view Abstract Citations (20) References (25) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Ultraviolet continuum absorption /less than about 1000 A/ above the quiet sun transition region Doschek, G. A. ; Feldman, U. Abstract 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. Publication: The Astrophysical Journal Pub Date: March 1982 DOI: 10.1086/159741 Bibcode: 1982ApJ...254..371D Keywords: Emission Spectra; Lyman Spectra; Oxygen Spectra; Solar Atmosphere; Solar Spectra; Ultraviolet Absorption; Calibrating; Opacity; Resonance Lines; Solar Physics full text sources ADS |