The solar O III spectrum. I - Photoexcitation of EUV lines by He II Lyman-alpha

Details The solar O III spectrum. I - Photoexcitation of EUV lines by He II Lyman-alpha The solar O III spectrum. I - Photoexcitation of EUV lines by He II Lyman-alpha

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...257..887b&link_type=abstract

Astrophysical Journal, Part 1, vol. 257, June 15, 1982, p. 887-895.

Physics

24

Atomic Excitations, Extreme Ultraviolet Radiation, Line Spectra, Lyman Alpha Radiation, Oxygen Spectra, Solar Spectra, Ultraviolet Spectra, Charge Exchange, Electron Energy, Helium, Solar Flares, Solar Physics, Temperature Dependence

Scientific paper

A detailed calculation of solar O III EUV line intensities is described, including the process of photoexcitation by He II Lyman-α. Excellent agreement with observed intensities is found for a photoexciting radiation field of intensity 9.8 × 10-8 ergs cm-2 s-1 sr-1 per Hz. The presence of some O III lines in flares is discussed. The process of charge exchange does not appear to be a significant factor in formation of the O III spectrum.

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