Sputtering of Titan's atmosphere by Saturn's magnetospheric ions

Details Sputtering of Titan's atmosphere by Saturn's magnetospheric ions Sputtering of Titan's atmosphere by Saturn's magnetospheric ions

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....7464m&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #7464

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Scientific paper

The nitrogen rich atmosphere of Titan is a significant source of the neutrals in Saturn's magnetosphere. As Titan does not posses an intrinsic magnetic field, energetic Kronian magnetospheric ions and electrons may be able to penetrate Titan's atmospheric exobase. Penetration by energetic ions is described here using 1-D and 3-D Monte Carlo models. The incident ions can lead directly or indirectly to the production of fast neutrals that collide with other atmospheric neutrals. This leads to dissociation and the ejection of both atomic and molecular nitrogen. One-dimensional models for the sputtering of Titan's atmosphere by the corotating plasma flow have been reported by Lammer et al. (1998) and Shematovich et al. (2001). Brecht et al. (2000) has given the flux and energy spectra of impacting co-rotating and pick up ions. The lower energy pick-up ions are shown to be more efficient in ejecting material from Titan's atmosphere than the deflected co-rotating ions. This data is used as the input data in the present detailed three-dimensional model and the results are used as a source of nitrogen for the Saturnian plasma torus. Brecht, S.H., J.G. Luhmann, and D.J. Larson, J. Geophys. Res., 105, 13119, 2000. Lammer, H. W. Stumptner, and S.J. Bauer, Planet. Space Sci., 46, 1207, 1998. Shematovich, V.I., C. Tully, and R.E. Johnson, Adv. Space Res., 27, 1875, 2001.

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