Abstract
We present the results of a spectroscopic study of the H+3infrared emissions of Jupiter, obtained using the United Kingdom Infrared Telescope (UKIRT) on Mauna Kea, Hawaii, during May 3–5, 1993. Although we have obtained data from the whole of the planet, in this paper we concentrate on the auroral regions. Derived H+3temperatures for these vary between 700 and 1000 K, and column densities are of the order of 1012cm−2. There is a strong (anti-)correlation between these parameters, however, that requires the introduction of new variables to characterize the jovian auroras fully. The total H+3auroral emission is presented as a function of central meridian longitude. A simple geometric model of this emission does not describe the data adequately. The integrated infrared auroral emission in each hemisphere is of the order of a few × 1012W, making it comparable to auroral output in the ultraviolet.
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