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Models of Saturn's Rings Which Satisfy the Optical Observations∗

Published online by Cambridge University Press:  14 August 2015

Y. Kawata  and
W. M. Irvine
Y. Kawata
Affiliation:
Dept. of Physics and Astronomy, University of Massachusetts, Amherst, Mass., U.S.A.
W. M. Irvine
Affiliation:
Dept. of Physics and Astronomy, University of Massachusetts, Amherst, Mass., U.S.A.

Abstract

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A theoretical model of Saturn's rings is investigated which includes the shadowing effect and realistic anisotropic phase functions for the ring particles. The effects of multiple scattering and the finite size of the Sun, including the penumbra, are rigorously included. The permissible range of the relevant parameters, including optical thickness, single scattering albedo, volume density, and phase function are investigated by comparing the theoretical results to observations of the ring brightness vs phase angle, wavelength, and elevation of the Sun and Earth. Anisotropic scattering by the ring particles is necessary in order to match the observations. The colour dependence of the opposition effect is interpreted in terms of the albedo spectrum of the ring particles.

Type
Part III Outer Planets and Their Satellites
Information
Symposium - International Astronomical Union , Volume 65: Exploration of the Planetary System , 1974 , pp. 441 - 464
Copyright
Copyright © Reidel 1974 

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