Energetics of coronal hole expansion
Abstract
Based on the assumption of the undamped propagation of Alfven waves between 2 and 5 RS, the possible range of Alfven wave energy flux density at the base of a polar coronal hole has been deduced. It is concluded that extended heating above 2 RS is needed to maintain the temperature maximum above 2 RS and to supply energy for the formation of high-speed wind streams. The energy contribution of extended heating to high-speed wind streams might be greater than that of Alfven waves by direct momentum addition.
- Publication:
-
Journal of Geophysical Research
- Pub Date:
- September 1981
- DOI:
- 10.1029/JA086iA09p07480
- Bibcode:
- 1981JGR....86.7480Z
- Keywords:
-
- Coronal Holes;
- Kinetic Energy;
- Magnetohydrodynamic Waves;
- Plasma Dynamics;
- Solar Wind Velocity;
- Energy Transfer;
- Plasma Heating;
- Radiant Flux Density;
- Solar Physics;
- Temperature Profiles