Solar p-mode frequency splittings.
Abstract
The author discusses here new measurements of solar p-mode frequency splittings, based on 100 days of solar Doppler observations from Big Bear Solar Observatory. The splittings were determined accurately for individual mode multiplets for the firs time, and show a dependence of splitting on radial order n as well as degree l. Two inversions, which infer the solar rotation rate as a function of depth and latitude from the measurements, are also discussed, and present the following picture of the sun's internal rotation: (1) The rotation rate in the convection zone is roughly independent of depth, showing a latitudinal differential rotation equal to that seen at the solar surface; (2) There is a relatively sharp transition zone at the base of the convection zone, where the differential rotation in the convection zone gives way to approximately solid body rotation in the radiative interior.
- Publication:
-
Seismology of the Sun and Sun-Like Stars
- Pub Date:
- December 1988
- Bibcode:
- 1988ESASP.286..131L
- Keywords:
-
- Helioseismology;
- P Waves;
- Solar Magnetic Field;
- Solar Oblateness;
- Solar Rotation;
- Asphericity;
- Depth;
- Inversions;
- Latitude;
- Solar Activity Effects;
- Solar Physics;
- Solar Oscillations: Solar Rotation;
- Differential Rotation: Sun