Physics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusm.p32a..02w&link_type=abstract
American Geophysical Union, Spring Meeting 2009, abstract #P32A-02
Physics
6008 Composition (1060), 6024 Interiors (8147), 6063 Volcanism (5480, 8450), 6280 Saturnian Satellites
Scientific paper
Observations made with the Cassini Ion and Neutral Mass Spectrometer (INMS) during two close flybys of Enceladus on 12 March and 9 October 2008 reveal the presence of ammonia, complex organics such as benzene, and deuterium in the gas plume as well as the probable presence of radiogenic argon. The INMS data provide compelling evidence for the existence -- today or in the recent past -- of liquid water in Enceladus' interior and support a hybrid model for the source of the plume, with contributions from both degassing volatile- charged ice (in the form of clathrate hydrates) and material that is or recently was in a reservoir of liquid water. The measurement of the ratio of deuterium to hydrogen is the first such measurement at an icy satellite and is consistent with the accretion of Enceladus from planetesimals formed in the solar nebula in the region of the giant planets
Brockwell T.
Glein Christopher
Lewis William S.
Lunine Jonathan I.
Magee Brian
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