Age Determination of 15 Old to Intermediate-Age Small Magellanic Cloud Star Clusters
- Autores
- Parisi, Maria Celeste; Geisler, Doug; Carraro, G.; Claria Olmedo, Juan Jose; Costa, E; Grocholski, A.J.; Sarajedini, A.; Leiton, R.; Piatti, Andres Eduardo
- Año de publicación
- 2014
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We present color–magnitude diagrams in theVandIbands for 15 star clusters in the Small Magellanic Cloud (SMC)based on data taken with the Very Large Telescope (VLT, Chile). We selected these clusters from our previouswork, wherein we derived cluster radial velocities and metallicities from calcium II infrared triplet (CaT) spectraalso taken with the VLT. We discovered that the ages of six of our clusters have been appreciably underestimatedby previous studies, which used comparatively small telescopes, graphically illustrating the need for large aperturesto obtain reliable ages of old and intermediate-age SMC star clusters. In particular, three of these clusters, L4, L6,and L110, turn out to be among the oldest SMC clusters known, with ages of 7.9±1.1, 8.7±1.2, and 7.6±1.0 Gyr, respectively, helping to fill a possible “SMC cluster age gap.” Using the current ages and metallicities fromParisi et al., we analyze the age distribution, age gradient, and age–metallicity relation (AMR) of a sample of SMCclusters measured homogeneously. There is a suggestion of bimodality in the age distribution but it does not showa constant slope for the first 4 Gyr, and we find no evidence for an age gradient. Due to the improved ages of ourcluster sample, we find that our AMR is now better represented in the intermediate/old period than we had derivedin Parisi et al., where we simply took ages available in the literature. Additionally, clusters younger than∼4Gyrnow show better agreement with the bursting model of Pagel & Tautvaiˇsien ̇e, but we confirm that this model isnot a good representation of the AMR during the intermediate/old period. A more complicated model is needed toexplain the SMC chemical evolution in that period.
Fil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Geisler, Doug. Universidad de Concepción; Chile
Fil: Carraro, G.. European Southern Observatory. Santiago de Chile; Chile
Fil: Claria Olmedo, Juan Jose. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Costa, E. Universidad de Chile; Chile
Fil: Grocholski, A.J.. State University of Louisiana; Estados Unidos
Fil: Sarajedini, A.. University of Florida; Estados Unidos
Fil: Leiton, R.. Universidad de Concepción; Chile
Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina - Materia
-
galaxies: star
clusters: general
Magellanic CloudsOnline
only material:color figures
extended figure - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/33753
Ver los metadatos del registro completo
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Age Determination of 15 Old to Intermediate-Age Small Magellanic Cloud Star ClustersParisi, Maria CelesteGeisler, DougCarraro, G.Claria Olmedo, Juan JoseCosta, EGrocholski, A.J.Sarajedini, A.Leiton, R.Piatti, Andres Eduardogalaxies: starclusters: generalMagellanic CloudsOnlineonly material:color figuresextended figurehttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present color–magnitude diagrams in theVandIbands for 15 star clusters in the Small Magellanic Cloud (SMC)based on data taken with the Very Large Telescope (VLT, Chile). We selected these clusters from our previouswork, wherein we derived cluster radial velocities and metallicities from calcium II infrared triplet (CaT) spectraalso taken with the VLT. We discovered that the ages of six of our clusters have been appreciably underestimatedby previous studies, which used comparatively small telescopes, graphically illustrating the need for large aperturesto obtain reliable ages of old and intermediate-age SMC star clusters. In particular, three of these clusters, L4, L6,and L110, turn out to be among the oldest SMC clusters known, with ages of 7.9±1.1, 8.7±1.2, and 7.6±1.0 Gyr, respectively, helping to fill a possible “SMC cluster age gap.” Using the current ages and metallicities fromParisi et al., we analyze the age distribution, age gradient, and age–metallicity relation (AMR) of a sample of SMCclusters measured homogeneously. There is a suggestion of bimodality in the age distribution but it does not showa constant slope for the first 4 Gyr, and we find no evidence for an age gradient. Due to the improved ages of ourcluster sample, we find that our AMR is now better represented in the intermediate/old period than we had derivedin Parisi et al., where we simply took ages available in the literature. Additionally, clusters younger than∼4Gyrnow show better agreement with the bursting model of Pagel & Tautvaiˇsien ̇e, but we confirm that this model isnot a good representation of the AMR during the intermediate/old period. A more complicated model is needed toexplain the SMC chemical evolution in that period.Fil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; ArgentinaFil: Geisler, Doug. Universidad de Concepción; ChileFil: Carraro, G.. European Southern Observatory. Santiago de Chile; ChileFil: Claria Olmedo, Juan Jose. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; ArgentinaFil: Costa, E. Universidad de Chile; ChileFil: Grocholski, A.J.. State University of Louisiana; Estados UnidosFil: Sarajedini, A.. University of Florida; Estados UnidosFil: Leiton, R.. Universidad de Concepción; ChileFil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; ArgentinaIOP Publishing2014-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/33753Parisi, Maria Celeste; Geisler, Doug; Carraro, G.; Claria Olmedo, Juan Jose; Costa, E; et al.; Age Determination of 15 Old to Intermediate-Age Small Magellanic Cloud Star Clusters; IOP Publishing; Astronomical Journal; 147; 71; 1-2014; 71-880004-6256CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1088/0004-6256/147/4/71info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-6256/147/4/71/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 Técnicas2025-09-29T10:34:54Zoai:ri.conicet.gov.ar:11336/33753instacron: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 10:34:54.508CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
Age Determination of 15 Old to Intermediate-Age Small Magellanic Cloud Star Clusters |
| title |
Age Determination of 15 Old to Intermediate-Age Small Magellanic Cloud Star Clusters |
| spellingShingle |
Age Determination of 15 Old to Intermediate-Age Small Magellanic Cloud Star Clusters Parisi, Maria Celeste galaxies: star clusters: general Magellanic CloudsOnline only material:color figures extended figure |
| title_short |
Age Determination of 15 Old to Intermediate-Age Small Magellanic Cloud Star Clusters |
| title_full |
Age Determination of 15 Old to Intermediate-Age Small Magellanic Cloud Star Clusters |
| title_fullStr |
Age Determination of 15 Old to Intermediate-Age Small Magellanic Cloud Star Clusters |
| title_full_unstemmed |
Age Determination of 15 Old to Intermediate-Age Small Magellanic Cloud Star Clusters |
| title_sort |
Age Determination of 15 Old to Intermediate-Age Small Magellanic Cloud Star Clusters |
| dc.creator.none.fl_str_mv |
Parisi, Maria Celeste Geisler, Doug Carraro, G. Claria Olmedo, Juan Jose Costa, E Grocholski, A.J. Sarajedini, A. Leiton, R. Piatti, Andres Eduardo |
| author |
Parisi, Maria Celeste |
| author_facet |
Parisi, Maria Celeste Geisler, Doug Carraro, G. Claria Olmedo, Juan Jose Costa, E Grocholski, A.J. Sarajedini, A. Leiton, R. Piatti, Andres Eduardo |
| author_role |
author |
| author2 |
Geisler, Doug Carraro, G. Claria Olmedo, Juan Jose Costa, E Grocholski, A.J. Sarajedini, A. Leiton, R. Piatti, Andres Eduardo |
| author2_role |
author author author author author author author author |
| dc.subject.none.fl_str_mv |
galaxies: star clusters: general Magellanic CloudsOnline only material:color figures extended figure |
| topic |
galaxies: star clusters: general Magellanic CloudsOnline only material:color figures extended figure |
| 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 color–magnitude diagrams in theVandIbands for 15 star clusters in the Small Magellanic Cloud (SMC)based on data taken with the Very Large Telescope (VLT, Chile). We selected these clusters from our previouswork, wherein we derived cluster radial velocities and metallicities from calcium II infrared triplet (CaT) spectraalso taken with the VLT. We discovered that the ages of six of our clusters have been appreciably underestimatedby previous studies, which used comparatively small telescopes, graphically illustrating the need for large aperturesto obtain reliable ages of old and intermediate-age SMC star clusters. In particular, three of these clusters, L4, L6,and L110, turn out to be among the oldest SMC clusters known, with ages of 7.9±1.1, 8.7±1.2, and 7.6±1.0 Gyr, respectively, helping to fill a possible “SMC cluster age gap.” Using the current ages and metallicities fromParisi et al., we analyze the age distribution, age gradient, and age–metallicity relation (AMR) of a sample of SMCclusters measured homogeneously. There is a suggestion of bimodality in the age distribution but it does not showa constant slope for the first 4 Gyr, and we find no evidence for an age gradient. Due to the improved ages of ourcluster sample, we find that our AMR is now better represented in the intermediate/old period than we had derivedin Parisi et al., where we simply took ages available in the literature. Additionally, clusters younger than∼4Gyrnow show better agreement with the bursting model of Pagel & Tautvaiˇsien ̇e, but we confirm that this model isnot a good representation of the AMR during the intermediate/old period. A more complicated model is needed toexplain the SMC chemical evolution in that period. Fil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina Fil: Geisler, Doug. Universidad de Concepción; Chile Fil: Carraro, G.. European Southern Observatory. Santiago de Chile; Chile Fil: Claria Olmedo, Juan Jose. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina Fil: Costa, E. Universidad de Chile; Chile Fil: Grocholski, A.J.. State University of Louisiana; Estados Unidos Fil: Sarajedini, A.. University of Florida; Estados Unidos Fil: Leiton, R.. Universidad de Concepción; Chile Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina |
| description |
We present color–magnitude diagrams in theVandIbands for 15 star clusters in the Small Magellanic Cloud (SMC)based on data taken with the Very Large Telescope (VLT, Chile). We selected these clusters from our previouswork, wherein we derived cluster radial velocities and metallicities from calcium II infrared triplet (CaT) spectraalso taken with the VLT. We discovered that the ages of six of our clusters have been appreciably underestimatedby previous studies, which used comparatively small telescopes, graphically illustrating the need for large aperturesto obtain reliable ages of old and intermediate-age SMC star clusters. In particular, three of these clusters, L4, L6,and L110, turn out to be among the oldest SMC clusters known, with ages of 7.9±1.1, 8.7±1.2, and 7.6±1.0 Gyr, respectively, helping to fill a possible “SMC cluster age gap.” Using the current ages and metallicities fromParisi et al., we analyze the age distribution, age gradient, and age–metallicity relation (AMR) of a sample of SMCclusters measured homogeneously. There is a suggestion of bimodality in the age distribution but it does not showa constant slope for the first 4 Gyr, and we find no evidence for an age gradient. Due to the improved ages of ourcluster sample, we find that our AMR is now better represented in the intermediate/old period than we had derivedin Parisi et al., where we simply took ages available in the literature. Additionally, clusters younger than∼4Gyrnow show better agreement with the bursting model of Pagel & Tautvaiˇsien ̇e, but we confirm that this model isnot a good representation of the AMR during the intermediate/old period. A more complicated model is needed toexplain the SMC chemical evolution in that period. |
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2014 |
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2014-01 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://hdl.handle.net/11336/33753 Parisi, Maria Celeste; Geisler, Doug; Carraro, G.; Claria Olmedo, Juan Jose; Costa, E; et al.; Age Determination of 15 Old to Intermediate-Age Small Magellanic Cloud Star Clusters; IOP Publishing; Astronomical Journal; 147; 71; 1-2014; 71-88 0004-6256 CONICET Digital CONICET |
| url |
http://hdl.handle.net/11336/33753 |
| identifier_str_mv |
Parisi, Maria Celeste; Geisler, Doug; Carraro, G.; Claria Olmedo, Juan Jose; Costa, E; et al.; Age Determination of 15 Old to Intermediate-Age Small Magellanic Cloud Star Clusters; IOP Publishing; Astronomical Journal; 147; 71; 1-2014; 71-88 0004-6256 CONICET Digital CONICET |
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eng |
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