Stellar clusters: small high-resolution spectroscopic surveys have their say

by Dr Angela Bragaglia (INAF OAS Bologna)

Friday 19 Sept 2025, 10:30 → 11:30 Europe/Stockholm

FC61 (AlbaNova Main Building)

Stellar clusters, besides being very interesting objects per se, are also very important tools to study how the Galaxy formed and evolved to the present status. Large spectroscopic surveys are becoming the dominant way of obtaining observations; however, there is still room for smaller scale programs. I will try to present a balanced view of pros and cons of large versus small  projects, in particular for open clusters. I will present results obtained by the SPA-Open Clusters team (SPA stands for 'Stellar Population Astrophysics' and is a Large Programme at the Italian Telescopio Nazionale Galileo) and by several follow-up projects, employing the combination of GIANO and HARPS-N, the near-IR and optical high=resolution spectrographs. We targeted both giant stars, when available, and main sequence stars and we measured stellar parameters, Vrot, activity indices, individual reddening (and detailed abundances for those stars in young clusters which do not rotate too  fast). I will touch upon measuring clusters of different ages, clusters in the Radcliffe Wave, our study of fluorine and phosphorous abundance and work in progress.