Waves from the Shoemaker-Levy 9 impacts [chapter]

Andrew P. Ingersoll, Hiroo Kanamori, Keith S. Noll, Harold A. Weaver, Paul D. Feldman
The Collision of Comet Shoemaker-Levy 9 and Jupiter  
Images of Jupiter taken by the Hubble Space Telescope (HST) reveal two concentric circular rings surrounding five of the impact sites from comet Shoemaker-Levy 9 (SL9). The rings are visible 1.0 to 2.5 hours after the impacts. The outer ring expands at a constant rate of 450 ms-1 . The inner ring expands at about half that speed. The rings appea1· to be waves. Other features (diffuse rings and crescent) further out appear to be debris thrown out by the impact. Sound waves (p-modes), internal
more » ... modes), internal gravity waves (g-modes), surface gravity waves (!-modes), and rotational waves ( r-modes) all are excited by the impacts. Most of these waves do not match the slow speed, relatively large amplitude, and narrow width of the observed rings. Ingersoll and Kanamori have argued that internal gravity waves trapped in a stable layer within the putative water cloud are the only waves that can match the observations. If they a re correct, and if moist convection in the water cloud is producing the stable layer, then the 0 /H ratio on Jupite1· is roughly ten times that on the Sun.
doi:10.1017/cbo9780511525056.017 fatcat:cyser2y7o5adraja7gjna3rqtm