Other
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ttt..work...17o&link_type=abstract
Through Time; A Workshop On Titan's Past, Present and Future, NASA Goddard Space Flight Center, April 6th - 8th, 2010. Edited b
Other
Scientific paper
The apparent absence of Kr and Xe from Titan's atmosphere can be convincingly attributed to their intrinsically low abundances, provided Titan sampled a reservoir with similar abundances to one of those on the Sun, Earth, Mars, Venus, meteorites or Earth's atmosphere. The remarkably high value of 14N/36Ar confirms the consensual hypothesis that Titan's nitrogen originated as NH3, not N2. This conclusion is supported by studies of nitrogen isotopes in Jupiter's atmosphere, comets, meteorites and Earth's atmosphere. The value of D/H in the water ice sampled from Enceladus so far is isotopically the same as values measured in comet nuclei originating from 3 different distances. This is consistent with the model of Owen and Robert (2010) requiring all ice in the outer solar system to have the same isotopic ratio, with the possible exception of Titan and the four large satellites of Jupiter. The recent discovery 22Ne on Titan and its relation to other noble gases adds one more clue to the manner of the atmosphere's origin.
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