Computer Science
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250c.353c&link_type=abstract
In ESA, Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 3: Posters p 353-358 (SEE N87-26714
Computer Science
Abundance, Chemical Composition, Cyano Compounds, Halley'S Comet, Hydrocarbons, Comet Nuclei, Cometary Atmospheres, Density Distribution, Giotto Mission, Ice, Particle Laden Jets, Particle Mass, Silicates
Scientific paper
Based on chemical signatures measured by the PIA experiment during the Giotto flyby of comet Halley, a number of particle classifications have been designated. In addition to silicate-like grains and particles of mixed (cosmic) composition, there appear to be several light-element rich populations, including the CHON, (H,C), (H,C,O), and (H,C,N) particle types. In some cases, these compositional classes are further distinguished by differences in mass distributions, a density indicator, and variations in relative abundance within the coma. These particle populations are evidence for chemical heterogeneity in the surface of the cometary nucleus. Some particles found mainly in the inner coma may be volatile icy grains. Most of the N of the comet may be found in up to three different populations of grains; one or more of these may be responsible for the observation of cyanojets.
Clark Benton
Kissel Jochen
Mason Larry W.
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