One Star to Tag Them All (OSTTA)

Context. Open clusters are ideal laboratories to investigate a variety of astrophysical topics, from the properties Galactic disc stellar evolution models. For this purpose, we need know their chemical composition in detail. Unfortunately, number systems with abundances determined high resolution spectroscopy remains small. Aims. Our aim is increase open radial velocities and by sampling few stars which had not been previously studied. Methods. We obtained spectra FIbre-fed Echelle Spectrograph at Nordic Optical Telescope for 41 belonging 20 clusters. These have astrometric membership probabilities Gaia second data release. Results. derived velocites all observed were used confirm corresponding Gulliver 37, cannot be sure star real member. atmospheric parameters 32 considered cluster members. discarded five because they very low gravity or properly constrained due signal-to-noise ratio spectra. Therefore, detailed 28 17 most them, first analysis available literature. Finally, compared our sample large population well-studied The studied follow trends, both kinematical, described majority It worth mentioning that three metal-poor (NGC 1027, NGC 1750, Trumpler 2) enhanced Si, but other α-elements (Mg, Ca, Ti).