Gravitational instability in non-stationary external fields

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Abstract

Gravitational instability in classical Jeans theory, General Relativity, and modified gravity is considered. It is shown that density perturbations in the background with an increasing density rise faster than in the case of time independent background. Evolution of density and metric perturbations in the background of high frequency oscillations of curvature in F (R) gravity is studied. In addition to the usual Jeans-like instability new effects of amplification of perturbations, associated with parametric resonance and antifriction phenomena, are found.

Original languageEnglish
Title of host publicationPARTICLE PHYSICS at the Year of Light
PublisherWorld Scientific Publishing Co. Pte Ltd
Pages316-319
Number of pages4
Edition211889
ISBN (Print)9789813224551
DOIs
Publication statusPublished - 1 Jan 2017
Event17th Lomonosov Conference on Elementary Particle Physics, 2015 - Moscow, Russian Federation
Duration: 19 Aug 201525 Aug 2015

Conference

Conference17th Lomonosov Conference on Elementary Particle Physics, 2015
CountryRussian Federation
CityMoscow
Period19.08.201525.08.2015

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