f(R) gravity
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• Jeans Instability in Classical and Modified Gravity
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Cited by in corpus (2)

• Jeans Analysis of Bok globules in $f(R)$ gravity
• Cosmic ray production in modified gravity