Line Asymmetry and the Activity Cycle
Abstract
Moderate strength Fraunhofer lines in spatially averaged spectra display a line asymmetry arising from the convective motions of surface granulation. Several workers have shown that line asymmetry diminishes in magnetic regions, implying an interaction between surface magnetism and granular convection. The author reviews the evidence that the 11 year activity cycle modulates line asymmetry when the sun is viewed as a star.
- Publication:
-
The Role of Fine-Scale Magnetic Fields on the Structure of the Solar Atmosphere
- Pub Date:
- 1987
- Bibcode:
- 1987rfsm.conf...14L