Theoretical Neix line ratios compared to solar observations |
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| Authors: | F P Keenan S S Tayal A E Kingston |
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| Institution: | (1) Department of Applied Mathematics and Theoretical Physics, The Queens University of Belfast, BT7 1NN Belfast, Northern Ireland;(2) Present address: Department of Physics, D. J. College, Baraut, University of Meerut, India |
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| Abstract: | R-matrix calculations of the 11S - 23S and 11S - 23P electron excitation rates in He - like Cv, Ovii, and Mgxi by Kingston and Tayal are used to interpolate results for Neix. Adoption of these in emission line strength calculations leads to values for the density-sensitiveR ratio very similar to those of Pradhanet al. and Wolfsonet al., although the temperature-sensitiveG ratios are approximately 10 to 20 % lower than those deduced by these authors. However the present theoretical value ofG at the temperature of maximum Neix emission,G(T
m) = 0.82, is in excellent agreement with those observed by the SMM and P78-1 satellites for the 1980, November5 flare (G = 0.83 ± 0.01) and nonflaring active regions (G = 0.80 ± 0.05), respectively. |
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