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    The Bowen Fluorescence Mechanism in Planetary Nebulae and Seyfert Galaxy Nuclei

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    Author
    Weymann, R. J.
    Williams, R. E.
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    1969-01
    Keywords
    Planetary nebulae
    Galactic nuclei
    Seyfert galaxies
    Models
    
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    Publisher
    Steward Observatory, The University of Arizona (Tucson, Arizona)
    Rights
    Copyright © All Rights Reserved.
    Collection Information
    This title from the Steward Observatory Preprints collection is made available by the Steward Observatory Parker Library and the University Libraries, The University of Arizona. If you have questions about titles in this collection, please contact Parker Library librarian Betty Fridena, bfridena@as.arizona.edu.
    Abstract
    The efficiency of the Bowen fluorescence mechanism in models of planetary nebulae and Seyfert galaxy nuclei has been calculated by solving the equation of transfer for He II Ly -o( and the Bowen lines using the Feautrier method. The calculated efficiencies, which do not show significant differences between planetary nebulae and Seyfert galaxies, range from about 40% to 50% for realistic models. These values are somewhat higher than recent empirical determinations of Bowen conversion in planetary nebulae. Certain discrepancies between theoretical and observed line ratios are noted, however, which make the comparison with observation ambiguous. The efficiencies are shown to be rather insensitive to changes in various parameters. It is also noted that observations do not necessarily show that the Bowen lines are systematically weaker in Seyfert galaxy nuclei than in planetary nebulae.
    Citation
    APJ 157: 1201-1213 (Sep. 1969)
    Series/Report no.
    Preprints of the Steward Observatory #17
    Additional Links
    http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1969ApJ...157.1201W&db_key=AST&data_type=HTML&format=&high=3ed65e9cd005572
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