Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979icar...39..214s&link_type=abstract
Icarus, vol. 39, Aug. 1979, p. 214-231.
Astronomy and Astrophysics
Astronomy
2
Interferometry, Radio Astronomy, Saturn (Planet), Saturn Rings, Albedo, Astronomical Models, Brightness Temperature, Electromagnetic Scattering, Optical Thickness
Scientific paper
Interferometric observations of Saturn and its rings obtained at the Owens Valley Radio Observatory at a wavelength of 3.71 cm (8085 MHz) are presented. Models of the microwave brightness structure of the Saturn system are fit to the observations in order to estimate the brightness temperatures of the planet and its rings. The models allowed making estimates of the brightness temperatures and optical depths of the A, B, and C rings. The ring brightness temperatures and optical depths are compared with a physical ring model of isotropic scatterers in a layer which is many particles thick. The observations are consistent with particles that conservatively scatter the thermal emission from Saturn to the earth and emit no thermal radiation of their own. However, the particle single-scattering albedo that would be most consistent with the observations is slightly less than unity but probably greater than 0.95. There is evidence indicating that the ring particles must be at least a few centimeters in size.
Berge Glenn L.
Muhleman Duane O.
Schloerb Peter F.
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