The recently rediscovered open cluster Stock2, located roughly 375pc away and about 400Myr old, has the potential to be an exciting new testbed for our understanding of stellar evolution. We present results from a spectroscopic campaign to characterize stars near the cluster's main-sequence turnoff; our goal is to identify candidate chemically peculiar stars among the cluster's A-stars. We obtained echelle spectra for 64 cluster members with ESPaDOnS on the 3.6m Canada-France-Hawaii Telescope, Maunakea Observatory, USA, and for six stars with SOPHIE on the 1.93m telescope at the Observatoire de Haute-Provence, France. We complemented these new observations with those of 13 high-mass cluster members from the HARPS-N archive; our overall sample is of 71 stars. We derived the fundamental parameters (Teff, logg, [M/H]) as well as v_e_sini for our sample using the sliced inverse regression technique, and then used iSpec to derive individual abundances of 12 chemical species. With these abundance determinations, we identified nine A-stars with anomalous levels of Sc, Ca, and other metallic lines. Follow-up observations of these Am candidates with a known age can transform them into benchmarks for evolutionary models that include atomic diffusion and help build a better understanding of the complex interactions between macroscopic and microscopic processes in stellar interiors.

Cone search capability for table J/AJ/164/255/table2 (Atmospheric parameters and abundances of the analyzed spectra)