Estimating the Effectiveness of Cosmic Recycling in the History of Planetary Rings and Ring Moons

Details Estimating the Effectiveness of Cosmic Recycling in the History of Planetary Rings and Ring Moons Estimating the Effectiveness of Cosmic Recycling in the History of Planetary Rings and Ring Moons

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufm.p51f..08e&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #P51F-08

Physics

5749 Origin And Evolution, 5759 Rings And Dust, 6275 Saturn

Scientific paper

Strong evidence implies that small moons near the giant planets, like the asteroids they resemble, are best described as piles of rubble. These re-constituted small bodies are the source of material for planetary rings. Previous calculations by Colwell and Esposito show the short lifetimes for such moons imply that we are nearly at the end of the age of rings. Does this philosophically unappealing result truly describe our solar system and the rings that may surround giant extra-solar planets? Calculations from a Markov chain model explicate how inclusion of recycling can lengthen the lifetime of rings and moons. Non-linear effects not previously considered are also important. We apply our results to Saturn's F ring and to Neptune's ring arcs.

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