BET CEP stars as non-radial oscillators. II. Multiperiodic variables SIG SCO and nu Eri.
Abstract
Observed radial velocity and line profile variations for Sigma Sco and Nu Eri are interpreted in terms of nonradial oscillations. In Sigma Sco the excited modes are (2, -1) and (3, 0); the star is seen at an inclination angle of about 50 deg. In Nu Eri the excited modes are (2, 0), (1, +1), (1, 0), and (1, -1); the star is a slow rotator seen nearly equator-on. The importance of mode identification for the correct interpretation of the observed 2K/delta m ratio is examined; the mode identification appears to indicate that there is no preference for any particular l-value.
- Publication:
-
Acta Astronomica
- Pub Date:
- 1980
- Bibcode:
- 1980AcA....30..219K
- Keywords:
-
- Cepheid Variables;
- Radial Velocity;
- Stellar Motions;
- Stellar Oscillations;
- Stellar Rotation;
- Error Analysis;
- Linear Equations;
- Modal Response;
- Velocity Distribution;
- Astrophysics