On the azimuthal brightness variations of Saturn's rings

Details On the azimuthal brightness variations of Saturn's rings On the azimuthal brightness variations of Saturn's rings

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978icar...33..279f&link_type=abstract

Icarus, vol. 33, Feb. 1978, p. 279-287.

Astronomy and Astrophysics

Astronomy

22

Brightness, Gravitational Effects, Saturn Rings, Astronomical Photometry, Periodic Variations, Planetology, Saturn, Rings, Brightness, Density, Gravity, Azimuth, Light (Visible Radiation), Particles, Particle Interactions, Optical Properties

Scientific paper

A simple semiquantitative explanation is presented which accounts both for the presence of the azimuthal brightness variations in Saturn's ring A and for their absence in ring B. This explanation avoids any ad hoc reliance on albedo variations and/or synchronous rotation of ring particles. Instead, it requires only some degree of self-gravitation between nearby orbiting bodies. A bias in the particle distribution and corresponding photometric effects are thereby produced the latter corresponding very closely to the variations observed in ring A. Their absence in ring B is primarily a consequence of the higher optical thickness and decreasing importance of self-gravitation in that ring.

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