The VISCACHA survey : V. Rejuvenating three faint SMC clusters
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/257854 |
Resumo: | 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 massesranging 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. |
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Bica, Eduardo Luiz DamianiMaia, Francisco F. S.Oliveira, Raphael Augusto Pereira deDias, Bruno Moreira de SouzaSantos Junior, Joao Francisco Coelho dosRocha, João Pedro dos SantosKerber, Leandro de OliveiraCarvalho, João Francisco Gardin deArmond, Ana Cristina Moreira Machado ZadraParisi, M. C.Souza, Stefano O.Barbuy, Beatriz2023-05-10T03:26:58Z20221745-3933http://hdl.handle.net/10183/257854001164546We 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 massesranging 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.application/pdfengMonthly notices of the Royal Astronomical Society. Letters. Oxford, England. Vol. 517, no. 1 (Nov. 2022), p. L41-L45Nuvens de magalhaesAglomerados estelaresFotometria estelarMagellanic CloudsGalaxies : Star clusters : GeneralThe VISCACHA survey : V. Rejuvenating three faint SMC clustersEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001164546.pdf.txt001164546.pdf.txtExtracted Texttext/plain25016http://www.lume.ufrgs.br/bitstream/10183/257854/2/001164546.pdf.txtf78a1ee7b28c9dd1ae8d984e5448050bMD52ORIGINAL001164546.pdfTexto completo (inglês)application/pdf9424396http://www.lume.ufrgs.br/bitstream/10183/257854/1/001164546.pdf00821d39839dfb4dd93d124886ef566dMD5110183/2578542023-10-25 03:38:46.9226oai:www.lume.ufrgs.br:10183/257854Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-10-25T06:38:46Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.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 Luiz Damiani Nuvens de magalhaes Aglomerados estelares Fotometria estelar Magellanic Clouds Galaxies : Star clusters : General |
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 |
author |
Bica, Eduardo Luiz Damiani |
author_facet |
Bica, Eduardo Luiz Damiani Maia, Francisco F. S. Oliveira, Raphael Augusto Pereira de Dias, Bruno Moreira de Souza Santos Junior, Joao Francisco Coelho dos Rocha, João Pedro dos Santos Kerber, Leandro de Oliveira Carvalho, João Francisco Gardin de Armond, Ana Cristina Moreira Machado Zadra Parisi, M. C. Souza, Stefano O. Barbuy, Beatriz |
author_role |
author |
author2 |
Maia, Francisco F. S. Oliveira, Raphael Augusto Pereira de Dias, Bruno Moreira de Souza Santos Junior, Joao Francisco Coelho dos Rocha, João Pedro dos Santos Kerber, Leandro de Oliveira Carvalho, João Francisco Gardin de Armond, Ana Cristina Moreira Machado Zadra Parisi, M. C. Souza, Stefano O. Barbuy, Beatriz |
author2_role |
author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Bica, Eduardo Luiz Damiani Maia, Francisco F. S. Oliveira, Raphael Augusto Pereira de Dias, Bruno Moreira de Souza Santos Junior, Joao Francisco Coelho dos Rocha, João Pedro dos Santos Kerber, Leandro de Oliveira Carvalho, João Francisco Gardin de Armond, Ana Cristina Moreira Machado Zadra Parisi, M. C. Souza, Stefano O. Barbuy, Beatriz |
dc.subject.por.fl_str_mv |
Nuvens de magalhaes Aglomerados estelares Fotometria estelar |
topic |
Nuvens de magalhaes Aglomerados estelares Fotometria estelar Magellanic Clouds Galaxies : Star clusters : General |
dc.subject.eng.fl_str_mv |
Magellanic Clouds Galaxies : Star clusters : General |
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 massesranging 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.issued.fl_str_mv |
2022 |
dc.date.accessioned.fl_str_mv |
2023-05-10T03:26:58Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/257854 |
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1745-3933 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001164546 |
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http://hdl.handle.net/10183/257854 |
dc.language.iso.fl_str_mv |
eng |
language |
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dc.relation.ispartof.pt_BR.fl_str_mv |
Monthly notices of the Royal Astronomical Society. Letters. Oxford, England. Vol. 517, no. 1 (Nov. 2022), p. L41-L45 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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