Radial migration and the properties of the MW disk

N. Prantzos and E. Athanassoula (AIP, Paris, France)

I will present the results of a recent study on the impact of radial migration of stars on the chemical evolution of the Milky Way disk. In particular, assuming that the thick disk is the oldest (>9 Gyr) part of the disk, we find that the adopted radial migration scheme can reproduce quantitatively the main local properties of the thin and thick disk: metallicity distributions, "two-branch" behaviour in the O/Fe vs Fe/H relation, local surface densities of stars. We also show how, in this framework, current and forthcoming spectroscopic observations can constrain the nucleosynthesis yields of massive stars for the metallicity range of 0.1 Zsun to 2-3 Zsun.