CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clusters

Autores
Parisi, Maria Celeste; Geisler, Doug; Clariá, Juan José; Villanova, S.; Marcionni, Nelson Daniel; Sarajedini, A.; Grocholski, A.J.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We obtained spectra of red giants in 15 Small Magellanic Cloud (SMC) clusters in the region of the Ca ii lines with FORS2 on the Very Large Telescope. We determined the mean metallicity and radial velocity with mean errors of 0.05 dex and 2.6 km s-1, respectively, from a mean of 6.5 members per cluster. One cluster (B113) was too young for a reliable metallicity determination and was excluded from the sample. We combined the sample studied here with 15 clusters previously studied by us using the same technique, and with 7 clusters whose metallicities determined by other authors are on a scale similar to ours. This compilation of 36 clusters is the largest SMC cluster sample currently available with accurate and homogeneously determined metallicities. We found a high probability that the metallicity distribution is bimodal, with potential peaks at -1.1 and -0.8 dex. Our data show no strong evidence of a metallicity gradient in the SMC clusters, somewhat at odds with recent evidence from Ca ii triplet spectra of a large sample of field stars. This may be revealing possible differences in the chemical history of clusters and field stars. Our clusters show a significant dispersion of metallicities, whatever age is considered, which could be reflecting the lack of a unique age-metallicity relation in this galaxy. None of the chemical evolution models currently available in the literature satisfactorily represents the global chemical enrichment processes of SMC clusters.
Fil: Parisi, Maria Celeste. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Geisler, Doug. Universidad de Concepción; Chile
Fil: Clariá, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Villanova, S.. Universidad de Concepción; Chile
Fil: Marcionni, Nelson Daniel. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Sarajedini, A.. University of Florida; Estados Unidos
Fil: Grocholski, A.J.. State University of Louisiana; Estados Unidos
Materia
GALAXIES: STAR CLUSTERS: GENERAL
MAGELLANIC CLOUDS
STARS: ABUNDANCES
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/61801
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/61801
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clustersParisi, Maria CelesteGeisler, DougClariá, Juan JoséVillanova, S.Marcionni, Nelson DanielSarajedini, A.Grocholski, A.J.GALAXIES: STAR CLUSTERS: GENERALMAGELLANIC CLOUDSSTARS: ABUNDANCEShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We obtained spectra of red giants in 15 Small Magellanic Cloud (SMC) clusters in the region of the Ca ii lines with FORS2 on the Very Large Telescope. We determined the mean metallicity and radial velocity with mean errors of 0.05 dex and 2.6 km s-1, respectively, from a mean of 6.5 members per cluster. One cluster (B113) was too young for a reliable metallicity determination and was excluded from the sample. We combined the sample studied here with 15 clusters previously studied by us using the same technique, and with 7 clusters whose metallicities determined by other authors are on a scale similar to ours. This compilation of 36 clusters is the largest SMC cluster sample currently available with accurate and homogeneously determined metallicities. We found a high probability that the metallicity distribution is bimodal, with potential peaks at -1.1 and -0.8 dex. Our data show no strong evidence of a metallicity gradient in the SMC clusters, somewhat at odds with recent evidence from Ca ii triplet spectra of a large sample of field stars. This may be revealing possible differences in the chemical history of clusters and field stars. Our clusters show a significant dispersion of metallicities, whatever age is considered, which could be reflecting the lack of a unique age-metallicity relation in this galaxy. None of the chemical evolution models currently available in the literature satisfactorily represents the global chemical enrichment processes of SMC clusters.Fil: Parisi, Maria Celeste. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; ArgentinaFil: Geisler, Doug. Universidad de Concepción; ChileFil: Clariá, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; ArgentinaFil: Villanova, S.. Universidad de Concepción; ChileFil: Marcionni, Nelson Daniel. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; ArgentinaFil: Sarajedini, A.. University of Florida; Estados UnidosFil: Grocholski, A.J.. State University of Louisiana; Estados UnidosIOP Publishing2015-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/61801Parisi, Maria Celeste; Geisler, Doug; Clariá, Juan José; Villanova, S.; Marcionni, Nelson Daniel; et al.; CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clusters; IOP Publishing; Astronomical Journal; 149; 5; 5-2015; 154-1650004-6256CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1088/0004-6256/149/5/154info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-6256/149/5/154/metainfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:07:45Zoai:ri.conicet.gov.ar:11336/61801instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 12:07:45.819CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clusters
title CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clusters
spellingShingle CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clusters
Parisi, Maria Celeste
GALAXIES: STAR CLUSTERS: GENERAL
MAGELLANIC CLOUDS
STARS: ABUNDANCES
title_short CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clusters
title_full CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clusters
title_fullStr CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clusters
title_full_unstemmed CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clusters
title_sort CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clusters
dc.creator.none.fl_str_mv Parisi, Maria Celeste
Geisler, Doug
Clariá, Juan José
Villanova, S.
Marcionni, Nelson Daniel
Sarajedini, A.
Grocholski, A.J.
author Parisi, Maria Celeste
author_facet Parisi, Maria Celeste
Geisler, Doug
Clariá, Juan José
Villanova, S.
Marcionni, Nelson Daniel
Sarajedini, A.
Grocholski, A.J.
author_role author
author2 Geisler, Doug
Clariá, Juan José
Villanova, S.
Marcionni, Nelson Daniel
Sarajedini, A.
Grocholski, A.J.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv GALAXIES: STAR CLUSTERS: GENERAL
MAGELLANIC CLOUDS
STARS: ABUNDANCES
topic GALAXIES: STAR CLUSTERS: GENERAL
MAGELLANIC CLOUDS
STARS: ABUNDANCES
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We obtained spectra of red giants in 15 Small Magellanic Cloud (SMC) clusters in the region of the Ca ii lines with FORS2 on the Very Large Telescope. We determined the mean metallicity and radial velocity with mean errors of 0.05 dex and 2.6 km s-1, respectively, from a mean of 6.5 members per cluster. One cluster (B113) was too young for a reliable metallicity determination and was excluded from the sample. We combined the sample studied here with 15 clusters previously studied by us using the same technique, and with 7 clusters whose metallicities determined by other authors are on a scale similar to ours. This compilation of 36 clusters is the largest SMC cluster sample currently available with accurate and homogeneously determined metallicities. We found a high probability that the metallicity distribution is bimodal, with potential peaks at -1.1 and -0.8 dex. Our data show no strong evidence of a metallicity gradient in the SMC clusters, somewhat at odds with recent evidence from Ca ii triplet spectra of a large sample of field stars. This may be revealing possible differences in the chemical history of clusters and field stars. Our clusters show a significant dispersion of metallicities, whatever age is considered, which could be reflecting the lack of a unique age-metallicity relation in this galaxy. None of the chemical evolution models currently available in the literature satisfactorily represents the global chemical enrichment processes of SMC clusters.
Fil: Parisi, Maria Celeste. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Geisler, Doug. Universidad de Concepción; Chile
Fil: Clariá, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Villanova, S.. Universidad de Concepción; Chile
Fil: Marcionni, Nelson Daniel. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Sarajedini, A.. University of Florida; Estados Unidos
Fil: Grocholski, A.J.. State University of Louisiana; Estados Unidos
description We obtained spectra of red giants in 15 Small Magellanic Cloud (SMC) clusters in the region of the Ca ii lines with FORS2 on the Very Large Telescope. We determined the mean metallicity and radial velocity with mean errors of 0.05 dex and 2.6 km s-1, respectively, from a mean of 6.5 members per cluster. One cluster (B113) was too young for a reliable metallicity determination and was excluded from the sample. We combined the sample studied here with 15 clusters previously studied by us using the same technique, and with 7 clusters whose metallicities determined by other authors are on a scale similar to ours. This compilation of 36 clusters is the largest SMC cluster sample currently available with accurate and homogeneously determined metallicities. We found a high probability that the metallicity distribution is bimodal, with potential peaks at -1.1 and -0.8 dex. Our data show no strong evidence of a metallicity gradient in the SMC clusters, somewhat at odds with recent evidence from Ca ii triplet spectra of a large sample of field stars. This may be revealing possible differences in the chemical history of clusters and field stars. Our clusters show a significant dispersion of metallicities, whatever age is considered, which could be reflecting the lack of a unique age-metallicity relation in this galaxy. None of the chemical evolution models currently available in the literature satisfactorily represents the global chemical enrichment processes of SMC clusters.
publishDate 2015
dc.date.none.fl_str_mv 2015-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/61801
Parisi, Maria Celeste; Geisler, Doug; Clariá, Juan José; Villanova, S.; Marcionni, Nelson Daniel; et al.; CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clusters; IOP Publishing; Astronomical Journal; 149; 5; 5-2015; 154-165
0004-6256
CONICET Digital
CONICET
url http://hdl.handle.net/11336/61801
identifier_str_mv Parisi, Maria Celeste; Geisler, Doug; Clariá, Juan José; Villanova, S.; Marcionni, Nelson Daniel; et al.; CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clusters; IOP Publishing; Astronomical Journal; 149; 5; 5-2015; 154-165
0004-6256
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-6256/149/5/154
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-6256/149/5/154/meta
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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