On themechanism of mode selection in delta Scuti stars.
Abstract
All well studied variables of the Delta Sct type are evolved objects whose theoretical frequency spectra for nonradial modes are very dense. The phenomenon of trapping in the acoustic cavity is investigated as a possible mode selection mechanism. It is shown that, in the relevant frequency range, a partial trapping occurs for the spherical harmonic degree l = 1 but it does not for l = 2 and 3. Consequences of this finding for the astroseismology are discussed.
- Publication:
-
Acta Astronomica
- Pub Date:
- 1990
- Bibcode:
- 1990AcA....40...19D
- Keywords:
-
- Scutum Constellation;
- Stellar Evolution;
- Stellar Oscillations;
- Variable Stars;
- Vibration Mode;
- Frequency Ranges;
- Modal Response;
- Spherical Harmonics;
- Astrophysics