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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/61801
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T10:35:24Zoai: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:34982025-09-29 10:35:25.061CONICET 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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1844614372300685312 |
score |
13.070432 |