University of Cambridge > > DAMTP Astro Mondays > Propeller Structure Induced in Saturn's Rings by Embedded Moonlets

Propeller Structure Induced in Saturn's Rings by Embedded Moonlets

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Dr Geoffroy Lesur.

The size distribution of Saturn’s ring particles is constrained by Voyager and Cassini data to roughly follow a (differential) power law with exponent near -2.75 to -3 ranging between 10cm to about 10m. A population of larger particles, following a much steeper distribution, was predicted by Cuzzi et al, (1984, Planetary Rings, Arizona Press). The response of the ring on the gravitational perturbation of such a 100m to km sized boulder, showing a characteristic propeller shaped signature, was calculated by Spahn and Sremcevic, AA 358 , 2000, 368, including the effect of ring viscosity. Such propellers, indicative of moolets embedded in the rings, were discovered in Cassini images of Saturn’s A ring. Interestingly they appear concentrated in a relatively narrow radial region. In this talk I review theoretical aspects of the propellers, the Cassini data, and possible interpretations.

This talk is part of the DAMTP Astro Mondays series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.


© 2006-2022, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity