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Far‐UV emissions from the SL9 impacts with Jupiter

Ballester, GE; Harris, WM; Gladstone, GR; Clarke, JT; Prangé, R; Feldman, PD; ... Liu, X; + view all (1995) Far‐UV emissions from the SL9 impacts with Jupiter. Geophysical Research Letters , 22 (17) 2425 - 2428. 10.1029/95GL02422. Green open access

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Abstract

Observations with the International Ultraviolet Explorer (IUE) during the impacts of the fragments of comet D/Shoemaker-Levy 9 with Jupiter show far-UV emissions from the impact sites within a similar to 10 min time scale. Positive detections of H-2 Lyman and Werner band (1230-1620 Angstrom) and H-Ly alpha emissions are made for impacts K and S, and marginally for P2. No thermal continuum is observed. The radiated far-UV output was >10(21) ergs. The H-2 spectrum is consistent with electron collisional excitation if significant CH4 absorption is included. Such emissions could result from plasma processes generated by the impacts. Non-thermal excitation by the high altitude entry and explosion shocks may also be relevant. Emissions by Al+ (1671 Angstrom) and C (1657 Angstrom) of cometary origin are tentatively identified.

Type:Article
Title:Far‐UV emissions from the SL9 impacts with Jupiter
Open access status:An open access version is available from UCL Discovery
DOI:10.1029/95GL02422
Publisher version:http://dx.doi.org/10.1029/95GL02422
Language:English
Additional information:Copyright 1995 by the American Geophysical Union
Keywords:Dayglow
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Science and Technology Studies

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