Other
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21110906t&link_type=abstract
American Astronomical Society, AAS Meeting #211, #109.06; Bulletin of the American Astronomical Society, Vol. 39, p.938
Other
Scientific paper
Saturn's ring system is an astrophysical disk that is neither light-years away nor billions of years in the past. We can visit this disk at close range and observe a number of phenomena that also operate in disks of other kinds. As a result, we see small-scale processes that shape ring texture, connect those processes to the bodies and structures that cause them, and watch closely as the disk changes with time.
Recent observations include: 1) "self-gravity wakes” (see Julian and Toomre 1966) dominating the texture of some ring regions; 2) km-sized "propeller-shaped” features caused by small (100-meter) moonlets embedded in the disk; 3) irregular edge shapes in the gaps opened up by larger ( 10 km) moons, which may hold clues to angular momentum transport; 4) resonant spiral density waves excited by more distant large moons, which serve as in situ probes of local disk density and viscosity; 5) waves whose form changes with time, due to the varying orbits of the moons Janus and Epimetheus. The latest results from the Cassini mission will be presented.
Cassini Imaging Team
Tiscareno Matthew S.
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