Probing the large Magellanic Cloud's recent chemical enrichment history through its star clusters

Autores
Palma, Tali; Claria Olmedo, Juan Jose; Geisler, Doug; Gramajo, Luciana Veronic; Ahumada, Andrea Veronica
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present Washington system colour-magnitude diagrams (CMDs) for 17 practically unstudied star clusters located in the bar as well as in the inner disc and outer regions of the Large Magellanic Cloud (LMC). Cluster sizes were estimated from star counts distributed throughout the entire observed fields. Based on the best fits of theoretical isochrones to the cleaned (C - T1, T1) CMDs, as well as on the δT1 parameter and the standard giant branch method, we derive ages and metallicities for the cluster sample. Four objects are found to be intermediateage clusters (1.8-2.5 Gyr), with [Fe/H] ranging from -0.66 to -0.84. With the exception of SL 263, a very young cluster (~16 Myr), the remaining 12 objects are aged between 0.32 and 0.89 Gyr, with their [Fe/H] values ranging from -0.19 to -0.50. We combined our results with those for other 231 clusters studied in a similar way using the Washington system. The resulting age-metallicity relationship shows a significant dispersion in metallicities, whatever age is considered. Although there seems to exist a clear tendency for the younger clusters to be more metal rich than the intermediate ones, we believe that none of the chemical evolution models currently available in the literature reasonably well represents the recent chemical enrichment processes in the LMC clusters. The present sample of 17 clusters is part of our ongoing project of generating a data base of LMC clusters homogeneously studied using the Washington photometric system and applying the same analysis procedure.
Fil: Palma, Tali. Instituto de Astronomía, Universidad Católica del Norte; Chile. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Departamento de Astrofísica Estelar; Argentina
Fil: Claria Olmedo, Juan Jose. Millennium Institute Of Astrophysics; Chile
Fil: Geisler, Doug. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Gramajo, Luciana Veronic. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Ahumada, Andrea Veronica. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Departamento de Astrofísica Estelar; Argentina
Materia
GALAXIES: INDIVIDUAL: LMC
GALAXIES: STAR CLUSTERS: GENERAL
TECHNIQUES: PHOTOMETRIC
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:11336/61559
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Probing the large Magellanic Cloud's recent chemical enrichment history through its star clustersPalma, TaliClaria Olmedo, Juan JoseGeisler, DougGramajo, Luciana VeronicAhumada, Andrea VeronicaGALAXIES: INDIVIDUAL: LMCGALAXIES: STAR CLUSTERS: GENERALTECHNIQUES: PHOTOMETRIChttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present Washington system colour-magnitude diagrams (CMDs) for 17 practically unstudied star clusters located in the bar as well as in the inner disc and outer regions of the Large Magellanic Cloud (LMC). Cluster sizes were estimated from star counts distributed throughout the entire observed fields. Based on the best fits of theoretical isochrones to the cleaned (C - T1, T1) CMDs, as well as on the δT1 parameter and the standard giant branch method, we derive ages and metallicities for the cluster sample. Four objects are found to be intermediateage clusters (1.8-2.5 Gyr), with [Fe/H] ranging from -0.66 to -0.84. With the exception of SL 263, a very young cluster (~16 Myr), the remaining 12 objects are aged between 0.32 and 0.89 Gyr, with their [Fe/H] values ranging from -0.19 to -0.50. We combined our results with those for other 231 clusters studied in a similar way using the Washington system. The resulting age-metallicity relationship shows a significant dispersion in metallicities, whatever age is considered. Although there seems to exist a clear tendency for the younger clusters to be more metal rich than the intermediate ones, we believe that none of the chemical evolution models currently available in the literature reasonably well represents the recent chemical enrichment processes in the LMC clusters. The present sample of 17 clusters is part of our ongoing project of generating a data base of LMC clusters homogeneously studied using the Washington photometric system and applying the same analysis procedure.Fil: Palma, Tali. Instituto de Astronomía, Universidad Católica del Norte; Chile. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Departamento de Astrofísica Estelar; ArgentinaFil: Claria Olmedo, Juan Jose. Millennium Institute Of Astrophysics; ChileFil: Geisler, Doug. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; ArgentinaFil: Gramajo, Luciana Veronic. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; ArgentinaFil: Ahumada, Andrea Veronica. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Departamento de Astrofísica Estelar; ArgentinaWiley Blackwell Publishing, Inc2015-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/61559Palma, Tali; Claria Olmedo, Juan Jose; Geisler, Doug; Gramajo, Luciana Veronic; Ahumada, Andrea Veronica; Probing the large Magellanic Cloud's recent chemical enrichment history through its star clusters; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 450; 2; 4-2015; 2122-21310035-87111365-2966CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/450/2/2122/985561info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stv762info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:24:36Zoai:ri.conicet.gov.ar:11336/61559instacron: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 11:24:36.314CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Probing the large Magellanic Cloud's recent chemical enrichment history through its star clusters
title Probing the large Magellanic Cloud's recent chemical enrichment history through its star clusters
spellingShingle Probing the large Magellanic Cloud's recent chemical enrichment history through its star clusters
Palma, Tali
GALAXIES: INDIVIDUAL: LMC
GALAXIES: STAR CLUSTERS: GENERAL
TECHNIQUES: PHOTOMETRIC
title_short Probing the large Magellanic Cloud's recent chemical enrichment history through its star clusters
title_full Probing the large Magellanic Cloud's recent chemical enrichment history through its star clusters
title_fullStr Probing the large Magellanic Cloud's recent chemical enrichment history through its star clusters
title_full_unstemmed Probing the large Magellanic Cloud's recent chemical enrichment history through its star clusters
title_sort Probing the large Magellanic Cloud's recent chemical enrichment history through its star clusters
dc.creator.none.fl_str_mv Palma, Tali
Claria Olmedo, Juan Jose
Geisler, Doug
Gramajo, Luciana Veronic
Ahumada, Andrea Veronica
author Palma, Tali
author_facet Palma, Tali
Claria Olmedo, Juan Jose
Geisler, Doug
Gramajo, Luciana Veronic
Ahumada, Andrea Veronica
author_role author
author2 Claria Olmedo, Juan Jose
Geisler, Doug
Gramajo, Luciana Veronic
Ahumada, Andrea Veronica
author2_role author
author
author
author
dc.subject.none.fl_str_mv GALAXIES: INDIVIDUAL: LMC
GALAXIES: STAR CLUSTERS: GENERAL
TECHNIQUES: PHOTOMETRIC
topic GALAXIES: INDIVIDUAL: LMC
GALAXIES: STAR CLUSTERS: GENERAL
TECHNIQUES: PHOTOMETRIC
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 present Washington system colour-magnitude diagrams (CMDs) for 17 practically unstudied star clusters located in the bar as well as in the inner disc and outer regions of the Large Magellanic Cloud (LMC). Cluster sizes were estimated from star counts distributed throughout the entire observed fields. Based on the best fits of theoretical isochrones to the cleaned (C - T1, T1) CMDs, as well as on the δT1 parameter and the standard giant branch method, we derive ages and metallicities for the cluster sample. Four objects are found to be intermediateage clusters (1.8-2.5 Gyr), with [Fe/H] ranging from -0.66 to -0.84. With the exception of SL 263, a very young cluster (~16 Myr), the remaining 12 objects are aged between 0.32 and 0.89 Gyr, with their [Fe/H] values ranging from -0.19 to -0.50. We combined our results with those for other 231 clusters studied in a similar way using the Washington system. The resulting age-metallicity relationship shows a significant dispersion in metallicities, whatever age is considered. Although there seems to exist a clear tendency for the younger clusters to be more metal rich than the intermediate ones, we believe that none of the chemical evolution models currently available in the literature reasonably well represents the recent chemical enrichment processes in the LMC clusters. The present sample of 17 clusters is part of our ongoing project of generating a data base of LMC clusters homogeneously studied using the Washington photometric system and applying the same analysis procedure.
Fil: Palma, Tali. Instituto de Astronomía, Universidad Católica del Norte; Chile. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Departamento de Astrofísica Estelar; Argentina
Fil: Claria Olmedo, Juan Jose. Millennium Institute Of Astrophysics; Chile
Fil: Geisler, Doug. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Gramajo, Luciana Veronic. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Ahumada, Andrea Veronica. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Departamento de Astrofísica Estelar; Argentina
description We present Washington system colour-magnitude diagrams (CMDs) for 17 practically unstudied star clusters located in the bar as well as in the inner disc and outer regions of the Large Magellanic Cloud (LMC). Cluster sizes were estimated from star counts distributed throughout the entire observed fields. Based on the best fits of theoretical isochrones to the cleaned (C - T1, T1) CMDs, as well as on the δT1 parameter and the standard giant branch method, we derive ages and metallicities for the cluster sample. Four objects are found to be intermediateage clusters (1.8-2.5 Gyr), with [Fe/H] ranging from -0.66 to -0.84. With the exception of SL 263, a very young cluster (~16 Myr), the remaining 12 objects are aged between 0.32 and 0.89 Gyr, with their [Fe/H] values ranging from -0.19 to -0.50. We combined our results with those for other 231 clusters studied in a similar way using the Washington system. The resulting age-metallicity relationship shows a significant dispersion in metallicities, whatever age is considered. Although there seems to exist a clear tendency for the younger clusters to be more metal rich than the intermediate ones, we believe that none of the chemical evolution models currently available in the literature reasonably well represents the recent chemical enrichment processes in the LMC clusters. The present sample of 17 clusters is part of our ongoing project of generating a data base of LMC clusters homogeneously studied using the Washington photometric system and applying the same analysis procedure.
publishDate 2015
dc.date.none.fl_str_mv 2015-04
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/11336/61559
Palma, Tali; Claria Olmedo, Juan Jose; Geisler, Doug; Gramajo, Luciana Veronic; Ahumada, Andrea Veronica; Probing the large Magellanic Cloud's recent chemical enrichment history through its star clusters; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 450; 2; 4-2015; 2122-2131
0035-8711
1365-2966
CONICET Digital
CONICET
url http://hdl.handle.net/11336/61559
identifier_str_mv Palma, Tali; Claria Olmedo, Juan Jose; Geisler, Doug; Gramajo, Luciana Veronic; Ahumada, Andrea Veronica; Probing the large Magellanic Cloud's recent chemical enrichment history through its star clusters; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 450; 2; 4-2015; 2122-2131
0035-8711
1365-2966
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/450/2/2122/985561
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stv762
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
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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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