Narrowband Filter Photometry of Five Comets

Eighty-five photometric scans of the inner comae of Comets P/Giacobini-Zinner, Sorrells, Bradfield, Furuyama, and P/Borrelly were obtained from 1985–1988. These comets were each observed on at least one night during this period of time, using narrowband filters to isolate C 2, C 3, and CN emission a...

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Bibliographic Details
Published in:Icarus (New York, N.Y. 1962) N.Y. 1962), 2000-06, Vol.145 (2), p.591-600
Main Authors: Ellis, T.A., Neff, J.S.
Format: Article
Language:English
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Summary:Eighty-five photometric scans of the inner comae of Comets P/Giacobini-Zinner, Sorrells, Bradfield, Furuyama, and P/Borrelly were obtained from 1985–1988. These comets were each observed on at least one night during this period of time, using narrowband filters to isolate C 2, C 3, and CN emission and the blue and UV continuum. Molecular column densities and production rates were calculated for Bradfield, Furuyama, and P/Borrelly. For Comet Bradfield the post-perihelion production rates were plotted against the Sun–comet distance ( r) and were found to vary as r −1.9 (C 2), r −1.6 (C 3), r −1.9 (CN), and r −1.4 (dust). In addition, the production rate ratios were shown to have no significant dependence upon activity or Sun–comet distance.
ISSN:0019-1035
1090-2643
DOI:10.1006/icar.2000.6345