First estimates of the fundamental parameters of three Large Magellanic Cloud clusters

Autores
Piatti, Andres Eduardo; Claria Olmedo, Juan Jose; Parisi, Maria Celeste; Ahumada, Andrea Veronica
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
As part of an ongoing project to investigate the cluster formation and chemical evolution history in the Large Magellanic Cloud (LMC), we have used the CTIO 0.9 m telescope to obtain CCD imaging in the Washington system of NGC 2161, SL 874, and KMHK 1719—three unstudied star clusters located in the outer region of the LMC. We measured T1 magnitudes and C T1 colors for a total of 9611 stars distributed throughout cluster areas of 13:6 × 13:6 arcmin2. Cluster radii were estimated from star counts distributed throughout the entire observed fields. Careful attention was paid to setting apart the cluster and field star distributions so that statistically cleaned color-magnitude diagrams (CMDs) were obtained. Based on the best fits of isochrones computed by the Padova group to the (T1, C T1) CMDs, the δT1 index, and the standard giant branch procedure, ages and metallicities were derived for the three clusters. The different methods for both age and metallicity determination are in good agreement. The three clusters were found to be of intermediate-age (∼1 Gyr) and relatively metal-poor (½Fe=H ∼ 0:7 dex). By combining the current results with others available in the literature, a total sample of 45 well-known LMC clusters older than 1 Gyr was compiled. By adopting an age interval varying in terms of age according to a logarithmic law, we built the cluster age histogram, which statistically represents the intermediate-age and old stellar populations in the LMC. Two main cluster formation episodes that peaked at t ∼ 2 and ∼14 Gyr were detected. The present cluster age distribution was compared with star formation rates that were analytically derived in previous studies.
Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Claria Olmedo, Juan Jose. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Ahumada, Andrea Veronica. European Southern Observatory; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Clusters
Magellanic Clouds
Photometry
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:11336/19623
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling First estimates of the fundamental parameters of three Large Magellanic Cloud clustersPiatti, Andres EduardoClaria Olmedo, Juan JoseParisi, Maria CelesteAhumada, Andrea VeronicaClustersMagellanic CloudsPhotometryhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1As part of an ongoing project to investigate the cluster formation and chemical evolution history in the Large Magellanic Cloud (LMC), we have used the CTIO 0.9 m telescope to obtain CCD imaging in the Washington system of NGC 2161, SL 874, and KMHK 1719—three unstudied star clusters located in the outer region of the LMC. We measured T1 magnitudes and C T1 colors for a total of 9611 stars distributed throughout cluster areas of 13:6 × 13:6 arcmin2. Cluster radii were estimated from star counts distributed throughout the entire observed fields. Careful attention was paid to setting apart the cluster and field star distributions so that statistically cleaned color-magnitude diagrams (CMDs) were obtained. Based on the best fits of isochrones computed by the Padova group to the (T1, C T1) CMDs, the δT1 index, and the standard giant branch procedure, ages and metallicities were derived for the three clusters. The different methods for both age and metallicity determination are in good agreement. The three clusters were found to be of intermediate-age (∼1 Gyr) and relatively metal-poor (½Fe=H ∼ 0:7 dex). By combining the current results with others available in the literature, a total sample of 45 well-known LMC clusters older than 1 Gyr was compiled. By adopting an age interval varying in terms of age according to a logarithmic law, we built the cluster age histogram, which statistically represents the intermediate-age and old stellar populations in the LMC. Two main cluster formation episodes that peaked at t ∼ 2 and ∼14 Gyr were detected. The present cluster age distribution was compared with star formation rates that were analytically derived in previous studies.Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Claria Olmedo, Juan Jose. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Ahumada, Andrea Veronica. European Southern Observatory; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaUniversity of Chicago Press2011-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/19623Piatti, Andres Eduardo; Claria Olmedo, Juan Jose; Parisi, Maria Celeste; Ahumada, Andrea Veronica; First estimates of the fundamental parameters of three Large Magellanic Cloud clusters; University of Chicago Press; Publications of the Astronomical Society of the Pacific; 123; 903; 2-2011; 519-5300004-6280CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1086/659848info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1086/659848/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 Técnicas2025-09-29T10:32:09Zoai:ri.conicet.gov.ar:11336/19623instacron: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 10:32:09.84CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv First estimates of the fundamental parameters of three Large Magellanic Cloud clusters
title First estimates of the fundamental parameters of three Large Magellanic Cloud clusters
spellingShingle First estimates of the fundamental parameters of three Large Magellanic Cloud clusters
Piatti, Andres Eduardo
Clusters
Magellanic Clouds
Photometry
title_short First estimates of the fundamental parameters of three Large Magellanic Cloud clusters
title_full First estimates of the fundamental parameters of three Large Magellanic Cloud clusters
title_fullStr First estimates of the fundamental parameters of three Large Magellanic Cloud clusters
title_full_unstemmed First estimates of the fundamental parameters of three Large Magellanic Cloud clusters
title_sort First estimates of the fundamental parameters of three Large Magellanic Cloud clusters
dc.creator.none.fl_str_mv Piatti, Andres Eduardo
Claria Olmedo, Juan Jose
Parisi, Maria Celeste
Ahumada, Andrea Veronica
author Piatti, Andres Eduardo
author_facet Piatti, Andres Eduardo
Claria Olmedo, Juan Jose
Parisi, Maria Celeste
Ahumada, Andrea Veronica
author_role author
author2 Claria Olmedo, Juan Jose
Parisi, Maria Celeste
Ahumada, Andrea Veronica
author2_role author
author
author
dc.subject.none.fl_str_mv Clusters
Magellanic Clouds
Photometry
topic Clusters
Magellanic Clouds
Photometry
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv As part of an ongoing project to investigate the cluster formation and chemical evolution history in the Large Magellanic Cloud (LMC), we have used the CTIO 0.9 m telescope to obtain CCD imaging in the Washington system of NGC 2161, SL 874, and KMHK 1719—three unstudied star clusters located in the outer region of the LMC. We measured T1 magnitudes and C T1 colors for a total of 9611 stars distributed throughout cluster areas of 13:6 × 13:6 arcmin2. Cluster radii were estimated from star counts distributed throughout the entire observed fields. Careful attention was paid to setting apart the cluster and field star distributions so that statistically cleaned color-magnitude diagrams (CMDs) were obtained. Based on the best fits of isochrones computed by the Padova group to the (T1, C T1) CMDs, the δT1 index, and the standard giant branch procedure, ages and metallicities were derived for the three clusters. The different methods for both age and metallicity determination are in good agreement. The three clusters were found to be of intermediate-age (∼1 Gyr) and relatively metal-poor (½Fe=H ∼ 0:7 dex). By combining the current results with others available in the literature, a total sample of 45 well-known LMC clusters older than 1 Gyr was compiled. By adopting an age interval varying in terms of age according to a logarithmic law, we built the cluster age histogram, which statistically represents the intermediate-age and old stellar populations in the LMC. Two main cluster formation episodes that peaked at t ∼ 2 and ∼14 Gyr were detected. The present cluster age distribution was compared with star formation rates that were analytically derived in previous studies.
Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Claria Olmedo, Juan Jose. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Ahumada, Andrea Veronica. European Southern Observatory; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description As part of an ongoing project to investigate the cluster formation and chemical evolution history in the Large Magellanic Cloud (LMC), we have used the CTIO 0.9 m telescope to obtain CCD imaging in the Washington system of NGC 2161, SL 874, and KMHK 1719—three unstudied star clusters located in the outer region of the LMC. We measured T1 magnitudes and C T1 colors for a total of 9611 stars distributed throughout cluster areas of 13:6 × 13:6 arcmin2. Cluster radii were estimated from star counts distributed throughout the entire observed fields. Careful attention was paid to setting apart the cluster and field star distributions so that statistically cleaned color-magnitude diagrams (CMDs) were obtained. Based on the best fits of isochrones computed by the Padova group to the (T1, C T1) CMDs, the δT1 index, and the standard giant branch procedure, ages and metallicities were derived for the three clusters. The different methods for both age and metallicity determination are in good agreement. The three clusters were found to be of intermediate-age (∼1 Gyr) and relatively metal-poor (½Fe=H ∼ 0:7 dex). By combining the current results with others available in the literature, a total sample of 45 well-known LMC clusters older than 1 Gyr was compiled. By adopting an age interval varying in terms of age according to a logarithmic law, we built the cluster age histogram, which statistically represents the intermediate-age and old stellar populations in the LMC. Two main cluster formation episodes that peaked at t ∼ 2 and ∼14 Gyr were detected. The present cluster age distribution was compared with star formation rates that were analytically derived in previous studies.
publishDate 2011
dc.date.none.fl_str_mv 2011-02
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/11336/19623
Piatti, Andres Eduardo; Claria Olmedo, Juan Jose; Parisi, Maria Celeste; Ahumada, Andrea Veronica; First estimates of the fundamental parameters of three Large Magellanic Cloud clusters; University of Chicago Press; Publications of the Astronomical Society of the Pacific; 123; 903; 2-2011; 519-530
0004-6280
CONICET Digital
CONICET
url http://hdl.handle.net/11336/19623
identifier_str_mv Piatti, Andres Eduardo; Claria Olmedo, Juan Jose; Parisi, Maria Celeste; Ahumada, Andrea Veronica; First estimates of the fundamental parameters of three Large Magellanic Cloud clusters; University of Chicago Press; Publications of the Astronomical Society of the Pacific; 123; 903; 2-2011; 519-530
0004-6280
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1086/659848
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1086/659848/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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv University of Chicago Press
publisher.none.fl_str_mv University of Chicago Press
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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