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Implications from secondary emission from neutral impact on Cassini plasma and dust measurements

Edberg, N. J. T.; Vigren, E.; Eriksson, A. I. +4 more

We investigate the role of secondary electron and ion emission from impact of gas molecules on the Cassini Langmuir probe (RPWS-LP or LP) measurements in the ionosphere of Saturn. We add a model of the emission currents, based on laboratory measurements and data from comet 1P/Halley, to the equations used to derive plasma parameters from LP bias v…

Impacts of zonal winds on planetary oscillations and Saturn ring seismology

Fuller, Jim; Dewberry, Janosz W.; Mankovich, Christopher R.

The excitation of density and bending waves in Saturn's C ring by planetary oscillation modes presents a unique opportunity to learn about gas giant interiors and rotation. However, theoretical complications related to Saturn's rapid and differential rotation pose a barrier to the full utilization of ring wave detections. We calculate oscillation …