Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apjs...53..129k&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 53, Sept. 1983, p. 129-145.
Astronomy and Astrophysics
Astrophysics
20
Helium, Line Spectra, Lyman Alpha Radiation, Oxygen Spectra, Solar Spectra, Ultraviolet Spectra, Radiant Flux Density, Radiation Distribution, Spectral Line Width, Spectrum Analysis, Tables (Data)
Scientific paper
The solar O III spectrum above 900 A is analyzed, including several visible and infrared lines which are important in nebular studies. The dependence of the line intensities on the rate of photoexcitation by He Ly-alpha is determined, and the observability of these lines in the solar spectrum is studied. The impact approximation is employed to calculate the expected line widths of the stronger solar O III lines. The photoexciting field at 304 A calculated from the observed intensities of the O III lines below 900 A (Bhatia et al., 1982) is compared with the field predicted by a recent model (Avrett et al., 1976). It is shown that additional radiation trapping must be present beyond that given by this model.
Behring William E.
Bhatia Anand K.
Kastner Sidney O.
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