Moonte Carlo Simulations of the Plumes on Enceladus

Details Moonte Carlo Simulations of the Plumes on Enceladus Moonte Carlo Simulations of the Plumes on Enceladus

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.p22b..06t&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #P22B-06

Physics

6280 Saturnian Satellites

Scientific paper

Monte Carlo simulations show that the July 14, 2005 UVIS stellar occultation observations of the water vapor plume on Enceladus can be best explained by water molecules ejected at a vertical surface velocity of 300-500 m/s along the Tiger Stripes in the south polar region of Enceladus. The high surface velocity suggests that the plume on Enceladus originates from some depth beneath the surface. The total escape rate of water molecules is 120-180 kg/s. Comparisons between the simulation results and the INMS observations during the same flyby suggests that the plumes on Enceladus are highly variable either in time or in space. Preliminary analysis suggests that the average deposition rate of water molecules in the South Polar region is on the order of 1e11 cm-2s-1. The globally averaged deposition rate of water molecules is about one order of magnitude lower. Relationship between the deposition rate and the surface velocity of the plume will be analyzed. Deposition patterns for icy particles ejected from the plumes will be reported.

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