First Results of ISO-SWS Grating Observations of Saturn

Details First Results of ISO-SWS Grating Observations of Saturn First Results of ISO-SWS Grating Observations of Saturn

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996dps....28.1904d&link_type=abstract

American Astronomical Society, DPS meeting #28, #19.04; Bulletin of the American Astronomical Society, Vol. 28, p.1128

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The spectrum of Saturn has been recorded between 2.3 and 15 mu m, on June 13, 1996, with the grating mode of the Short-Wavelength Spectrometer of ISO (Infrared Space Observatory). The resolving power is about 1500 and the sensitivity is better than 1 Jy. As compared to Jupiter, the spectrum of Saturn is characterized by a higher signal at 3 mu m, as compared to the 2.75 mu m value, and a weaker signal in the 5-mu m region, due to Saturn's lower temperature. The main differences between the Jupiter and Saturn spectra are mainly due to a lower NH_3 mixing ratio and higher mixing ratios of PH_3, CH_4, C_2H_2 and C_2H_6 in Saturn's atmosphere as compared to their values in Jupiter. A preliminary modelling will be presented and estimates of the mixing ratios and/or vertical distributions of minor atmospheric species will be inferred.

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