An upper limit on shepherding satellites at Saturn's Ring G

Details An upper limit on shepherding satellites at Saturn's Ring G An upper limit on shepherding satellites at Saturn's Ring G

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986iowa.rept.....v&link_type=abstract

Progress Report Iowa Univ., Iowa City. Dept. of Physics and Astronomy.

Astronomy and Astrophysics

Astronomy

Planetary Magnetospheres, Saturn (Planet), Saturn Rings, Natural Satellites, Particles, Signatures

Scientific paper

A simplified analytical theory of the absorption of energetic magnetospheric particles by an inert satellite is developed for the case in which the radius b of the satellite is much less than the equatorial gyroradius rg of the particle which, in turn, is very much less than the radius r of the satellite's orbit. This theory and the observed particle-absorption signatures of Saturn's Ring G are used to establish an upper limit on shepherding satellites associated with the ring. The resulting upper limit, ignoring the absorption of the optically observed particulate matter, is b = 3.3 km (accurate to a factor of two) for a single satellite or sum from i = 1 to n of b squaredi = 11.2 sq km (accurate to a factor of four) for an assemblage of n satellites of various radii bi. No shepherding satellites at Ring G have been detected optically.

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