Monte Carlo simulations of the Plumes on Enceladus

Details Monte Carlo simulations of the Plumes on Enceladus Monte Carlo simulations of the Plumes on Enceladus

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.1504t&link_type=abstract

American Astronomical Society, DPS meeting #38, #15.04; Bulletin of the American Astronomical Society, Vol. 38, p.508

Astronomy and Astrophysics

Astronomy

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 4-6x1027 s-1, or 120-180 kg/s, consistent with previous analysis, and more than 1000 times the estimated mass escape rate for ice particles. The average deposition rate in the South Polar region is on the order of 1011 cm-2 s-1. The globally averaged deposition rate of water molecules is about one order of magnitude lower. The resurfacing rate in the South Polar region can be as high as 10-4 cm/yr. Comparisons between the simulation results and the INMS observations will be reported.

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