Mathematics – Probability
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242..615k&link_type=abstract
Astrophysical Journal, Part 1, vol. 242, Dec. 1, 1980, p. 615-627. NSF-supported research.
Mathematics
Probability
60
Atomic Spectra, Line Spectra, Planetary Nebulae, Resonance Fluorescence, Absorption Spectra, Astronomical Models, Helium, Nitrogen, Oxygen, Transition Probabilities, X Ray Sources
Scientific paper
A simplified theory of the Bowen resonance fluorescence mechanism is presented for both the pumping of the O III Bowen lines by He II 304 A and for the pumping of the N III Bowen lines by O III 374 A. Theoretical results, calculated on the basis of an escape probability approximation for resonance line transfer, obey simple scaling laws. The O III Bowen fluorescence yields calculated for a model planetary nebula agree well with those obtained in more rigorous calculations by Weymann and Williams and by Harrington. Intensities of O III and N III Bowen lines observed in the spectra of planetary nebulae and compact X-ray sources are discussed.
Kallman Tim
McCray Richard
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