ESTA-Task3 : First comparisons

Yveline Lebreton
Paris Observatory, France

Abstract. Task 3 is devoted to the comparison of stellar models taking into account microscopic diffusion of chemical elements resulting from pressure, temperature and concentration gradients, but excluding the effects of radiative forces. Models of 1.0, 1.2 and 1.3 solar masses have been calculated by the ESTA group with different stellar evolution codes up to the subgiant branch. I shall present first preliminar comparisons of those stellar models for particulr stages of the evolution.

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