Solar Activity and the Yellow Coronal Line 5694A
Abstract
An examination of the coronal and prominence emission spectrograms containing all known cases of the yellow coronal emission line (5694 A.) taken at the Climax and Sacramento Peak Observatories revealed that prominences accompanied each yellow-line emission and that about 80% of these prominences showed abnormal sightline velocities. It also showed that in a large number of cases the red (6374) and green (5303) coronal lines had maxima at the position at which the yellow line was observed. Doppler shifts were present in the red coronal line in 10% of the cases examined and a small number of Doppler shifts in the green and yellow line were also seen. Except for these cases of Doppler shifts in coronal lines, the phenomenon is practically absent in Climax and Sacramento Peak spectra.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 10, 1952
- Accession Number
- AD0740707
Entities
People
- Frederick P. Dolder
Organizations
- High Altitude Observatory