Physics
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994soph..149..137k&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 149, no. 1, p. 137-142
Physics
6
Aluminum, Atomic Energy Levels, Atomic Excitations, Electron Density (Concentration), Electron Impact, Emission Spectra, Line Spectra, Solar Flares, Stellar Models, Electron Energy, Skylab Program, Spectrographs
Scientific paper
Theoretical electron-density-sensitive emission line ratios in B-like Al IX are presented for R = I(385.01 A)/I(392.42 A). A comparison of these with high spectral resolution solar flare data, obtained with the S082A slitless spectrograph on board Skylab, reveals agreement between theory and observation for those spectra that were observed during the later stages of the flares. These results provide experimental support for the accuracy of the line-ratio calculations, and also resolves discrepancies found previously when the theoretical results were compared with solar observations from the S-055 instrument on board Skylab. However, the agreement between theory and observation for a spectrum obtained during the early stages of a flare is very poor, which probably indicates that the 392.42 A line is blended with a transition arising from a species formed at a very high electron temperature.
Bowden D. A.
Conlon E. S.
Dwidvedi B. N.
Keenan Francis P.
Widing Kenneth G.
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