Assessment of [Fe/H] determinations for FGK stars in spectroscopic surveys

Abstract

The number of stars with a measured value of [Fe/H] is considerably increasing thanks to spectroscopic surveys. However different methodologies, inputs and assumptions used in spectral analyses lead to different precisions in [Fe/H] and possibly to systematic differences that need to be evaluated. It is essential to understand the characteristics of each survey to fully exploit their potential, in particular if the surveys are combined. The purpose of this study is to compare [Fe/H] determinations from the largest spectroscopic surveys (APOGEE, GALAH, the Gaia ESO survey, RAVE, LAMOST, SEGUE ) to other catalogues taken as reference. Offsets and dispersions of the residuals are examined as well as their trends with other parameters. We use reference samples providing independent determinations of [Fe/H] which are compared to those from the surveys for common stars. The distribution of the residuals is assessed through simple statistics that measures the offset between two catalogues and the dispersion representative of the precision of both catalogues. When relevant, linear fits are performed. A large sample of FGK-type stars with [Fe/H] based on high-resolution, high signal to noise spectroscopy was built from the PASTEL catalogue to provide a reference sample. We also use FGK members in open and globular clusters to assess the internal consistency of [Fe/H] of each survey. The agreement of median [Fe/H] values for clusters observed by different surveys is discussed. All the surveys overestimate the low metallicities, and some of them also underestimate the high metallicities. They perform well in the most populated intermediate metallicity range, whatever the resolution. In most cases the typical precision that we deduce from the comparisons is in good agreement with the uncertainties quoted in the catalogues. Some exceptions to this general behaviour are discussed.

accepted in A&A

References in corpus (14)

• The Gaia mission
• The Radial Velocity Experiment (RAVE): first data release
• The chemical make-up of the Sun: A 2020 vision
• Painting a portrait of the Galactic disc with its stellar clusters
• The SEGUE Stellar Parameter Pipeline. I. Description and Initial Validation Tests
• Gaia EDR3 view on Galactic globular clusters
• APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South
• Clusters and mirages: cataloguing stellar aggregates in the Milky Way
• Non-LTE line formation of Fe in late-type stars - III. 3D non-LTE analysis of metal-poor stars
• The LAMOST Stellar Parameter Pipeline at Peking University --- LSP3
• The SEGUE Stellar Parameter Pipeline. IV. Validation with an Extended Sample of Galactic Globular and Open Clusters
• Survey of Surveys I: The largest catalogue of radial velocities for the Galaxy
• Abundance-age relations with red clump stars in open clusters
• Differential abundances of open clusters and their tidal tails: chemical tagging and chemical homogeneity

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