Discrepancies Between Calculated and Observed fe XVII and NI XIX Solar Coronal Lines
Abstract
We extend the 36-levels model atom Fe+16 of Loulergue and Nussbaumer (1973) to a 51-levels atom includingn=4 configuration. Our earlier conclusion that relative intensities among the Fe xvii lines are not sufficiently sensitive to variations in electron densities and electron temperature to deduce these parameters from observed intensity ratios still holds. Discrepancies between calculated and observed relative intensities in Fe xvii and Ni xix are attributed to blends or misidentifications.
- Publication:
-
Astrophysics and Space Science
- Pub Date:
- December 1975
- DOI:
- 10.1007/BF00647136
- Bibcode:
- 1975Ap&SS..38..365L
- Keywords:
-
- Iron;
- Nickel;
- Solar Corona;
- Solar Spectra;
- Atomic Energy Levels;
- Electron Density (Concentration);
- Line Spectra;
- Solar Physics