A study of the upper atmosphere of Uranus using the IUE

Details A study of the upper atmosphere of Uranus using the IUE A study of the upper atmosphere of Uranus using the IUE

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...162..317e&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 162, no. 1-2, July 1986, p. 317-322.

Astronomy and Astrophysics

Astronomy

19

Ultraviolet Astronomy, Uranus Atmosphere, Abundance, Acetylene, Atmospheric Composition, Iue, Molecular Spectra, Upper Atmosphere

Scientific paper

The 1750 Å band of C2H2 has been detected in an IUE spectrum of Uranus recorded in 1980. The derived C2H2 column density is 6.8±3.4×1016cm-2. Eddy diffusion coefficients of 104cm2s-1 or smaller at the homopause result in an abundance of photochemically produced C2H2 which is too low compared to the measurements. On the other hand, the results with K = 105 or 106cm-2s-1 are virtually undistinguishable from each other but give acceptable agreement with the data. The observed C2H2 is controlled by photochemistry and not by saturation, which takes place at lower altitudes.

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