Rotation and magnetic fields in the Sun.
Abstract
Stellar magnetic fields exert torques which alter the distribution of angular momentum in a star. In the radiative interior of the sun, these torques tend to enforce uniform rotation and the existence of a rapidly rotating core would imply a poloidal field of less than 0.01 G. In the convective envelope, magnetic fields generated by dynamo action produce torques which lead to torsional oscillations. A simple nonlinear model allows both multiply periodic and chaotic behavior. This system demonstrates that both aperiodic magnetic cycles and the irregular modulation responsible for grand minima can be regarded as examples of deterministic chaos. This picture is consistent with the C-14 record but implies that the multiply periodic lamination of some Precambrian varves is not associated with the solar cycle.
- Publication:
-
Physical Processes in Comets, Stars and Active Galaxies
- Pub Date:
- 1987
- Bibcode:
- 1987ppcs.work...46W
- Keywords:
-
- Solar Magnetic Field;
- Solar Rotation;
- Angular Momentum;
- Chaos;
- Solar Activity Effects;
- Solar Interior;
- Solar Oscillations;
- Stellar Cores;
- Torque;
- Solar Physics;
- Dynamo Theory:Sun;
- Solar Activity Cycles;
- Solar Magnetic Fields;
- Solar Rotation;
- Sun:Dynamo Theory