Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999dps....31.4409t&link_type=abstract
American Astronomical Society, DPS meeting #31, #44.09
Astronomy and Astrophysics
Astronomy
Scientific paper
Saturn's E ring consists mostly of micron sized particles ejected from the surface of the moon Enceladus. Their long-term evolution is mainly determined by Saturn's gravity, electromagnetic forces and radiation pressure. We studied the influence of additional forces, e.g., plasma drag as well as the influence of the initial motion of the particles on their long--term evolution. The most of the observed E ring features can be explained by the inclusion of these two effects in the existing models for the dynamics of the ring particles. The initial motion of particles ejected from Enceladus causes a vertical ring extension in good accordance with the observed ring height profile. Plasma drag and an ejection of dust preferentially in the direction of Enceladus' motion lead to a radially asymmetric density profile of the ring, also in qualitative agreement with the observations. This work has been supported by Deutsches Zentrum fur Luft-- und Raumfahrt (DLR).
Krivov Alexander
Schmidt Jonas
Spahn Frank
Thiessenhusen Kai-Uwe
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