Gladstone GR, Hall DT, Waite JH. EUVE Observations of Jupiter During the Impact of Comet Shoemaker-Levy 9.
Science 1995;
268:1595-7. [PMID:
17754611 DOI:
10.1126/science.268.5217.1595]
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Abstract
The Extreme Ultraviolet Explorer (EUVE) satellite conducted extensive observations of the jovian system before, during, and after the impact of the fragments of comet Shoemaker-Levy 9 in July 1994. About 2 to 4 hours after the impacts of several of the larger fragments, the brightness of the neutral helium (He I) resonance line at 58.4 nanometers temporarily increased by a factor of about 10. The transient 58.4-nanometer brightenings are most simply explained by resonant scattering of sunlight from the widespread high-altitude remnants of the larger impact plumes. Other possible sources of emission, such as electron impact excitation of He or radiative recombination of He(+), may contribute to the observed signal.
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