Dynamical and Photometric Modeling of Azimuthal Brightness Asymmetry in Saturn's Rings

Details Dynamical and Photometric Modeling of Azimuthal Brightness Asymmetry in Saturn's Rings Dynamical and Photometric Modeling of Azimuthal Brightness Asymmetry in Saturn's Rings

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999dps....31.5505s&link_type=abstract

American Astronomical Society, DPS meeting #31, #55.05

Astronomy and Astrophysics

Astronomy

Scientific paper

Dynamical N-body simulations suggest the formation of trailing density enhancements in the outer portions of Saturn's rings, due local gravitational instabilities. These ``wakes'' have typical sizes in the range of 10 to 100 meters, with pitch angles about 20-25(o) with respect to tangential direction. The photometric implications of such wakes are studied via Monte Carlo method including multiple scattering. Comparison of simulations with the observed asymmetry in Saturn's A-ring yields good agreement for the variation of the brightness along the ring longitude. The radial dependency of the amplitude of asymmetry can be used to constrain the elasticity and internal density of ring particles. This study is supported by the Academy of Finland.

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