## Studies on stellar rotation## I. The theoretical apsidal motion for evolved rotating stars
The quasi-spherical approximation, with some modifications, was
implemented in our stellar evolution code to take into account the
effect of rotation on the internal structure of the stars and, in
particular, on the apsidal motion constant. Three models with masses
2, 7 and 15 were used since they are
representative of the mass range where apsidal motion is detected in
binary stars. We adopted two limiting cases of angular momentum
redistribution: local conservation and rigid body rotation. It was
found that the influence of rotation on internal structure depends
strongly on the distortion of the configuration characterized by the
parameter = 2v
## Contents- 1. Introduction
- 2. The calculation of f
_{P}and f_{T} - 3. Discussion of the results and conclusions
- Acknowledgements
- References
© European Southern Observatory (ESO) 1999 Online publication: September 24, 1999 |