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  • Jofre, P. (author)

Gaia FGK benchmark stars : Metallicity

  • Article/chapterEnglish2014

Publisher, publication year, extent ...

  • 2014-04-18
  • EDP Sciences,2014
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-225067
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-225067URI
  • https://doi.org/10.1051/0004-6361/201322440DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Context. To calibrate automatic pipelines that determine atmospheric parameters of stars, one needs a sample of stars, or "benchmark stars", with well-defined parameters to be used as a reference. Aims. We provide detailed documentation of the iron abundance determination of the 34 FGK-type benchmark stars that are selected to be the pillars for calibration of the one billion Gaia stars. They cover a wide range of temperatures, surface gravities, and metallicities. Methods. Up to seven different methods were used to analyze an observed spectral library of high resolutions and high signal-to-noise ratios. The metallicity was determined by assuming a value of effective temperature and surface gravity obtained from fundamental relations; that is, these parameters were known a priori and independently from the spectra. Results. We present a set of metallicity values obtained in a homogeneous way for our sample of benchmark stars. In addition to this value, we provide detailed documentation of the associated uncertainties.Finally, we report a value of the metallicity of the cool giant psi Phe for the first time.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Heiter, UlrikeUppsala universitet,Observationell astrofysik(Swepub:uu)ulhei450 (author)
  • Soubiran, C. (author)
  • Blanco-Cuaresma, S. (author)
  • Worley, C. C. (author)
  • Pancino, E. (author)
  • Cantat-Gaudin, T. (author)
  • Magrini, L. (author)
  • Bergemann, M. (author)
  • Gonzalez Hernandez, J. (author)
  • Hill, V. (author)
  • Lardo, C. (author)
  • de Laverny, P. (author)
  • Lind, K. (author)
  • Masseron, T. (author)
  • Montes, D. (author)
  • Mucciarelli, A. (author)
  • Nordlander, ThomasUppsala universitet,Institutionen för fysik och astronomi(Swepub:uu)thono452 (author)
  • Blanco, A. Recto (author)
  • Sobeck, J. (author)
  • Sordo, R. (author)
  • Sousa, S. G. (author)
  • Tabernero, H. (author)
  • Vallenari, A. (author)
  • Van Eck, S. (author)
  • Uppsala universitetObservationell astrofysik (creator_code:org_t)

Related titles

  • In:Astronomy and Astrophysics: EDP Sciences564, s. A133-0004-63611432-0746

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