Europa in Eclipse: Tenuous Atmosphere, Electromagnetic Activity and Surface Luminescence

Details Europa in Eclipse: Tenuous Atmosphere, Electromagnetic Activity and Surface Luminescence Europa in Eclipse: Tenuous Atmosphere, Electromagnetic Activity and Surface Luminescence

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hst..prop11085s&link_type=abstract

HST Proposal ID #11085. Cycle 15

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Scientific paper

We propose to image Europa during its orbital eclipse by Jupiter. This will form the basis of an investigation into the nature of the tenuous atmosphere, electromagnetic environment and surface material of Europa. We will compare the FUV oxygen line at 1356A to the optical line at 6300A and seek optical auroral hydrogen emission in Halpha. With broad continuum filters, we will search for optical emissions from other atmospheric constituents and for fluorescence of the surface material, arising from the very high level of incident energetic particle radiation. The high spatial resolution of ACS will allow us to fully resolve scales of interest and allow us to distinguish easily the different terrains on Europa's surface. In particular we wish to compare luminesence in regions dominated by ice to those of potentially organic red material.

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