Perturbed particle disks

Details Perturbed particle disks Perturbed particle disks

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icar...55..124b&link_type=abstract

Icarus (ISSN 0019-1035), vol. 55, July 1983, p. 124-132.

Computer Science

47

Particle Collisions, Planetology, Ring Structures, Angular Momentum, Boltzmann Transport Equation, Deformation, Ellipsoids, Kinematics, Momentum Transfer, Stress Tensors

Scientific paper

The velocity ellipsoid in a particle disk near an isolated satellite resonance is determined by solving the Boltzmann moment equations, and solutions are obtained that are stationary functions of the azimuthal angle in a coordinate frame which rotates with the pattern speed of the perturbation potential. The magnitude of the deformation rate tensor in a perturbed particle disk is bounded from above by an expression which includes the orbital angular velocity, the optical depth, and a dimensionless constant of order unity. It is also found that, in sufficiently perturbed regions, there are ranges of azimuthal angle over which the radial component of the angular momentum flux is negative. It is also possible for the angular momentum luminosity to be negative. These results are pertinent to the understanding of sharp edges and density wave decay in planetary rings.

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