COMPARISON BETWEEN STANDARD EVOLUTION MODELS FOR HIGH AMPLITUDE DELTA-SCT STARS

Recent uvby-BETA observations of high amplitude delta Sct stars obtained at Sierra Nevada (Spain) and La Silla (Chile) observatories are compared with standard evolution models. We find very good agreement between Claret et al. model's (1989) and those from Vanden Berg (1985). However, a systematic effect on the derived masses is found if we use the Hejlesen's results as indicated by previous work by Anderson et al. (1984). The results derived from the evolution models are compared with those derived from pulsation theory. A good agreement is found.