Temporal Changes in Europa's UV Spectra

Details Temporal Changes in Europa's UV Spectra Temporal Changes in Europa's UV Spectra

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998dps....30.3606d&link_type=abstract

American Astronomical Society, DPS meeting #30, #36.06; Bulletin of the American Astronomical Society, Vol. 30, p.1082

Astronomy and Astrophysics

Astronomy

Scientific paper

Comparisons of International Ultraviolet Explorer (IUE) observations taken from 1984-1986 with similar observations taken in 1996 show the first detection of temporal changes in the UV spectral reflectance of the Jupiter-facing quadrant of Europa's leading hemisphere. The temporal variations are most pronounced between 15(o) -75(o) longitude. The short time scale in which these temporal changes were produced is commensurate with possible resurfacing events. The central trailing hemisphere region displays a 0.28 mu m SO_2 absorption that has remained constant in relative depth over the past decade to within the instrument detection limits. A new, but currently unidentified, absorption feature at 0.33 mu m is detected on the leading hemisphere.

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