Starlight excitation of permitted lines in the Orion Nebula

Details Starlight excitation of permitted lines in the Orion Nebula Starlight excitation of permitted lines in the Orion Nebula

Mar 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...196..465g&link_type=abstract

Astrophysical Journal, vol. 196, Mar. 1, 1975, pt. 1, p. 465-472.

Other

80

Astronomical Models, Line Spectra, Oxygen Spectra, Planetary Nebulae, Electron Transitions, Fluorescence, Gas Ionization, Lyman Spectra, Recombination Reactions, Spectral Line Width

Scientific paper

From an idealized model of the Orion Nebula and from an analysis of line ratios it is shown that direct starlight excitation of the permitted O I lines dominates over recombination and Lyman-line fluorescence. The line strengths predicted by this mechanism agree reasonably well with those observed in the Orion Nebula. The application of direct starlight excitation to other ions is also discussed.

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