TY - GEN

T1 - Gravitational instability in non-stationary external fields

AU - Arbuzova, Elena

PY - 2017/1/1

Y1 - 2017/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85048512314&partnerID=8YFLogxK

U2 - 10.1142/9789813224568_0049

DO - 10.1142/9789813224568_0049

M3 - Conference contribution

AN - SCOPUS:85048512314

SN - 9789813224551

T3 - Proceedings of the 17th Lomonosov Conference on Elementary Particle Physics - Particle Physics at the Year of Light, 2015

SP - 316

EP - 319

BT - PARTICLE PHYSICS at the Year of Light

PB - World Scientific Publishing Co. Pte Ltd

T2 - 17th Lomonosov Conference on Elementary Particle Physics, 2015

Y2 - 19 August 2015 through 25 August 2015

ER -