One Star to Tag Them All (OSTTA): I. Radial velocities and chemical abundances for 20 poorly studied open clusters

Abstract

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

19 pages Accepted for publication on A&A

References in corpus (38)

• The Gaia mission
• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• galpy: A Python Library for Galactic Dynamics
• The GALAH Survey: Scientific Motivation
• Gaia Early Data Release 3: Photometric content and validation
• Painting a portrait of the Galactic disc with its stellar clusters
• Determining stellar atmospheric parameters and chemical abundances of FGK stars with iSpec
• A Search for Stars of Very Low Metal Abundance. VI. Detailed Abundances of 313 Metal-Poor Stars
• Modern stellar spectroscopy caveats
• Updated parameters of 1743 open clusters based on Gaia DR2
• Age determination for 269 $Gaia$ DR2 Open Clusters
• Hunting for open clusters in \textit{Gaia} DR2: $582$ new OCs in the Galactic disc
• Young [$\alpha$/Fe]-enhanced stars discovered by CoRoT and APOGEE: What is their origin?
• Atomic data for the Gaia-ESO Survey
• The Open Cluster Chemical Abundances and Mapping Survey: IV. Abundances for 128 Open Clusters using SDSS/APOGEE DR16
• Non-LTE aluminium abundances in late-type stars
• 3D kinematics and age distribution of the Open Cluster population
• Hunting for open clusters in \textit{Gaia} DR2: the Galactic anticentre
• The GALAH survey: tracing the Galactic disk with Open Clusters
• NGC 6819: testing the asteroseismic mass scale, mass loss, and evidence for products of non-standard evolution
• Binary stars in the Galactic thick disc
• Open clusters in APOGEE and GALAH: Combining Gaia and ground-based spectroscopic surveys
• The Gaia-ESO Survey: a new approach to chemically characterising young open clusters
• The evolution of the Milky Way: New insights from open clusters
• The Galactic metallicity gradient shown by open clusters in the light of radial migration
• Abundance-age relations with red clump stars in open clusters
• OCCASO II. Physical parameters and Fe abundances of Red Clump stars in 18 Open Clusters
• Differential abundances of open clusters and their tidal tails: chemical tagging and chemical homogeneity
• The Gaia-ESO Survey: Target selection of open cluster stars
• The Gaia-ESO Survey: A new approach to chemically characterising young open clusters II. Abundances of the neutron-capture elements Cu, Sr, Y, Zr, Ba, La, and Ce
• The analysis of realistic Stellar Gaia mock catalogues. I. Red Clump Stars as tracers of the central bar
• Exploring the s-process history in the Galactic disk: Cerium abundances and gradients in Open Clusters from the OCCAM/APOGEE sample
• Stellar Population Astrophysics (SPA) with TNG Atmospheric parameters of members of 16 unstudied open clusters
• Asteroseismology of overmassive, undermassive, and potential past members of the open cluster NGC6791
• The old, metal-poor, anticentre open cluster Trumpler 5
• The Gaia-ESO Survey: N-body modelling of the Gamma Velorum cluster
• OCCASO IV. Radial Velocities and Open Cluster Kinematics
• A study of the Czernik 2 and NGC 7654 open clusters using CCD UBV photometric and Gaia EDR3 data

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• The Gaia-ESO survey: mapping the shape and evolution of the radial abundance gradients with open clusters
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