GAIA STELLAR CHEMICAL ABUNDANCES AND GALACTIC ARCHAEOLOGY

摘要

The chemical information derived from the Gaia data will be crucial for tagging stars in the Galaxy and thus for disentangling the Galactic history. The derivation of detailed chemical abundances using the Gaia tools (RVS, Astrom-etry, MBP) is examined exploring its impact on Galactic evolutionary models. We look into the difficulties for obtaining an accurate diagnostic of the Galactic chemical history, like NLTE effects, chromospheric activity and the consequences of the element diffusion in stellar interiors. Finally, we point out some open questions on the Galactic evolution that Gaia abundances can precisely help to answer.