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IUE's view of Callisto: Detection of an SO 2 absorption correlated to possible torus neutral wind alterations
Author(s) -
Lane Arthur L.,
Domingue Deborah L.
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl00884
Subject(s) - absorption (acoustics) , torus , feature (linguistics) , jupiter (rocket family) , physics , wavelength , astronomy , astrophysics , astrobiology , optics , geometry , mathematics , linguistics , philosophy , space shuttle
Observations taken with the International Ultraviolet Explorer (IUE) detected a 0.28 µm absorption feature on Callisto's leading and Jupiter‐facing hemispheres. This feature is similar to Europa's 0.28 µm feature, however it shows no correlation with magnetospheric ion bombardment. The strongest 0.28 µm signature is seen in the region containing the Valhalla impact. This absorption feature also shows some spatial correlation to possible neutral wind interactions, suggestive of S implantation (rather than S x ) into Callisto's water ice surface. Indications of possible temporal variations (on the 10% level) are seen at other wavelengths between the '84–'86 and the '96 observations.