C2 imagery of the inner coma of Comet IRAS-Araki-Alcock

Details C2 imagery of the inner coma of Comet IRAS-Araki-Alcock C2 imagery of the inner coma of Comet IRAS-Araki-Alcock

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icar...63..339o&link_type=abstract

Icarus (ISSN 0019-1035), vol. 63, Sept. 1985, p. 339-346.

Astronomy and Astrophysics

Astronomy

14

Carbon, Comet Heads, Infrared Astronomy, Iras-Araki-Alcock Comet, Abundance, Diatomic Molecules, Molecular Spectra, Comets, Carbon, Comae, Iras-Araki-Alcock, Observations, Analysis, Abundance, Molecules, Diameter, Comet Nuclei, Emissions, Imagery, Volatiles, Ice, Crust, Periodic Comets, Models, Comparisons, Image Processing, Spectra, Flux

Scientific paper

The authors analyze observations of comet IRAS-Araki-Alcock taken on 1983 May 10 to determine the spatial molecular abundance of C2 in the inner coma via the Δυ = +1 Swan band sequence near 4690 Å; total molecular abundance for C2 is ≡6×1027 molecules across a projected linear diameter of ≡9700 km centered on the nucleus. These observations show a deficiency of C2 emission across a projected diameter of ≡2000 km centered on the peak of continuum emission. Comet imagery reveals a sunward-pointing coma suggestive of an outburst of subsurface volatile ices through a nonvolatile surface crust as predicted for periodic comets.

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