Nonradial nonadiabatic stellar pulsations:: A numerical method and its application to a β Cephei model

A new general method for the computation of nonradial nonadiabatic oscillations of a given stellar model is presented for a linear approximation. A simple and useful modelling of the atmosphere is included, allowing to obtain credible values for the eigenfunctions in the atmosphere. Some of the results obtained for a 10 M. model are shown as:an illustration. Our study opens the way to different applications. Better theoretical line-profile variations could be obtained from our method. allowing a more detailed comparison with observations. More generally, our study is relevant for asteroseismology, giving a way for a better knowledge of stellar interiors.