Amplitude Saturation in β Cephei Models - Preliminary Results

We present preliminary results concerning amplitude saturation in β Cephei models. Using a nonlinear approach we have investigated the amplitude limitation mechanism in β Cephei stars. In our approach radial modes have been treated as representative for all acoustic oscillations. We have studied pulsation properties of several models (7–20 M� , Z = 0.02, 0.015) using radiative Lagrangian hydrocodes (essentially those of Stellingwerf 1974, 1975). Nonlinear limit cycles (monoperiodic full-amplitude oscillations) have been calculated through Stellingwerf’s (1974) relaxation technique, which also provides information about limit cycle