Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.p51e1177s&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #P51E-1177
Physics
[5405] Planetary Sciences: Solid Surface Planets / Atmospheres, [6005] Planetary Sciences: Comets And Small Bodies / Atmospheres, [6221] Planetary Sciences: Solar System Objects / Europa
Scientific paper
The Advanced Camera for Surveys on the Hubble Space Telescope observed Europa on June 29, 2008 during five consecutive orbits. Europa was at eastern elongation and crossed the Jovian current sheet during the observing interval. The observations were performed with ACS/SBC with prism PR130L to separate the two prominent FUV oxygen lines OI 1304 A, OI 1356 A and to discriminate reflected solar light from Europa's surface. After addressing the strong red leak contained in the measurements, we find that Europa's atmospheric emission clearly depends on Europa's position in Jupiter's current sheet. We also see that the atmospheric emissions of Europa's leading side do not show pronounced asymmetries with respect to Europa's sub-Jovian and anti-Jovian side. Previous observations of the atmospheric emissions, in contrast, found a strong asymmetry on Europa's trailing side [McGrath et al. 2004].
Feldman Paul D.
Gérard Jean-Marc
Grodent Denis C.
McGrath Melissa A.
Retherford Kurt D.
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