Other
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...254..371d&link_type=abstract
Astrophysical Journal, Part 1, vol. 254, Mar. 1, 1982, p. 371-375. NASA-supported research.
Other
19
Emission Spectra, Lyman Spectra, Oxygen Spectra, Solar Atmosphere, Solar Spectra, Ultraviolet Absorption, Calibrating, Opacity, Resonance Lines
Scientific paper
Lyman continuum absorption shortward of 912 A in the quiet sun solar transition region is investigated by combining spectra obtained from the Apollo Telescope Mount experiments on Skylab. The most recent atomic data are used to compute line intensities for lines that fall on both sides of the Lyman limit. Lines of O III, O IV, O V, and S IV are considered. The computed intensity ratios of most lines from O IV, O V, and S IV agree with the experimental ratios to within a factor of 2. However, the discrepancies show no apparent wavelength dependence. From this fact, it is concluded that at least part of the discrepancy between theory and observation for lines of these ions can be accounted for by uncertainties in instrumental calibration and atomic data. However, difficulties remain in reconciling observation and theory, particularly for lines of O III, and one line of S IV. The other recent results of Schmahl and Orrall (1979) are also discussed in terms of newer atomic data.
Doschek George A.
Feldman Uri
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