Physics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja....10823f&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #10823
Physics
Scientific paper
The dynamical evolution of dense ring systems is strongly dependent on interparticle collisions and their mutual gravitational interactions. The ring local thickness due to vertical random motions and the energy stored in spins of particles during collisions both reflect this microphysics of rings. This has been increasingly explored theoretically or numerically during the past two decades. Yet only limited knowledge exist on the vertical structure and dynamics or on the spin and surface properties of ring particles which control the output of collisions. Observations of ring temperatures provide unique or independent constraints on the local ring dynamics as well as on the particles properties. Only Saturn's rings have been detected yet in thermal infrared. I will present the results of recent ground-based observations of Saturn's rings by the CAMIRAS infrared camera concerning thermal properties and spin of particles. Spacecraft observations are still needed to more accurately constrain the spin: I will discuss current studies and futures plans on this topic.
Ferrari Cecile
Leyrat Cedric
Spilker Linda J.
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