Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...74..133c&link_type=abstract
(Conference on the Origin and Evolution of Planetary and Satellite Atmospheres, Tucson, AZ, Mar. 10-14, 1987) Icarus (ISSN 0019-
Astronomy and Astrophysics
Astronomy
13
Iue, Neptune (Planet), Planetary Composition, Ultraviolet Spectroscopy, Uranus (Planet), Abundance, Acetylene, Astronomical Models, Infrared Spectra, Planets, Giant Planets, Neptune, Uranus, Satellite Observations, Models, Iue Satellite, Infrared, Wavelengths, Abundance, Acetylene, Comparisons, Mixing, Ultraviolet, Spacecraft Observations, Voyager Missions, Spectra, Altitude, Albedo, Optical Properties, Models
Scientific paper
New observations of Neptune and improved data on Uranus below 2000 Å, obtained with the International Ultraviolet Explorer satellite, are presented. For Uranus, there is excellent agreement between the derived abundance of acetylene (C2H2) from the ultraviolet and from independent infrared data. A mixing ratio of 1×10-8 is found. For Neptune, the derived C2H2 abundances from IUE and from infrared spectra are different by orders of magnitude. Since the abundance derived from the infrared is incompatible with the new ultraviolet data, it appears that some aspects of the infrared modeling require modification.
Caldwell J. Jr. J.
Fricke Karl-Heinrich
Wagener Richard
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