Solar Rotation as Measured in EUV Chromospheric and Coronal Lines
Abstract
Active regions were followed across the disk on OSO 4 spectroheliograms in the Lyman continuum (LC) and in Mg X λ625. These observations indicate differential rotation with latitude, but not with height in the atmosphere. The measured equatorial sidereal rotation velocity is 14.7° ±0.2° per day in both chromospheric LC and coronal Mg X, where the quoted error is the standard deviation of a least-squares fit to the data.
- Publication:
-
Solar Physics
- Pub Date:
- September 1972
- DOI:
- 10.1007/BF00155100
- Bibcode:
- 1972SoPh...26....8S
- Keywords:
-
- Standard Deviation;
- Atmosphere;
- Active Region;
- Rotation Velocity;
- Differential Rotation