Does Gamma Equ have a magnetic cycle like the sun
Abstract
It is noted that investigations over the last three decades have provided observational evidence of a slowly varying effective magnetic field (with a change of sign in 1970/71) and a surface field exhibiting no remarkable changes. It is estimated that the period of the variation of the effective field, if it exists, is of the order of 100 years, making Gamma Equ an outstanding member in the group of magnetic stars. The question whether Gamma Equ can be explained by an oscillatory dynamo mechanism is considered. The investigation takes the Steenbeck-Krause (1969) dynamo model proposed for the sun. Even though fairly good agreement is possible, serious discrepancies persist, especially with respect to the thickness of the convective layer.
- Publication:
-
Liege International Astrophysical Colloquia
- Pub Date:
- 1981
- Bibcode:
- 1981LIACo..23..323K
- Keywords:
-
- Magnetic Stars;
- Solar Cycles;
- Solar Magnetic Field;
- Stellar Magnetic Fields;
- Dynamo Theory;
- Magnetic Field Configurations;
- Magnetic Flux;
- Periodic Variations;
- Stellar Models;
- Astrophysics