Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977icar...30..769g&link_type=abstract
Icarus, vol. 30, Apr. 1977, p. 769-779.
Astronomy and Astrophysics
Astronomy
14
Celestial Mechanics, Natural Satellites, Particle Size Distribution, Planetary Evolution, Saturn Rings, Terrestrial Planets, Astronomical Models, Mercury (Planet), Moon, Ring Structures, Venus (Planet)
Scientific paper
Harris (1975) has suggested that the maximum size of particles in a planetary ring is controlled by collisional fragmentation rather than tidal stress. While this conclusion is probably true, estimated radius limits must be revised upward from Harris' values of a few kilometers by at least an order of magnitude. Accretion of particles within the Roche limit is also possible. These considerations affect theories concerning the evolution of Saturn's rings, of the moon, and of possible former satellites of Mercury and Venus. In the case of Saturn's rings, comparison of various theoretical scenarios with available observational evidence suggests that the rings formed from the breakup of larger particles rather than from original condensation as small particles. This process implies a distribution of particle sizes in Saturn's rings possibly ranging up to about 100 km but with most of the cross section in centimeter-scale particles.
Chapman Clark R.
Davis Donald R.
Greenberg Richard
Hartmann William K.
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