Local N-Body Simulations for the Distribution and Evolution of Particle Velocities in Planetary Rings

摘要: Distribution and evolution of particle velocities in planetary rings one- two-size components are investigated by a local N-body simulation with periodic boundary conditions, which includes collisions gravitational interactions between particles. Evolution rms eccentricities inclinations for system low optical depth is found to be well predicted the numerical results three-body orbit calculations. The Kolmogorov-Smirnov test performed examine velocity distribution, it that distribution orbital particles disk can approximated Rayleigh when restitution coefficient small enough (0.6) achieve an equilibrium state, whereas excess high-velocity more elastic cases dispersion increases monotonically. When larger becomes gravitationally unstable, however, effects collective wakes become important. Theoretical based on calculations fail predict this case, deviate from distribution.