On Bowen enhancement of the N III spectrum under solar and nebular conditions

Details On Bowen enhancement of the N III spectrum under solar and nebular conditions On Bowen enhancement of the N III spectrum under solar and nebular conditions

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...287..945k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 287, Dec. 15, 1984, p. 945-951.

Astronomy and Astrophysics

Astrophysics

9

Line Spectra, Planetary Nebulae, Solar Spectra, Stellar Spectrophotometry, Electron Density (Concentration), Electron Energy, Nitrogen

Scientific paper

Expected enhancement of the N III emission-line spectrum by the Bowen He II → O III → N III resonant photoexcitation process is computed using a six-configuration model. Preliminary comparisons with available solar and nebular observations indicate that the process may play only a small role, although photoexcitation quenching of the N III and O III far-infrared fine-structure lines is noted as a possible important mechanism. Some features are discussed in connection with the nebular emission at 1750 Å, which is suggested as an indicator of excitation class for planetary nebulae.

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