On the rotation of stars.
Abstract
It is shown that Sobolev's (1967) method for determining stellar rotation velocities on the basis of spectral line profiles is not sufficiently correct. Rotation velocities obtained from absorption line profiles are too high as a result of the failure to take into account the effect of macroturbulence. This paper presents another method (called the g-method) for determining stellar rotation velocity, which is based on differences between observed and dynamic gravitational accelerations. Velocities obtained with the g-method confirm all the fundamental conclusions of previous studies of stellar rotation. Results of calculations, are presented for stars of luminosity classes V, IV, III, Ia, and Ib.
- Publication:
-
Trudy Kazanskaia Gorodkoj Astronomicheskoj Observatorii
- Pub Date:
- 1980
- Bibcode:
- 1980TrKaz..45....3M
- Keywords:
-
- Astrophysics;
- Stellar Gravitation;
- Stellar Rotation;
- Absorption Spectra;
- Acceleration (Physics);
- Angular Velocity;
- Critical Velocity;
- Gravitational Effects;
- Spectral Line Width;
- Stellar Atmospheres;
- Stellar Luminosity;
- Stellar Spectra;
- Turbulence;
- Velocity Distribution;
- Astrophysics;
- Stellar Rotation