Stirring N-body systems: universality of end states

TY - JOUR

T1 - Stirring N-body systems

T2 - universality of end states

AU - Barber, J.A.

AU - Zhao, H.

AU - Wu, X.

AU - Hansen, Steen Harle

PY - 2012/8/11

Y1 - 2012/8/11

N2 - We study the evolution of the phase space of collisionless N-body systems under repeated stirrings or perturbations. We find convergence towards a limited solution group, in accordance with Hansen, Juncher & Sparre, that is independent of the initial system and environmental conditions, paying particular attention to the assumed gravitational paradigm (Newtonian and Modified Newtonian Dynamics). We examine the effects of changes to the perturbation scheme and in doing so identify a large group of perturbations featuring radial orbit instability which always lead to convergence. The attractor is thus found to be a robust and reproducible effect under a variety of circumstances.

AB - We study the evolution of the phase space of collisionless N-body systems under repeated stirrings or perturbations. We find convergence towards a limited solution group, in accordance with Hansen, Juncher & Sparre, that is independent of the initial system and environmental conditions, paying particular attention to the assumed gravitational paradigm (Newtonian and Modified Newtonian Dynamics). We examine the effects of changes to the perturbation scheme and in doing so identify a large group of perturbations featuring radial orbit instability which always lead to convergence. The attractor is thus found to be a robust and reproducible effect under a variety of circumstances.

U2 - 10.1111/j.1365-2966.2012.21249.x

DO - 10.1111/j.1365-2966.2012.21249.x

M3 - Journal article

SN - 0035-8711

VL - 424

SP - 1737

EP - 1751

JO - Royal Astronomical Society. Monthly Notices

JF - Royal Astronomical Society. Monthly Notices

IS - 3

ER -