Spectrophotometry of Inner Jovian Satellites

Details Spectrophotometry of Inner Jovian Satellites Spectrophotometry of Inner Jovian Satellites

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6552z&link_type=abstract

HST Proposal ID #6552

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Hst Proposal Id #6552 Solar System

Scientific paper

We propose spectrophotometry with the Faint ObjectSpectrograph of the inner Jovian satellites Amalthea, Thebe,and Metis, which are difficult or impossible to observe fromthe ground. A paired-aperture technique will be used foraccurate measurements of the scattered light from Jupiter. Weexpect to get good spectra to wavelengths as short as 0.25microns for Amalthea and Thebe and 0.27 microns for Metis.The results will be interpreted with a combination ofastronomical, experimental, and theoretical efforts, includingreference to laboratory reflectance spectra for a wide varietyof sulfur-bearing compounds and comparison to astronomicaldata for other dark, red objects in the solar system. Weexpect to: (1) Determine if Amalthea, Metis and Thebe sharesimilar spectral characteristics; (2) Better determine theleading/trailing spectral asymmetry of Amalthea, Thebe and, ifit exists, Metis; (3) Determine if sulfur compounds have beentransported inward from Io to these satellites as theleading/trailing asymmetries suggest; (4) Obtain a spectralsignature for the bright spot Gaea on Amalthea using spectraldemixing; (5) Obtain the observational data needed to directlaboratory experiments on sulfur-silicate micrometeoriticglass production and sulfur ion implantation; and (6) Provideinsight into the micrometeorite/contaminate process on airlessbodies as a benchmark for understanding space weathering onasteroids and the satellites of Saturn.

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