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The nature of dust grains in the comae of Comets černis and Bowell

✍ Scribed by F. Hoyle; N. C. Wickramasinghe; M. K. Wallis

Publisher
Springer Netherlands
Year
1985
Tongue
English
Weight
385 KB
Volume
33
Category
Article
ISSN
1573-0794

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✦ Synopsis

The currently available infrared data on scattered light from the dust comae of eernis and Bowel1 set stringent upper limits to the contribution of icy grains. For Comet Cernis the data IS consistent with only a 10% mass fraction of water-ice included within silicate-organic-carbon grains of scale radius 15 microns, while for Comet Bowel1 there is no evidence for any ice component. A coma of small (lo-100pm) organic grains containing a fraction of OH-bearing molecules that evaporate over weeks at 5 AU and leave an absorptive carbonaceous grain residue is the simplest model for Comet Bowell.

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