Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...329..951d&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 329, June 15, 1988, p. 951-955.
Astronomy and Astrophysics
Astrophysics
30
Abundance, Deuterium, Methyl Alcohol, Satellite Atmospheres, Solar System, Titan, Line Spectra, Signal To Noise Ratios, Stoichiometry, Saturn, Satellites, Titan, Methane, Spectra, Spectrometry, Comparisons, Earth-Based Observations, Deuterium, Abundance, Atmosphere, Models, Element Ratios, Hypotheses, Hyrogen, Enrichment
Scientific paper
The 3ν2 band of CH3D has been detected in spectra of Titan recorded at 1.6 μm with the Fourier transform spectrometer at the 4 m telescope of the Kitt Peak National Observatory. The authors have obtained a value of the CH3D/CH4 mixing ratio of 6.6 (+6.6, -3.3)×10-4 from a comparison between the observed Titan spectra and synthetic spectra. It corresponds to D/H of 1.65 (+1.65, -0.8)×10-4, nominally 8 times higher than the most commonly accepted value for the protosolar D/H = 2×10-5. The value found on Titan for D/H in methane is comparable to the D/H ratio measured in terrestrial H2O.
Chauville Jacques
de Bergh Catherine
Lutz Barry L.
Owen Theodore
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