Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pkas...10..127k&link_type=abstract
Publications of the Korean Astronomical Society, vol.10, no.1, p.127-134
Astronomy and Astrophysics
Astronomy
1
Scientific paper
Recent discovery of an Io-related features in Jupiter's auroral regions prompted us to search fot an OI multiplet at 1304 A in IUE aurora spectra. In three independent IUE spectra taken on January 18, 1981, we found an emission structure at 1304 A, with a signal-to-noise of about three. If the structure is due to the OI emission, then it is direct evidence of oxygen ion precipitation, which may originate from Io and Io torus. The emission rates of the H2 band systems and the OI multiplet are about 50 kR and 150 R, respectively. We have constructed high resolution model spectra with the estimated emission rates of H2, OI and SI for the Goddard High Resolution Spectrograph(GHRS) onboard the Hubble Space Telescope. The model spectra clearly shows the OI and SI multiplets separated from crowded H2 Lyman and Werner band lines, and therefore it is promising to detect the OI and SI multiplets with GHRS. Given the possibility that the Io-related feature may be caused by ion precipitations from the Io flux tube, it is likely that the OI emission may be detected in the footprint area of the Io flux tube.
Kim Sang J.
Kim Yong H.
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