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Spectrophotometry of comets Giacobini-Zinner and Halley

Tegler, Stephen C. and O'dell, C. R. (1987) Spectrophotometry of comets Giacobini-Zinner and Halley. The Astrophysical Journal, 317. pp. 987-991. ISSN 1538-4357


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Publisher’s or external URL: http://dx.doi.org/10.1086/165346


Optical window spectrophotometry was performed on comets Giacobini-Zinner and Halley over the interval 300-1000 nm. Band and band-sequence fluxes were obtained for the brightest features of OH, CN, NH, and C2, special care having been given to determinations of extinction, instrumental sensitivities, and corrections for Fraunhofer lines. C2 Swan band-sequence flux ratios were determined with unprecedented accuracy and compared with the predictions of the detailed equilibrium models of Krishna Swamy et al. (1977, 1979, 1981, and 1987). It is found that these band sequences do not agree with the predictions, which calls into question the assumptions made in deriving the model, namely resonance fluorescence statistical equilibrium. Suggestions are made as to how to resolve this discrepancy.

Item Type: Article
Publisher’s Statement: © 1987 The American Astronomical Society. Published in the Astrophysical Journal.
ID number or DOI: 10.1086/165346
Keywords: Astronomical Photometry, Giacobini-Zinner Comet, Halley's Comet, Molecular Interactions, Visible Spectrum, Abundance, Fraunhofer Lines, Ultraviolet Spectra
Subjects: Q Science > QB Astronomy
NAU Depositing Author Academic Status: Faculty/Staff
Department/Unit: College of Engineering, Forestry, and Natural Science > Physics and Astronomy
Date Deposited: 22 Dec 2015 19:59
URI: http://openknowledge.nau.edu/id/eprint/1852

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