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Ultraviolet observations of the Io torus from the IUE observatoryThe short wavelength spectrograph on the International Ultraviolet Explorer (IUE) has been used to obtain 11 A resolution spectra of the Io torus from 1175-1950 A. The four spectra, obtained in the springs of 1979 and 1980, show emissions (about 40R) of S II A1256A and S III A1199A. An unidentified feature is also present at 1729 A; a tentative identification as an intercombination line of S III is proposed. Weak features, probably due to O III A1664A and S IV A1406A, appear in some of the spectra. Abundances of the ions are determined from the brightnesses of the observed features. Upper limits are also set for the abundances of a number of ionic and neutral species. An observation of Io itself does not show any additional or enhanced spectral features, permitting upper limits to be set on the injection rate for a number of species.
Document ID
19810059463
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Moos, H. W.
(Johns Hopkins Univ. Baltimore, MD, United States)
Clarke, J. T.
(Johns Hopkins University Baltimore, MD, United States)
Date Acquired
August 11, 2013
Publication Date
July 1, 1981
Publication Information
Publication: Astrophysical Journal
Subject Category
Lunar And Planetary Exploration
Accession Number
81A43867
Funding Number(s)
CONTRACT_GRANT: NSG-5393
Distribution Limits
Public
Copyright
Other

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