Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989soph..122....7k&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 122, no. 1, 1989, p. 7-12. Research supported by SERC.
Astronomy and Astrophysics
Astronomy
6
Far Ultraviolet Radiation, Line Spectra, Oxygen Spectra, Solar Spectra, Skylab Program, Spaceborne Astronomy
Scientific paper
Relative level populations in O III, determined using R-matrix calculations of electron-impact excitation rates, are used to derive the theoretical emission line ratios R1 = I(525.80 A)/I(599.62 A), R2 = I(507.41 A)/I(599.62 A), R3 = I(507.71 A)/I(599.62 A), and R4 =I(508.18 A)/I(599.62 A). Electron temperatures deduced from the observed values of these ratios for several solar features, obtained with the NRL S082A slitless spectrograph on Skylab, are in good agreement, and also compare favorably with that of maximum O III fractional abundance in ionization equilibrium, log Tmax = 4.96. These results provide experimental support for the accuracy of the atomic data adopted in the line-ratio calculations.
Aggarwal Kanti M.
Keenan Francis P.
McCann S. M.
Widing Kenneth G.
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