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Identifying Active Kelvin-Helmholtz Vortices on Saturn's Magnetopause Boundary

Delamere, P. A.; Johnson, J. R.; Burkholder, B. L. +1 more

For ∼2,000 Cassini magnetopause encounters, we analyse plasma and magnetic fields. The boundary can be unstable to the Kelvin-Helmholtz instability (KHI), which can drive large-scale flows identifiable in plasma measurements. Bulk flow reversed from the expected direction near the magnetopause can indicate vorticity associated with active KH, and …