On the Formation of Sodium Bearing E Ring Ice Grains on Enceladus

Details On the Formation of Sodium Bearing E Ring Ice Grains on Enceladus On the Formation of Sodium Bearing E Ring Ice Grains on Enceladus

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.3809s&link_type=abstract

American Astronomical Society, DPS meeting #41, #38.09

Astronomy and Astrophysics

Astronomy

Scientific paper

Small but significant concentrations of sodium have been detected by the Cassini Cosmic Dust Analyzer (CDA) in E ring ice grains (Postberg et al., Nature, 2009). Since Enceladus' plume is the dominant source of this dusty ring (Spahn et al., Science, 2006), the sodium must come from the interior of Enceladus. This is consistent with a plume originating from a liquid reservoir that has been, or is, in contact with the rocky core of the satellite, since in this case the liquid is expected to be enriched in minerals (Zolotov, GRL, 2007). However, the physical processes how these minerals find their way into the ice grains of Enceladus' plume are less clear. In this paper we discuss possible scenarios and relate them to the sodium concentrations found in CDA data.

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