Other
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.p11b1227w&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #P11B-1227
Other
[5719] Planetary Sciences: Fluid Planets / Interactions With Particles And Fields, [5737] Planetary Sciences: Fluid Planets / Magnetospheres, [5780] Planetary Sciences: Fluid Planets / Tori And Exospheres, [6281] Planetary Sciences: Solar System Objects / Titan
Scientific paper
Titan's atmosphere emits energetic neutral atoms (ENAs), which are being monitored for the first time by the Cassini spacecraft. These ENAs are generated by charge exchange processes of energetic ions with neutrals from Titan's atmosphere. In this work we investigate the morphology of the ENA emission from Titan's atmosphere with a three-dimensional model that calculates the phase space density of the charge exchanging energetic ion population in the vicinity of Titan. With the model ion distribution we calculate the resulting ENA distribution and then generate maps of the ENA emission on a sphere above Titan's atmosphere. We demonstrate that the strongly draped magnetic field lines play an essential role in shaping the ENA-morphology. Spatially constant magnetic and electric fields are not consistent with ENA observations from the TA flyby. Observations of ENAs from Titan thus can be used in turn to monitor the electrodynamically complex environment as a whole, which is otherwise only accessible with local measurements along single trajectories.
Mitchell Donald G.
Saur J. S.
Simon Steven
Strobel Darrell F.
Wulms Veit
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