Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004acasn..45..279b&link_type=abstract
Acta Astronomica Sinica, vol. 45, no. 3, p. 279-287
Astronomy and Astrophysics
Astronomy
Planets And Satellites: Jupiter, Comets: Sl-9, Gravitational Waves
Scientific paper
After the collision between Comet Shoemaker-Levy 9 (SL9)and Jupiter, some ring structures propagating outwards at constant speed (~ 450m/s) were observed on the surface of Jupiter, which implicates these rings are linear waves caused by the collision. A linear model of the comet's collision with Jupiter is presented, in which Jovian atmosphere is considered as a non-rotated, inviscid, stratified and incompressive fluid layer which moves at a speed of U=b+az . We take an initial impulsive pressure p=(r;0) as the initial condition and use fluid dynamics equations to solve the inertia-gravity waves. It is found that most of the perturbation energy are used to produce the internal waves when Jovian atmosphere moves at constant speed (U=U0(~170m/s)). The relationship between impacting depth H of comet's fragments and horizontal phase speed vp is deduced. Finally, We discuss the inertia gravity waves when U=b+az and it is found the perturbation energy is not divided equally between kinetic energy and potential energy because of the effect of shear.
Bao Gang
Cheng D. H.
Ma Ying-Hong
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