Gaia FGK Benchmark stars: Opening the black box of stellar element abundance determination

Gaia and its complementary spectroscopic surveys combined will yield the most comprehensive database of kinematic and chemical information of stars in the Milky Way. The Gaia FGK benchmark stars play a central role in this matter as they are calibration pillars for the atmospheric parameters and che...

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Detalles Bibliográficos
Autores: Jofré, P., Heiter, U., Worley, C. C., Blanco Cuaresma, S., Soubiran, C., Masseron, T., Hawkins, K., Adibekyan, V., Buder, S., Casamiquela, Laia, Gilmore, G., Hourihane, A., Tabernero, Hugo M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/160590
Acceso en línea:https://hdl.handle.net/2445/160590
Access Level:acceso abierto
Palabra clave:Hipòtesi de Gaia
Estels
Via Làctia
Gaia hypothesis
Stars
Milky Way
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repository_id_str
spelling Gaia FGK Benchmark stars: Opening the black box of stellar element abundance determinationJofré, P.Heiter, U.Worley, C. C.Blanco Cuaresma, S.Soubiran, C.Masseron, T.Hawkins, K.Adibekyan, V.Buder, S.Casamiquela, LaiaGilmore, G.Hourihane, A.Tabernero, Hugo M.Hipòtesi de GaiaEstelsVia LàctiaGaia hypothesisStarsMilky WayGaia and its complementary spectroscopic surveys combined will yield the most comprehensive database of kinematic and chemical information of stars in the Milky Way. The Gaia FGK benchmark stars play a central role in this matter as they are calibration pillars for the atmospheric parameters and chemical abundances for various surveys. The spectroscopic analyses of the benchmark stars are done by combining different methods, and the results will be affected by the systematic uncertainties inherent in each method. In this paper, we explore some of these systematic uncertainties. We determined line abundances of Ca, Cr, Mn and Co for four benchmark stars using six different methods. We changed the default input parameters of the different codes in a systematic way and found, in some cases, significant differences between the results. Since there is no consensus on the correct values for many of these default parameters, we urge the community to raise discussions towards standard input parameters that could alleviate the difference in abundances obtained by different methods. In this work, we provide quantitative estimates of uncertainties in elemental abundances due to the effect of differing technical assumptions in spectrum modelling.EDP Sciences2020202020162020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion22 p.application/pdfhttps://hdl.handle.net/2445/160590Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1051/0004-6361/201629833Astronomy & Astrophysics, 2016, vol. 601, num. A38https://doi.org/10.1051/0004-6361/201629833info:eu-repo/grantAgreement/EC/FP7/320360(c) The European Southern Observatory (ESO), 2016info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1605902026-05-29T05:05:01Z
dc.title.none.fl_str_mv Gaia FGK Benchmark stars: Opening the black box of stellar element abundance determination
title Gaia FGK Benchmark stars: Opening the black box of stellar element abundance determination
spellingShingle Gaia FGK Benchmark stars: Opening the black box of stellar element abundance determination
Jofré, P.
Hipòtesi de Gaia
Estels
Via Làctia
Gaia hypothesis
Stars
Milky Way
title_short Gaia FGK Benchmark stars: Opening the black box of stellar element abundance determination
title_full Gaia FGK Benchmark stars: Opening the black box of stellar element abundance determination
title_fullStr Gaia FGK Benchmark stars: Opening the black box of stellar element abundance determination
title_full_unstemmed Gaia FGK Benchmark stars: Opening the black box of stellar element abundance determination
title_sort Gaia FGK Benchmark stars: Opening the black box of stellar element abundance determination
dc.creator.none.fl_str_mv Jofré, P.
Heiter, U.
Worley, C. C.
Blanco Cuaresma, S.
Soubiran, C.
Masseron, T.
Hawkins, K.
Adibekyan, V.
Buder, S.
Casamiquela, Laia
Gilmore, G.
Hourihane, A.
Tabernero, Hugo M.
author Jofré, P.
author_facet Jofré, P.
Heiter, U.
Worley, C. C.
Blanco Cuaresma, S.
Soubiran, C.
Masseron, T.
Hawkins, K.
Adibekyan, V.
Buder, S.
Casamiquela, Laia
Gilmore, G.
Hourihane, A.
Tabernero, Hugo M.
author_role author
author2 Heiter, U.
Worley, C. C.
Blanco Cuaresma, S.
Soubiran, C.
Masseron, T.
Hawkins, K.
Adibekyan, V.
Buder, S.
Casamiquela, Laia
Gilmore, G.
Hourihane, A.
Tabernero, Hugo M.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Hipòtesi de Gaia
Estels
Via Làctia
Gaia hypothesis
Stars
Milky Way
topic Hipòtesi de Gaia
Estels
Via Làctia
Gaia hypothesis
Stars
Milky Way
description Gaia and its complementary spectroscopic surveys combined will yield the most comprehensive database of kinematic and chemical information of stars in the Milky Way. The Gaia FGK benchmark stars play a central role in this matter as they are calibration pillars for the atmospheric parameters and chemical abundances for various surveys. The spectroscopic analyses of the benchmark stars are done by combining different methods, and the results will be affected by the systematic uncertainties inherent in each method. In this paper, we explore some of these systematic uncertainties. We determined line abundances of Ca, Cr, Mn and Co for four benchmark stars using six different methods. We changed the default input parameters of the different codes in a systematic way and found, in some cases, significant differences between the results. Since there is no consensus on the correct values for many of these default parameters, we urge the community to raise discussions towards standard input parameters that could alleviate the difference in abundances obtained by different methods. In this work, we provide quantitative estimates of uncertainties in elemental abundances due to the effect of differing technical assumptions in spectrum modelling.
publishDate 2016
dc.date.none.fl_str_mv 2016
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/160590
url https://hdl.handle.net/2445/160590
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1051/0004-6361/201629833
Astronomy & Astrophysics, 2016, vol. 601, num. A38
https://doi.org/10.1051/0004-6361/201629833
info:eu-repo/grantAgreement/EC/FP7/320360
dc.rights.none.fl_str_mv (c) The European Southern Observatory (ESO), 2016
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The European Southern Observatory (ESO), 2016
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 22 p.
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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