Influence of non-adiabatic temperature variations on line profile variations of slowly rotatingβCep stars and SPBs

In this study, we compute theoretical line proles of a non-radially pulsating star, taking the non- adiabatic eects into account. These non-adiabatic eects are especially important in the atmosphere, where the spectral lines are formed, and must be accounted for. In this rst paper of the series, we present a new treatment of the perturbed thermal and dynamical equations in the atmosphere of a pulsating star. We apply our formalism to the computation of non-adiabatic eigenfunctions in a typical Cephei star with low order p-modes and in a typical slowly pulsating B star with high-order g-modes.