On an overshooting approach to the solar Li problem

To solve the solar Li-problem and to reduce the deviation between the sound speed of standard solar models and that infered from helioseismology, whic h is a persistent feature immediately below the convective envelope in most solar models, some additional mixing effect can be postulated. We investig ate, how a recently proposed parametric prescription of overshooting, which is based on two-dimensional hydrodynamical calculations, affects both the lithium content and the seismic properties of the models. While we conclude that for a certain choice of the free parameter the observed Lithium deple tion can be reproduced, we also show that this parameter is neither constan t within the Sun, nor during its evolution. Further, all models with oversh ooting agree less with the seismic model than the standard model.