Detection of (C-13)(C-12)H2 on Jupiter at 13 microns

Details Detection of (C-13)(C-12)H2 on Jupiter at 13 microns Detection of (C-13)(C-12)H2 on Jupiter at 13 microns

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...149l..10d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 149, no. 1, Aug. 1985, p. L10-L12.

Astronomy and Astrophysics

Astrophysics

19

Abundance, Acetylene, Carbon 13, Jupiter Atmosphere, Molecular Spectra, Planetary Composition, Carbon 12, Chemical Fractionation, Infrared Spectra, Jupiter, Composition, Spectra, Interferometry, Procedure, Emissions, Comparisons, Element Ratios, Intensity, Fractionation, Photochemistry

Scientific paper

The first detection of (C-13)(C-12)H2 of Jupiter is reported. The spectra were obtained at the IRTF in July 1984 with a Fabry-Perot high-resolution interferometer operating at 13 microns. Two lines of (C-13)(C-12)H2 were observed in emission at 753.46 and 758.03 per cm. A comparison with C2H2 indicates that the C2H2/(C-13)(C-12)H2 ratio is apparently lower than the value derived from a terrestrial C-12/C-13 ratio but it is still uncertain because of the strong intensity of C2H2 emission and uncertainties in the vertical profiles of C2H2. On the other hand, the assumption of a terrestrial ratio for C-12/C-13 indicates that fractionation produced by selective photochemical reactions may increase the (C-13)(C-12)H2/(C-12)H2 ratio above the expected ratio.

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