Physics
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984chjss...4..105p&link_type=abstract
Chinese Journal of Space Science, vol. 4, April 1984, p. 105-111. In Chinese, with abstract in English.
Physics
3
Kelvin-Helmholtz Instability, Magnetohydrodynamic Waves, Magnetopause, Planetary Magnetospheres, Saturn Atmosphere, Surface Waves, Magnetohydrodynamic Stability, Magnetosheath, Space Plasmas, Voyager 1 Spacecraft
Scientific paper
The surface waves on Saturn's magnetopause are studied by examining the Kelvin-Helmholtz (K-H) instability at the interface between the magnetosheath and the magnetosphere. It is demonstrated that the relative motion between corotating magnetospheric plasma and flowing magnetosheath plasma can provide free energy to generate the K-H instability at the magnetopause. On the afternoon side, the closer to the subsolar point, the more unstable is the magnetopause; and the instability conditions are satisfied most easily in the morning region. Using the MHD approximation and for parameters selected to represent the Voyager-1 inbound magnetopause crossing at Saturn, the wave characteristics which are in good agreement with the corresponding estimated values of observations reported by Lepping et al. (1981) are obtained.
Galland Kivelson Margaret
Pu Zu Yin
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