An observational search for large scale organization of five-minute oscillations on the sun.
Abstract
The large-scale solar velocity field has been measured over an aperture of radius 0.8 R⊙ on 121 days between April and September, 1976. Measurements are made in the line FeI 5123.730 Å, employing a velocity subtraction technique similar to that of Severny et al. (1976). Comparisons of the amplitude and frequency of the five-minute resonant oscillation with the geomagnetic C9 index and magnetic sector boundaries show no evidence of any relationship between the oscillations and coronal holes or sector structure.
- Publication:
-
Solar Physics
- Pub Date:
- March 1978
- DOI:
- 10.1007/BF00152038
- Bibcode:
- 1978SoPh...57....3D
- Keywords:
-
- Solar Activity;
- Solar Corona;
- Solar Magnetic Field;
- Solar Spectra;
- Velocity Distribution;
- Geomagnetism;
- Oscillations;
- Periodic Variations;
- Solar Activity Effects;
- Solar Atmosphere;
- Solar Physics;
- Velocity Field;
- Coronal Hole;
- Sector Structure;
- Sector Boundary;
- Magnetic Sector;
- Oscillations:Solar Corona;
- Oscillations:Solar Photosphere;
- Solar Corona: Large-Scale Structure