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Spectra of SO2 frost for application to emission observations of Io

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Abstract

We have obtained, and describe here, laboratory reflection spectra of SO2 frost from 6 to 14 µm. For rapid deposition of the frost layer at a deposition temperature of 80 K, the frost exhibits a strong absorption band at 7.5 µm, consistent with the possible Voyager I identification of such a band due to suspended solid SO2 particles within Io's atmosphere. This compatibility does not, however, exist if the frost layer is formed at 140 K or if the layer is formed slowly. Thus it may be possible to obtain information concerning the particle formation process using more detailed laboratory SO2 frost spectra.

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Slobodkin, L., Buyakov, I., Triput, N. et al. Spectra of SO2 frost for application to emission observations of Io. Nature 285, 211–213 (1980). https://doi.org/10.1038/285211a0

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  • DOI: https://doi.org/10.1038/285211a0

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