

Set of isochrones Standard In the stellar evolution calculations, the boundary of convective zones is determined using the canonical Schwarzschild's criterion. Overshooting In this case a mixed zone is added beyond the Schwarzschild boundary. This is the overshooting zone. The existence of such a zone is still a subject od debate (see the literature) but this hypothesis is supported by several observational evidence. Standard and nonstandard models have been computed with a scaledsolar mixture and an alphaenhanced mixture. For each of the two mixtures, models with two values of the Reimers mass loss parameter are available (eta=0.2 and 0.4). 