The Jovian ammonia abundance from interferometric observations of limb darkening at 3.4 MM

Details The Jovian ammonia abundance from interferometric observations of limb darkening at 3.4 MM The Jovian ammonia abundance from interferometric observations of limb darkening at 3.4 MM

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982icar...49...17v&link_type=abstract

Icarus, vol. 49, Jan. 1982, p. 17-26. Research supported by the University of California;

Mathematics

5

Abundance, Ammonia, Atmospheric Models, Jupiter Atmosphere, Limb Darkening, Microwave Interferometers, Atmospheric Temperature, Brightness Distribution, Hydrogen, Molecular Gases, Planetary Evolution, Planetary Temperature, Temperature Profiles, Jupiter, Ammonia, Abundance, Interferometry, Observations, Darkening, Limbs, Wavelengths, Brightness, Hydrogen, Mixing, Nitrogen, Depth, Mathematical Models, Parameters, Temperature, Optical Properties, Data, Comparisons

Scientific paper

The relative abundances of the various atomic and molecular constituents in the Jovian atmosphere are important data for studies of the origin of the solar system. The determination of the ammonia abundance presents a number of difficulties. However, difficulties related to a use of the microwave sensing technique can be largely overcome by measuring the brightness distribution across the disk. In particular, information about the atmosphere can be obtained from the degree of limb darkening, which requires only a relative brightness measurement as opposed to an absolute measurement. Valdes and Welch (1978) have used the considered approach in a study of Jupiter at 1.3 cm. In the present investigation a more general relation between the amount of limb darkening in the broad 1.25-cm inversion band of ammonia and the ammonia abundance is derived. The model is applied to new measurements of Jupiter's limb darkening at 3.4 mm.

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