Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...301..825l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 301, Feb. 15, 1986, p. 825-833.
Astronomy and Astrophysics
Astrophysics
27
Astronomical Spectroscopy, Charge Exchange, Fluorescence, Oxygen Spectra, Planetary Nebulae, Ultraviolet Spectra, Atomic Spectra, Line Spectra, Lyman Spectra
Scientific paper
Measurements of Bowen fluoresecent lines in 17 planetary nebulae are presented and the relative line strength is composed with theory. There is generally good agreement with the line intensities expected by Saraph and Seaton (1980). The largest deviation from theory is in the O III I(3429A/I3444A) ratio, which is consistently lower than predicted. Certain lines are enhanced by charge transfer, and the predicted contribution has been calculated. The results reported here support the charge transfer rate published in 1982 by Dalgarno and Sternberg. The Bowen efficiency is calculated for each of the planetary nebulae considered; the range of values indicates differences between the nebulae. Bipolar and double-ringed planetaries whose central stars display continuous spectra are found to have the lowest efficiencies.
Aller Lawrence H.
Likkel Lauren
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