Upper limits to trace constituents in Jupiter's atmosphere from an analysis of its 5 micrometer spectrum

Astronomy and Astrophysics – Astronomy

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Abundance, Atmospheric Composition, Infrared Spectra, Jupiter Atmosphere, Spectrum Analysis, Airborne Equipment, Astronomical Spectroscopy, Infrared Astronomy, Remote Sensors, Jupiter, Atmosphere, Chemical Composition, Spectrum, Concentrations, Gases, Analysis

Scientific paper

A high-resolution spectrum of Jupiter at 5 micrometers recorded at the Kuiper Airborne Observatory is used to determine upper limits to the column density of 19 molecules. The upper limits to the mixing ratios of SiH4, H2S, HCN, and simple hydrocarbons are discussed with respect to current models of Jupiter's atmosphere. These upper limits are compared to expectations based upon the solar abundance of the elements. This analysis permits upper limit measurements (SiH4), or actual detections (GeH4) of molecules with mixing ratios with hydrogen as low as 10 to the minus 9th power. In future observations at 5 micrometers the sensitivity of remote spectroscopic analyses should permit the study of constituents with mixing ratios as low as 10 to the minus 10th power, which would include the hydrides of such elements as Sn and As as well as numerous organic molecules.

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