New constraints on the chemical evolution of the solar neighbourhood and [...] (L. Casagrande)

Vol. 530In section 5. Galactic structure, stellar clusters and populations

New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s)

The authors carried out a full scale reanalysis of the more than 16 000 stars of the Geneva-Copenhagen spectroscopic survey, which is the largest kinematically unbiased sample of Milky Way disk stars in the Solar Neighborhood. They have improved both the accuracy of the stellar temperature scale and the homogeneity of all the stellar parameters, and estimated the alpha abundances based upon Strömgren photometry. This has allowed a more precise determination of the ages and metallicities of this large sample of disk stars and enabled the authors to make a distinction between the thin and thick disk stellar populations in the Milky Way, leading to better understanding of the dominant physical processes in its formation and evolution.