Europa's ultraviolet absorption band (260 to 320 nm) - Temporal and spatial evidence from IUE

Details Europa's ultraviolet absorption band (260 to 320 nm) - Temporal and spatial evidence from IUE Europa's ultraviolet absorption band (260 to 320 nm) - Temporal and spatial evidence from IUE

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...70..499o&link_type=abstract

Icarus (ISSN 0019-1035), vol. 70, June 1987, p. 499-505.

Computer Science

12

Absorption Spectra, Europa, Iue, Spatial Distribution, Temporal Distribution, Ultraviolet Absorption, Data Reduction, Io, Spectrum Analysis, Sulfur Dioxides, Jupiter, Satellites, Europa, Ultraviolet, Wavelengths, Absorption, Io, Iue Satellite, Satellite Observations, Spectra, Optical Properties, Ions, Longitude, Phase Angles, Surface, Sulfur Dioxide, Laboratory Studies, Concentration, Comparisons, Formation, Origin, Plasma Torus, Water Ice, Photometry, Contamination

Scientific paper

The authors have analyzed 33 ultraviolet spectra of Jupiter's satellite Europa that they obtained with the International Ultraviolet Explorer (IUE) satellite from 1978 to 1982. The observations span orbital phase angles (longitudes) 21° to 343°. It is confirmed that the previously reported absorption feature is centered at 280 nm, and is most apparent when spectra from orbital phase angles 223° to 333° (trailing side) are ratioed to those at or near 90° (leading side). It has been found that the strength of this feature is unchanged over the 5-year period of this study, to at least 20%. The authors have compared this feature to laboratory spectra and confirm similarities with sulfur dioxide gas. These results support the hypothesis of Lane et al. (1981) that the feature is created by the presence of sulfur ions from Io's plasma torus.

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