Stability of polar rings around Neptune
Abstract
Perturbations from Neptune's highly inclined satellite Triton can maintain stationary rings passing nearly over Neptune's poles. These hypothetical polar rings are nearly perpendicular to Triton's orbit as well, and lie within several degrees of the plane of Voyager II's trajectory through the Neptunian system. Polar rings can coexist with equatorial rings at different radii. This paper offers an analytic proof that polar rings of Neptune can be stable despite dissipation of energy by collisions between particles. It also includes a computer simulation of a Neptunian ring settling into a polar orientation.
 Publication:

Icarus
 Pub Date:
 September 1989
 DOI:
 10.1016/00191035(89)901309
 Bibcode:
 1989Icar...81..132D
 Keywords:

 Neptune (Planet);
 Neptune Satellites;
 Orbit Perturbation;
 Planetary Rings;
 Energy Dissipation;
 Polar Regions;
 Triton;
 Voyager 2 Spacecraft;
 NEPTUNE;
 RINGS;
 POLAR REGIONS;
 STABILITY;
 DIAGRAMS;
 CALCULATIONS;
 RADIUS;
 SATELLITE EFFECTS;
 PERTURBATIONS;
 THEORETICAL STUDIES;
 SIMULATIONS;
 ORBITS;
 COLLISIONS;
 EQUILIBRIUM;
 MODELS;
 Lunar and Planetary Exploration; Neptune