Photometry and polarimetry of Saturn's rings from Pioneer Saturn

Details Photometry and polarimetry of Saturn's rings from Pioneer Saturn Photometry and polarimetry of Saturn's rings from Pioneer Saturn

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.5948e&link_type=abstract

Journal of Geophysical Research, vol. 85, Nov. 1, 1980, p. 5948-5956.

Astronomy and Astrophysics

Astronomy

5

Astronomical Photometry, Pioneer 11 Space Probe, Polarimetry, Saturn Rings, Astronomical Models, Brightness, Optical Thickness, Saturn, Rings, Photometry, Polarimetry, Pioneer 11, Optical Properties, Depth, A Ring, B Ring, Opacity, C Ring, Particles, Comparisons, Data, Scattering, Albedo, Gradients, Polarization, Models, Intensity, Shadows, Properties, Brightness, Thickness, Wavelengths, Colors

Scientific paper

A profile of the average normal optical depth for Saturn's rings between 1.22 and 2.35 Saturn radii is examined. In the A and B rings, horizontal inhomogeneities make these values deceptive. A thinner component of the B ring with an optical depth below 0.08 covers up to 4% of its surface area. In the A ring, the more transparent component covers more than 7% of its area and has an optical depth greater than 0.10. These thinner parts of the rings would rarely be apparent from earth based observations. The particles of the C ring are larger than 15 microns and differ from those of the B and A rings. The C ring is either homogeneous with high albedo and forward scattering phase functions, or shows a gradient in albedo with distance from Saturn. Polarimetry of Saturn's ring provides only an upper limit (below 15%) which is consistent with ground-based predictions. Polarization in the outer A ring is negative.

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