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Gaia FGK Benchmark Stars: fundamental Teff and log g of the third version

hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorSOUBIRAN, Caroline
hal.structure.identifierObservatoire de la Côte d'Azur [OCA]
dc.contributor.authorCREEVEY, Orlagh
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorLAGARDE, Nadège
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorBROUILLET, Nathalie
dc.contributor.authorJOFRE, Paula
hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
dc.contributor.authorCASAMIQUELA, Laia
dc.contributor.authorHEITER, Ulrike
dc.contributor.authorGOMEZ, Claudia Aguilera
dc.contributor.authorVITALI, Sara
dc.contributor.authorWORLEY, Clare
dc.contributor.authorSILVA, Danielle De Brito
dc.date.issued2023
dc.description.abstractEnContext. Large spectroscopic surveys devoted to the study of the Milky Way, including Gaia, use automated pipelines to massively determine the atmospheric parameters of millions of stars. The Gaia FGK Benchmark Stars are reference stars with Teff and log g derived through fundamental relations, independently of spectroscopy, to be used as anchors for the parameter scale. The first and second versions of the sample have been extensively used for that purpose, and more generally to help constrain stellar models. Aims. We provide the third version of the Gaia FGK Benchmark Stars, an extended set intended to improve the calibration of spectroscopic surveys, and their interconnection. Methods. We have compiled about 200 candidates which have precise measurements of angular diameters and parallaxes. We determined their bolometric fluxes by fitting their spectral energy distribution. Masses were determined using two sets of stellar evolution models. In a companion paper we describe the determination of metallicities and detailed abundances. Results. We provide a new set of 192 Gaia FGK Benchmark Stars with their fundamental Teff and logg, and with uncertainties lower than 2% for most stars. Compared to the previous versions, the homogeneity and accuracy of the fundamental parameters are significantly improved thanks to the high quality of the Gaia data reflecting on distances and bolometric fluxes.
dc.language.isoen
dc.subject.enSolar and Stellar Astrophysics (astro-ph.SR)
dc.title.enGaia FGK Benchmark Stars: fundamental Teff and log g of the third version
dc.typeDocument de travail - Pré-publication
dc.identifier.doi10.48550/arXiv.2310.11302
dc.subject.halPlanète et Univers [physics]
dc.identifier.arxiv2310.11302
hal.identifierhal-04279884
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04279884v1
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