Comparison of observed Ca xix and Ca xviii relative line intensities with current theory
Abstract
A comparison is made between Ca XIX and Ca XVIII line ratios observed in solar flares with the Bent Crystal Spectrometer (BCS) on the Solar Maximum Mission (SMM) satellite and currently available atomic data. Close agreement is found with the excitation rates recently published by Pradhan et al. (1981). The observations show little dependence of line ratios on electron temperature, supporting a further conclusion that cascade contributions to the 23P and 23S levels are not significant.
- Publication:
-
Solar Physics
- Pub Date:
- May 1982
- DOI:
- 10.1007/BF00151148
- Bibcode:
- 1982SoPh...78..125J
- Keywords:
-
- Atomic Excitations;
- Calcium;
- Line Spectra;
- Solar Flares;
- Solar Spectra;
- Electron Energy;
- Helium;
- Lithium;
- Solar Maximum Mission;
- Temperature Dependence;
- Transition Probabilities;
- Solar Physics;
- Flare;
- Close Agreement;
- Electron Temperature;
- Solar Flare;
- Line Intensity