The Equatorial Rotation Rate of the Supergranulation Cells
Abstract
The equatorial rotation rate of the supergranulation cells has been observed to be 14.72±0.07°/day. Velocity patterns observed at different times are cross-correlated to derive the rotation rate. The observed rate is 3% faster than recent observations of the surface rotation rate by Doppler shifts. The difference between the cell rate and surface rate is consistent with a model of the supergranular convection in which angular momentum per unit mass is conserved in the radial flow (Foukal, 1977).
- Publication:
-
Solar Physics
- Pub Date:
- June 1980
- DOI:
- 10.1007/BF00150578
- Bibcode:
- 1980SoPh...66..213D
- Keywords:
-
- Equatorial Atmosphere;
- Solar Granulation;
- Solar Rotation;
- Velocity Distribution;
- Angular Momentum;
- Cross Correlation;
- Radial Flow;
- Solar Physics;
- Spectroheliographs;
- Solar Physics;
- Convection;
- Angular Momentum;
- Unit Mass;
- Rotation Rate;
- Doppler Shift