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Gaia FGK benchmark ...
Gaia FGK benchmark stars : Metallicity
- Article/chapterEnglish2014
Publisher, publication year, extent ...
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2014-04-18
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EDP Sciences,2014
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printrdacarrier
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LIBRIS-ID:oai:DiVA.org:uu-225067
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-225067URI
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https://doi.org/10.1051/0004-6361/201322440DOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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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.
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Heiter, UlrikeUppsala universitet,Observationell astrofysik(Swepub:uu)ulhei450
(author)
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Soubiran, C.
(author)
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Blanco-Cuaresma, S.
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Worley, C. C.
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Pancino, E.
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Cantat-Gaudin, T.
(author)
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Magrini, L.
(author)
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Bergemann, M.
(author)
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Gonzalez Hernandez, J.
(author)
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Hill, V.
(author)
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Lardo, C.
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de Laverny, P.
(author)
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Lind, K.
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Masseron, T.
(author)
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Montes, D.
(author)
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Mucciarelli, A.
(author)
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Nordlander, ThomasUppsala universitet,Institutionen för fysik och astronomi(Swepub:uu)thono452
(author)
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Blanco, A. Recto
(author)
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Sobeck, J.
(author)
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Sordo, R.
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Sousa, S. G.
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Tabernero, H.
(author)
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Vallenari, A.
(author)
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Van Eck, S.
(author)
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Uppsala universitetObservationell astrofysik
(creator_code:org_t)
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In:Astronomy and Astrophysics: EDP Sciences564, s. A133-0004-63611432-0746
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Jofre, P.
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Heiter, Ulrike
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Soubiran, C.
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Blanco-Cuaresma, ...
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Worley, C. C.
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Pancino, E.
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Cantat-Gaudin, T ...
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Magrini, L.
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Bergemann, M.
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Gonzalez Hernand ...
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Hill, V.
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Lardo, C.
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de Laverny, P.
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Lind, K.
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Masseron, T.
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Montes, D.
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Mucciarelli, A.
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Nordlander, Thom ...
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Blanco, A. Recto
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Sobeck, J.
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Sordo, R.
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Sousa, S. G.
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Tabernero, H.
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Vallenari, A.
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Van Eck, S.
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NATURAL SCIENCES
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Uppsala University