Computer Science – Sound
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993icar..101...71s&link_type=abstract
Icarus (ISSN 0019-1035), vol. 101, no. 1, p. 71-83.
Computer Science
Sound
8
Austin Comet, Carbon, Carbon Monoxide, Comet Nuclei, Emission Spectra, Oxygen Spectra, Rocket Sounding, Sulfur, Ultraviolet Spectroscopy, Fluorescence, Halley'S Comet, Lyman Beta Radiation, Photodissociation, Radiation Distribution, Solar Radiation, Comets, Austin, Ultraviolet, Spectroscopy, Emissions, Spectra, Carbon, Earth-Based Observations, Oxygen, Comparisons, Sulfur, Origin, Velocity, Carbon Monoxide, Parent Molecules, Production Rate, Distribution, Source, Fluorescence, Photodissociation, Water, Coma
Scientific paper
The spatial distributions of the brightest features in the far-UV spectrum of Comet Austin were measured, and it is found that they are generally similar to those found for Comet Halley during two rocket observations in 1986. As in Halley, the CO profile can be fit to a radial outflow profile for a source whose size is smaller than the instrumental spatial resolution. Neither the shape nor the magnitude of the extended atomic carbon profiles, however, can be satisfactorily explained by the photodissociation of CO. No evidence is found for an extended source of CO in the coma; thus, suggestions that the additional carbon can come directly from grains are difficult to accept since Austin is a low-dust comet. The presence of the O I 1356 A feature implies that there is a photoelectron excitation source in the coma. The measured O I 1304 A distribution is consistent with H2O being the dominant source of oxygen in the coma. The atomic sulfur profile matches that expected for a daughter product of relatively short-lived parents.
Feldman Paul D.
Martinez Mel E.
McCandliss Stephan R.
Sahnow David J.
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