A study of the 1.56-micron NH3 band on Jupiter and Saturn

Details A study of the 1.56-micron NH3 band on Jupiter and Saturn A study of the 1.56-micron NH3 band on Jupiter and Saturn

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....54..291o&link_type=abstract

Astronomy and Astrophysics, vol. 54, no. 1, Jan. 1977, p. 291-295.

Astronomy and Astrophysics

Astronomy

11

Ammonia, Infrared Astronomy, Jupiter (Planet), Saturn (Planet), Spectrum Analysis, Abundance, Continuous Spectra, Gas Analysis, Jupiter Atmosphere, Spectral Energy Distribution, Sulfur Compounds

Scientific paper

Spectra of Jupiter and Saturn in the region near 1.56 microns have been obtained at a resolution of 0.09 and 0.20 per cm, respectively. These spectra are analyzed with the aid of laboratory ammonia spectra recorded at temperatures as low as 183 K. The low-temperature ammonia spectra provide a satisfactory interpretation of the spectrum of Jupiter, leading to an ammonia abundance of 3 + or - 1 m am. No ammonia was detected on Saturn. The discrepancy between these results and previous abundances derived from observations at shorter wavelengths is discussed. Upper limits of 1.2 millionth and 4 ten-millionths are set on the mixing ratio H2S/H2 for Jupiter and Saturn, respectively. Other sulfur compounds must be present on Jupiter to account for the resulting disagreement with solar abundances.

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