Light and radial velocity variations in a nonradially oscillating star.
Abstract
Formulae for light and radial velocity variations are derived in terms of solution of the linear oscillations equations. A possibility of observational identification of the oscillation mode is discussed. It is shown that nonradial oscillations cannot be distinguished from the radial ones on the basis of the amplitude ratios of radial velocity and light variations. Instead, the use of the Baade-Weselink method is recommended. For stars with known radii, this method permits to determine the spherical harmonic order of the oscillation.
- Publication:
-
Acta Astronomica
- Pub Date:
- 1977
- Bibcode:
- 1977AcA....27..203D
- Keywords:
-
- Limb Darkening;
- Radial Velocity;
- Spherical Harmonics;
- Variable Stars;
- Legendre Functions;
- Stellar Envelopes;
- Stellar Mass;
- Stellar Models;
- Astrophysics