Other
Scientific paper
Apr 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...46....4f&link_type=abstract
Icarus, vol. 46, Apr. 1981, p. 4-17.
Other
25
Astronomical Models, Brightness Temperature, Infrared Reflection, Saturn Rings, Solar Position, Angular Correlation, Particle Size Distribution, Solar Heating, Thermodynamic Equilibrium, Saturn, Rings, Brightness, Infrared, Wavelengths, Shadows, Photometry, Models, Temperatures, Data, Comparisons, Optical Properties, Depth, A Ring, B Ring, C Ring, Radiation, Particles, Layers, Thickness
Scientific paper
The main subject of the discussed investigation is the infrared brightness variation of the A, B, and C rings, as a function of solar elevation. Existing models for the B ring are not entirely satisfactory. A description is presented of a model applicable to all three rings. This model and other existing models are compared with the available data. Particular attention is given to the 20-micrometer observations of Saturn's rings. It is found that the brightness variation of the A and B rings with solar elevation angle can be well modeled by an optically thick monolayer of particles, or equivalently, a flat sheet, emitting on one side only. This points to a temperature contrast between the two sides of the ring plane. The infrared brightness of the C ring increases as the solar elevation angle with respect to the ring plane decreases.
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