Spectroscopic analysis of prominence emissions
Abstract
Prominence spectra of fairly high spatial resolution of 3arcsec to 4arcsec are analysed. The total optical thickness of the Ca+K emission is determined from the self-absorption factor, using the true upper level population obtained from the Ca+8542 emission. Turbulence values determined from the widths of optically thin lines show fair agreement with microturbulence values obtained from the emission relation of the optically thick Ca+H and K lines. Variations of the emission ratio E8542/Eβ in prominences may be related to different gas pressures.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 1988
- Bibcode:
- 1988A&A...197..274B
- Keywords:
-
- Optical Thickness;
- Solar Prominences;
- Solar Spectra;
- Calcium;
- Emission Spectra;
- H Beta Line;
- Spatial Resolution;
- Solar Physics