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 -