Aperture synthesis observations of Saturn and its rings at 2.7-mm wavelength

Details Aperture synthesis observations of Saturn and its rings at 2.7-mm wavelength Aperture synthesis observations of Saturn and its rings at 2.7-mm wavelength

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...70..506d&link_type=abstract

Icarus (ISSN 0019-1035), vol. 70, June 1987, p. 506-516.

Computer Science

13

Brightness Temperature, Interferometry, Saturn (Planet), Saturn Rings, Synthetic Apertures, Atmospheric Models, Atmospheric Scattering, Particle Size Distribution, Spatial Resolution, Saturn, Rings, Wavelengths, Interferometry, Brightness, Flux, Models, Temperature, Optical Properties, Depth, A Ring, B Ring, Scattering, C Ring, Emissions, Particles, Composition, Water Ice, Radio Methods, Earth-Based Observations, Procedure, Maps, Disk, Structure, Diagrams, Theoretical Studies, Calculations

Scientific paper

The authors present 2.7-mm interferometric observations of Saturn made near opposition in June 1984 and June 1985, when the ring opening angle was 19° and 23°, respectively. By combining the data sets they produce brightness maps of Saturn and its rings with a resolution of 6arcsec. Modelfits to the visibility data yield a disk brightness temperature of 156±5°K, a combined A, B, and C ring brightness temperature of 19±3°K, and a combined ring cusp (region of the rings which block the planet's disk) brightness temperature of 85±5°K. These results imply a normal-to-the-ring optical depth for the combined A-B-C ring of 0.31±0.04. The results are consistent with the idea that the ring particles are composed chiefly of water ice.

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