The Tropospheric Abundance of H2 on Titan from the Cassini CIRS Investigation

Details The Tropospheric Abundance of H2 on Titan from the Cassini CIRS Investigation The Tropospheric Abundance of H2 on Titan from the Cassini CIRS Investigation

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.5605c&link_type=abstract

American Astronomical Society, DPS meeting #39, #56.05; Bulletin of the American Astronomical Society, Vol. 39, p.529

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We have derived the mole fraction of H2 in the troposphere of Titan from an analysis of the H2-N2 dimer S0(0) rotational transition seen near 350 cm-1 in spectra recorded by the Composite Infra-Red Spectrometer (CIRS) on the Cassini spacecraft. We find a value f(H2) = 9.6 ± 2.4 x 10-4 which coincides with that obtained previously from a similar analysis applied to the Voyager IRIS data set (Courtin et al., 1995, Icarus 114, 144-162). This improved determination, with an error bar half that of the IRIS-based value, may help better constrain photochemical models of Titan.

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