Chemical abundances in open cluster Stock 2

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.