Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icar...44..326g&link_type=abstract
(IAU, American Astronomical Society, COSPAR, University of Hawaii, and NASA, Colloquium on the Satellites of Jupiter, 5th, Kailu
Astronomy and Astrophysics
Astronomy
33
Ejecta, Jupiter Rings, Planetary Evolution, Ring Structures, Halos, Jupiter Atmosphere, Micrometeoroids, Optical Properties, Particle Size Distribution
Scientific paper
Assuming that the micron-sized particles making up the bright Jovian ring are fragments of erosive collisions between micrometeoroid projectiles and large parent bodies, a physical model of the ring is calculated. This leads to a well-defined size distribution for the ejecta, whose optical properties can be compared with observation. The (most likely silicate) ejecta material maximum diameter is estimated to be 0.1 micron, and most likely the result of Io volcanic activity. The impact model's determination of ejecta size distribution in turn determines the structure of the ring, with the largest ejecta forming the bright ring, medium-sized ejecta forming a disk that extends to the Jovian atmosphere, and small ejecta forming a faint halo whose structure is dominated by electromagnetic forces.
Gruen Eberhard
Johnson Torrence V.
Morfill Gregor
Schwehm Gerhard
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