Abstract
We measured an upper limit to the mean intensity over an 8-arcsec 2 illuminated beam for the S 1(1) H 2 quadrupole emission near Jupiter's northern auroral UV/thermal “hot spot” at λ III(1985) = 180°. This is 4.2 × 10 −6 W m −2sr −1. Using higher resolution spectra, we observed a weak emission feature at the wavelength of this line with an intensity of (4.1 ± 1.1) × 10 −7 W m −2 sr −1 near λ III(1965) = 245°. These intensities are lower than those predicted by Kim and Maguire (1986), suggesting that species, such as atomic hydrogen in the aurora, may be playing a greater role in the collisional deexcitation of H 2 than supposed.
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