Observations of the horizontal velocity
✍
N. R. Sheeley
📂
Article
📅
1972
🏛
Springer
🌐
English
⚖ 676 KB
During the summer and fall of 1971, Doppler spectroheliograms were obtained for several sunspots located near the solar limb. These observations confirm a previous result based on the study of only a few sunspots that in the plage-free photosphere surrounding sunspots the spatiallyaveraged, horizont