Saturn in Hot Water: Simulations vs. Theory of the Enceladus Torus

Details Saturn in Hot Water: Simulations vs. Theory of the Enceladus Torus Saturn in Hot Water: Simulations vs. Theory of the Enceladus Torus

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm23c1638f&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM23C-1638

Physics

[2756] Magnetospheric Physics / Planetary Magnetospheres, [5780] Planetary Sciences: Fluid Planets / Tori And Exospheres, [6280] Planetary Sciences: Solar System Objects / Saturnian Satellites

Scientific paper

Enceladus' celebrated plumes feed a torus of water vapor around Saturn. The torus molecules are subject to interactions with solar photons, pickup ions, electrons and each other. Farmer (2009) used an analytic approach to assess the importance of water-water collisions, and found that such collisions should produce as much broadening and heating of the torus as the neutral-ion collisions considered by Johnson et al. (2006). We now present results from our new Direct Simulation Monte Carlo code which models the Enceladus torus in detail: we compare analytic and simulation results and investigate the validity of each approach, paying particular attention to the physics involved. Cassini INMS and Hubble Space Telescope measurements are used to place constraints on both methods.

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