The VISCACHA survey - V. Rejuvenating three faint SMC clusters

Autores
Bica, Eduardo; Maia, Francisco; Oliveira, Raphael A. P.; Dias, Bruno; Santos Jr., João F. C.; Rocha, J.P.; Kerber, L.; Gardin, J.F.; Armond, T.; Parisi, Maria Celeste; de Souza Oliveira, Fabiano; Barbuy, B.
Año de publicación
2022
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present the analysis of three faint clusters of the Small Magellanic Cloud RZ 82, HW 42, and RZ 158. We employed the SOAR telescope instrument SAM with adaptive optics, allowing us to reach to V ∼23-24 mag, unprecedentedly, a depth sufficient to measure ages of up to about 10-12 Gyr. All three clusters are resolved to their centres, and the resulting colour-magnitude diagrams (CMDs) allow us to derive ages of 3.9, 2.6, and 4.8 Gyr, respectively. These results are significantly younger than previous determinations (7.1, 5.0, and 8.3 Gyr, respectively), based on integrated photometry or shallower CMDs. We rule out older ages for these clusters based on deep photometry and statistical isochrone fitting. We also estimate metallicities for the three clusters of [Fe/H]=-0.68, -0.57, and -0.90, respectively. These updated ages and metallicities are in good agreement with the age-metallicity relation for the bulk of SMC clusters. Total cluster masses ranging from ∼ 7-11 103 M⊙ were estimated from integrated flux, consistent with masses estimated for other SMC clusters of similar ages. These results reduce the number of SMC clusters known to be older than about 5 Gyr and highlight the need of deep and spatially resolved photometry to determine accurate ages for older low-luminosity SMC star clusters.
Fil: Bica, Eduardo. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Maia, Francisco. Universidade Federal do Rio de Janeiro; Brasil
Fil: Oliveira, Raphael A. P.. Universidade de Sao Paulo; Brasil
Fil: Dias, Bruno. Universidad de Tarapaca.; Chile
Fil: Santos Jr., João F. C.. Universidade Federal de Minas Gerais; Brasil
Fil: Rocha, J.P.. Universidade Estadual de Santa Cruz; Brasil
Fil: Kerber, L.. Universidade Estadual de Santa Cruz; Brasil
Fil: Gardin, J.F.. Universidade Do Estado de Mina Gerais (uemg);
Fil: Armond, T.. Universidade Federal de São João del-Rei; Brasil
Fil: Parisi, Maria Celeste. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: de Souza Oliveira, Fabiano. Universidade de Sao Paulo; Brasil. Leibniz Universitat Hannover; Alemania
Fil: Barbuy, B.. Universidade de Sao Paulo; Brasil
Materia
GALAXIES: STAR CLUSTERS: GENERAL
MAGELLANIC CLOUDS
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:11336/203233
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/203233
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The VISCACHA survey - V. Rejuvenating three faint SMC clustersBica, EduardoMaia, FranciscoOliveira, Raphael A. P.Dias, BrunoSantos Jr., João F. C.Rocha, J.P.Kerber, L.Gardin, J.F.Armond, T.Parisi, Maria Celestede Souza Oliveira, FabianoBarbuy, B.GALAXIES: STAR CLUSTERS: GENERALMAGELLANIC CLOUDShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present the analysis of three faint clusters of the Small Magellanic Cloud RZ 82, HW 42, and RZ 158. We employed the SOAR telescope instrument SAM with adaptive optics, allowing us to reach to V ∼23-24 mag, unprecedentedly, a depth sufficient to measure ages of up to about 10-12 Gyr. All three clusters are resolved to their centres, and the resulting colour-magnitude diagrams (CMDs) allow us to derive ages of 3.9, 2.6, and 4.8 Gyr, respectively. These results are significantly younger than previous determinations (7.1, 5.0, and 8.3 Gyr, respectively), based on integrated photometry or shallower CMDs. We rule out older ages for these clusters based on deep photometry and statistical isochrone fitting. We also estimate metallicities for the three clusters of [Fe/H]=-0.68, -0.57, and -0.90, respectively. These updated ages and metallicities are in good agreement with the age-metallicity relation for the bulk of SMC clusters. Total cluster masses ranging from ∼ 7-11 103 M⊙ were estimated from integrated flux, consistent with masses estimated for other SMC clusters of similar ages. These results reduce the number of SMC clusters known to be older than about 5 Gyr and highlight the need of deep and spatially resolved photometry to determine accurate ages for older low-luminosity SMC star clusters.Fil: Bica, Eduardo. Universidade Federal do Rio Grande do Sul; BrasilFil: Maia, Francisco. Universidade Federal do Rio de Janeiro; BrasilFil: Oliveira, Raphael A. P.. Universidade de Sao Paulo; BrasilFil: Dias, Bruno. Universidad de Tarapaca.; ChileFil: Santos Jr., João F. C.. Universidade Federal de Minas Gerais; BrasilFil: Rocha, J.P.. Universidade Estadual de Santa Cruz; BrasilFil: Kerber, L.. Universidade Estadual de Santa Cruz; BrasilFil: Gardin, J.F.. Universidade Do Estado de Mina Gerais (uemg);Fil: Armond, T.. Universidade Federal de São João del-Rei; BrasilFil: Parisi, Maria Celeste. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: de Souza Oliveira, Fabiano. Universidade de Sao Paulo; Brasil. Leibniz Universitat Hannover; AlemaniaFil: Barbuy, B.. Universidade de Sao Paulo; BrasilOxford University Press2022-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/203233Bica, Eduardo; Maia, Francisco; Oliveira, Raphael A. P.; Dias, Bruno; Santos Jr., João F. C.; et al.; The VISCACHA survey - V. Rejuvenating three faint SMC clusters; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 517; 1; 11-2022; L41-L450035-87111745-3933CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/2209.05532info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnrasl/article-abstract/517/1/L41/6701629?redirectedFrom=fulltextinfo:eu-repo/semantics/altIdentifier/doi/10.1093/mnrasl/slac108info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:06:15Zoai:ri.conicet.gov.ar:11336/203233instacron: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 11:06:16.217CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The VISCACHA survey - V. Rejuvenating three faint SMC clusters
title The VISCACHA survey - V. Rejuvenating three faint SMC clusters
spellingShingle The VISCACHA survey - V. Rejuvenating three faint SMC clusters
Bica, Eduardo
GALAXIES: STAR CLUSTERS: GENERAL
MAGELLANIC CLOUDS
title_short The VISCACHA survey - V. Rejuvenating three faint SMC clusters
title_full The VISCACHA survey - V. Rejuvenating three faint SMC clusters
title_fullStr The VISCACHA survey - V. Rejuvenating three faint SMC clusters
title_full_unstemmed The VISCACHA survey - V. Rejuvenating three faint SMC clusters
title_sort The VISCACHA survey - V. Rejuvenating three faint SMC clusters
dc.creator.none.fl_str_mv Bica, Eduardo
Maia, Francisco
Oliveira, Raphael A. P.
Dias, Bruno
Santos Jr., João F. C.
Rocha, J.P.
Kerber, L.
Gardin, J.F.
Armond, T.
Parisi, Maria Celeste
de Souza Oliveira, Fabiano
Barbuy, B.
author Bica, Eduardo
author_facet Bica, Eduardo
Maia, Francisco
Oliveira, Raphael A. P.
Dias, Bruno
Santos Jr., João F. C.
Rocha, J.P.
Kerber, L.
Gardin, J.F.
Armond, T.
Parisi, Maria Celeste
de Souza Oliveira, Fabiano
Barbuy, B.
author_role author
author2 Maia, Francisco
Oliveira, Raphael A. P.
Dias, Bruno
Santos Jr., João F. C.
Rocha, J.P.
Kerber, L.
Gardin, J.F.
Armond, T.
Parisi, Maria Celeste
de Souza Oliveira, Fabiano
Barbuy, B.
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv GALAXIES: STAR CLUSTERS: GENERAL
MAGELLANIC CLOUDS
topic GALAXIES: STAR CLUSTERS: GENERAL
MAGELLANIC CLOUDS
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 the analysis of three faint clusters of the Small Magellanic Cloud RZ 82, HW 42, and RZ 158. We employed the SOAR telescope instrument SAM with adaptive optics, allowing us to reach to V ∼23-24 mag, unprecedentedly, a depth sufficient to measure ages of up to about 10-12 Gyr. All three clusters are resolved to their centres, and the resulting colour-magnitude diagrams (CMDs) allow us to derive ages of 3.9, 2.6, and 4.8 Gyr, respectively. These results are significantly younger than previous determinations (7.1, 5.0, and 8.3 Gyr, respectively), based on integrated photometry or shallower CMDs. We rule out older ages for these clusters based on deep photometry and statistical isochrone fitting. We also estimate metallicities for the three clusters of [Fe/H]=-0.68, -0.57, and -0.90, respectively. These updated ages and metallicities are in good agreement with the age-metallicity relation for the bulk of SMC clusters. Total cluster masses ranging from ∼ 7-11 103 M⊙ were estimated from integrated flux, consistent with masses estimated for other SMC clusters of similar ages. These results reduce the number of SMC clusters known to be older than about 5 Gyr and highlight the need of deep and spatially resolved photometry to determine accurate ages for older low-luminosity SMC star clusters.
Fil: Bica, Eduardo. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Maia, Francisco. Universidade Federal do Rio de Janeiro; Brasil
Fil: Oliveira, Raphael A. P.. Universidade de Sao Paulo; Brasil
Fil: Dias, Bruno. Universidad de Tarapaca.; Chile
Fil: Santos Jr., João F. C.. Universidade Federal de Minas Gerais; Brasil
Fil: Rocha, J.P.. Universidade Estadual de Santa Cruz; Brasil
Fil: Kerber, L.. Universidade Estadual de Santa Cruz; Brasil
Fil: Gardin, J.F.. Universidade Do Estado de Mina Gerais (uemg);
Fil: Armond, T.. Universidade Federal de São João del-Rei; Brasil
Fil: Parisi, Maria Celeste. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: de Souza Oliveira, Fabiano. Universidade de Sao Paulo; Brasil. Leibniz Universitat Hannover; Alemania
Fil: Barbuy, B.. Universidade de Sao Paulo; Brasil
description We present the analysis of three faint clusters of the Small Magellanic Cloud RZ 82, HW 42, and RZ 158. We employed the SOAR telescope instrument SAM with adaptive optics, allowing us to reach to V ∼23-24 mag, unprecedentedly, a depth sufficient to measure ages of up to about 10-12 Gyr. All three clusters are resolved to their centres, and the resulting colour-magnitude diagrams (CMDs) allow us to derive ages of 3.9, 2.6, and 4.8 Gyr, respectively. These results are significantly younger than previous determinations (7.1, 5.0, and 8.3 Gyr, respectively), based on integrated photometry or shallower CMDs. We rule out older ages for these clusters based on deep photometry and statistical isochrone fitting. We also estimate metallicities for the three clusters of [Fe/H]=-0.68, -0.57, and -0.90, respectively. These updated ages and metallicities are in good agreement with the age-metallicity relation for the bulk of SMC clusters. Total cluster masses ranging from ∼ 7-11 103 M⊙ were estimated from integrated flux, consistent with masses estimated for other SMC clusters of similar ages. These results reduce the number of SMC clusters known to be older than about 5 Gyr and highlight the need of deep and spatially resolved photometry to determine accurate ages for older low-luminosity SMC star clusters.
publishDate 2022
dc.date.none.fl_str_mv 2022-11
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/11336/203233
Bica, Eduardo; Maia, Francisco; Oliveira, Raphael A. P.; Dias, Bruno; Santos Jr., João F. C.; et al.; The VISCACHA survey - V. Rejuvenating three faint SMC clusters; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 517; 1; 11-2022; L41-L45
0035-8711
1745-3933
CONICET Digital
CONICET
url http://hdl.handle.net/11336/203233
identifier_str_mv Bica, Eduardo; Maia, Francisco; Oliveira, Raphael A. P.; Dias, Bruno; Santos Jr., João F. C.; et al.; The VISCACHA survey - V. Rejuvenating three faint SMC clusters; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 517; 1; 11-2022; L41-L45
0035-8711
1745-3933
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/2209.05532
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnrasl/article-abstract/517/1/L41/6701629?redirectedFrom=fulltext
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnrasl/slac108
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 Oxford University Press
publisher.none.fl_str_mv Oxford University 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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score 12.982451

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