Oscillations of giants and supergiants.
Abstract
It is shown that nonradial oscillations of giant and supergiant stars may be rapidly excited by a mechanism operating in outer layers. The excited modes have a negligible amplitude in the deep interior and with the use of proper boundary conditions they may be studied for unfitted envelope models. It is further shown that the vibrational instability due to radiative transfer in semiconvective zones located in deep interior results in local progressive wave excitation. The latter effect has no direct relevance to oscillations in outer layers
- Publication:
-
Acta Astronomica
- Pub Date:
- 1977
- Bibcode:
- 1977AcA....27...95D
- Keywords:
-
- Dynamic Stability;
- Giant Stars;
- Stellar Envelopes;
- Stellar Models;
- Supergiant Stars;
- Atmospheric Turbulence;
- Mathematical Models;
- Oscillations;
- Turbulence Effects;
- Vibration Mode;
- Astrophysics