DPS 2001 meeting, November 2001
Session 25. Solar System Origins II
Oral, Chairs: M. Drake, H. Levison, Wednesday, November 28, 2001, 5:00-6:30pm, Regency GH

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[25.09] Nodal Waves in Particle Disks.

Wm. R. Ward (Southwest Research Institute)

The physics of bending waves launched in a particle disk from a secular resonance by an inclined perturber is described. These so-called nodal waves are of long wavelength, carry negative angular momentum but little energy, and have a negative pattern speed. When originating from a resonance exterior (interior) to the perturber, they propagate outward (inward) as a leading (trailing) spiral wave. The reaction torque on the perturber tends to damp its orbital inclination, but causes little change in its semi-major axis. Some cosmogonical implications of this type of disk-satellite interaction for particle populations, such as the primordial asteroid and Kuiper belts, will be discussed.


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