Selected spectra from the SOLEX B X-ray spectrometers aboard the P78-1 satellite have been analyzed in order to compare Fe XVII line flux ratios with theory. The spectra were chosen to cover a wide range of activity from quiescent active regions to large flares. For purposes of comparison with theory, a temperature scale based on a ratio of Fe XVIII to Fe XVII line fluxes has been derived. It is found that line ratios involving states with 3s and 3d electrons disagree with recent theoretical predictions. Effects of resonance scattering in the corona are calculated and compared with the observed 2p6 1S0-2p53d 1P1 line flux.
No takes yet. Share an insight, caveat, or question.
Rugge et al. (1985) studied this question.