Oscillatory periods in the sun and theoretical models with or without mixing.
Abstract
Summary. Theoretical eigenvalues corresponding to periods less than one hour are presented for a standard solar model and for models of about the solar age which are undergoing a thermal pulse following a fast mixing. The two sets of eigenvalues differ very little, the differences being probably less than the accuracy of Hill's observations, except that the standard solar model presents a quadrupolar oscillation with a 43 min period while the mixed models do not. This period does not seem to be present in Hill's observations. Attempts to observe that particular period are important since the presence or absence of this 43 min period and its possible identification with a quadrupolar oscillation would be a strong argument in favour of one of the two types of solar models studied here. Key words: sun solar neutrinos stellar pulsation
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- December 1975
- Bibcode:
- 1975A&A....45...15S
- Keywords:
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- Astronomical Models;
- Eigenvalues;
- Mixing;
- Periodic Variations;
- Solar Cycles;
- Vibration Mode;
- Quadrupoles;
- Solar Physics;
- Solar Radiation;
- Stable Oscillations;
- Stellar Evolution;
- Solar Physics