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C2 imagery of the inner coma of Comet IRAS-Araki-Alcock (1985)

Brown, L. W. ; Oliversen, R. J. ; Hollis, J. M.

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Publication Date: 2011-08-19

Description: May 10, 1983 observations of the comet IRAS-Araki-Alcock are analyzed to determine the spatial molecular abundance of C2 in the inner coma, via the Delta-v = +1 Swan band sequence near 4690 A. The observations indicate a deficiency of C2 emission across a projected diameter of about 2000 km that is centered on the peak of continuum emission. Comet imagery indicates a sunward-pointing coma that suggests an outburst of subsurface volatile ices through a nonvolatile surface crust, as predicted for periodic comets. These results are discussed in the framework of instrumental and observational constraints.

Keywords: ASTRONOMY

Type: Icarus (ISSN 0019-1035); 63; 339-346

Format: text

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