Observations of solar oscillations of low and intermediate degree
Abstract
Measurements are presented of solar velocity oscillations with spherical harmonic degree 1-139 and angular order ~0. With an amplitude sensitivity of ~2 cm s -1, trapped acoustic wave modes of radial orders 2-26 are observed at frequencies between 1.7 and 5.5 mHz. The radial order identifications of low-degree modes previously inferred from theory are confirmed. Only marginal evidence of long-period, gravity-mode oscillations is found
- Publication:
-
Nature
- Pub Date:
- March 1983
- DOI:
- 10.1038/302024a0
- Bibcode:
- 1983Natur.302...24D
- Keywords:
-
- Astrometry;
- Solar Oscillations;
- Solar Velocity;
- Intermediate Frequencies;
- Low Frequencies;
- Velocity Measurement;
- Solar Physics