CORAVEL observations of time dependent turbulence in RR Lyrae are presented. Variation in the width of the mean velocity correlation function implies turbulent velocities that peak at 10 to 15 km/sec for a brief interval of phase near minimum radius. Comparison with a nonlinear pulsation model shows that these amplitudes of the turbulent velocity are expected near the hydrogen ionization zone, again only near minimum radius.
Presented at the 165th Am. Astrophys. Soc. Meeting
- Pub Date:
- Variable Stars;
- Time Dependence;