Non-Linear Dispersion of Spiral Density Waves in Saturn's Rings

Details Non-Linear Dispersion of Spiral Density Waves in Saturn's Rings Non-Linear Dispersion of Spiral Density Waves in Saturn's Rings

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..563h&link_type=abstract

Lunar and Planetary Science, volume 27, page 563

Other

Density: Surface Mass, Dispersion, Rings, Saturn: Rings, Waves: Density

Scientific paper

We have analyzed the dispersion behavior of a number of spiral density waves in Saturn's A ring using the non-linear dispersion relation. We demonstrate that the dispersion behavior of the Mimas 8:5 and Prometheus 7:6 density waves is linear. On the other hand, the Mimas 5:3 density wave in Saturn's A ring disperses non-linearly over the extent of the wave and displays an unexpected difference in surface mass density between the Voyager radio science (RSS) and Voyager photopolarimeter (PPS) occultation data sets. The RSS surface mass densities were larger than the PPS values. This inconsistency may be indicative of different processes affecting the large (RSS) and small (PPS) particle populations. The dispersion behavior of these waves provides an important tool for probing the physical characteristics of the rings and estimating the ring age (which is currently thought to be much younger than the age of the solar system).

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