Ages and metallicities of five intermediate-age star clusters projected towards the Small Magellanic Cloud

Detalhes bibliográficos
Autor(a) principal: Piatti, Andres E.
Data de Publicação: 2001
Outros Autores: Santos Junior, Joao Francisco Coelho dos, Claria Olmedo, Juan Jose, Bica, Eduardo Luiz Damiani, Sarajedini, Ata, Geisler, Doug
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/89970
Resumo: Colour–magnitude diagrams are presented for the first time for L32, L38, K28 (L43), K44 (L68) and L116, which are clusters projected on to the outer parts of the Small Magellanic Cloud (SMC). The photometry was carried out in the Washington system C and T1 filters, allowing the determination of ages by means of the magnitude difference between the red giant clump and the main-sequence turn-off, and metallicities from the red giant branch locus. The clusters have ages in the range 2–6 Gyr, and metallicities in the range -1.65 < ‰[Fe/HŠ] < -1.10, increasing the sample of intermediate-age clusters in the SMC. L116, the outermost cluster projected on to the SMC, is a foreground cluster, and somewhat closer to us than the Large Magellanic Cloud. Our results, combined with those for other clusters in the literature, show epochs of sudden chemical enrichment in the age–metallicity plane, which favour a bursting star formation history as opposed to a continuous one for the SMC.
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spelling Piatti, Andres E.Santos Junior, Joao Francisco Coelho dosClaria Olmedo, Juan JoseBica, Eduardo Luiz DamianiSarajedini, AtaGeisler, Doug2014-03-29T01:51:40Z20010035-8711http://hdl.handle.net/10183/89970000292122Colour–magnitude diagrams are presented for the first time for L32, L38, K28 (L43), K44 (L68) and L116, which are clusters projected on to the outer parts of the Small Magellanic Cloud (SMC). The photometry was carried out in the Washington system C and T1 filters, allowing the determination of ages by means of the magnitude difference between the red giant clump and the main-sequence turn-off, and metallicities from the red giant branch locus. The clusters have ages in the range 2–6 Gyr, and metallicities in the range -1.65 < ‰[Fe/HŠ] < -1.10, increasing the sample of intermediate-age clusters in the SMC. L116, the outermost cluster projected on to the SMC, is a foreground cluster, and somewhat closer to us than the Large Magellanic Cloud. Our results, combined with those for other clusters in the literature, show epochs of sudden chemical enrichment in the age–metallicity plane, which favour a bursting star formation history as opposed to a continuous one for the SMC.application/pdfengMonthly notices of the Royal Astronomical Society. Oxford. Vol. 325, no. 2 (Aug. 2001), p. 792-802Fotometria astronômicaAglomerados estelares globularesPequena Nuvem de MagalhãesAglomerados estelaresTechniques: photometricMagellanic cloudsGalaxies: star clustersAges and metallicities of five intermediate-age star clusters projected towards the Small Magellanic CloudEstrangeiroinfo: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:UFRGSORIGINAL000292122.pdf000292122.pdfTexto completo (inglês)application/pdf1370684http://www.lume.ufrgs.br/bitstream/10183/89970/1/000292122.pdf49996a2de258e4f52a6c3574c91948feMD51TEXT000292122.pdf.txt000292122.pdf.txtExtracted Texttext/plain49018http://www.lume.ufrgs.br/bitstream/10183/89970/2/000292122.pdf.txt400138e46e4d4e4796885c754a33f56eMD52THUMBNAIL000292122.pdf.jpg000292122.pdf.jpgGenerated Thumbnailimage/jpeg1859http://www.lume.ufrgs.br/bitstream/10183/89970/3/000292122.pdf.jpg12d497e6dd3d46536ae788e6085fa840MD5310183/899702024-04-13 06:45:25.609495oai:www.lume.ufrgs.br:10183/89970Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-04-13T09:45:25Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Ages and metallicities of five intermediate-age star clusters projected towards the Small Magellanic Cloud
title Ages and metallicities of five intermediate-age star clusters projected towards the Small Magellanic Cloud
spellingShingle Ages and metallicities of five intermediate-age star clusters projected towards the Small Magellanic Cloud
Piatti, Andres E.
Fotometria astronômica
Aglomerados estelares globulares
Pequena Nuvem de Magalhães
Aglomerados estelares
Techniques: photometric
Magellanic clouds
Galaxies: star clusters
title_short Ages and metallicities of five intermediate-age star clusters projected towards the Small Magellanic Cloud
title_full Ages and metallicities of five intermediate-age star clusters projected towards the Small Magellanic Cloud
title_fullStr Ages and metallicities of five intermediate-age star clusters projected towards the Small Magellanic Cloud
title_full_unstemmed Ages and metallicities of five intermediate-age star clusters projected towards the Small Magellanic Cloud
title_sort Ages and metallicities of five intermediate-age star clusters projected towards the Small Magellanic Cloud
author Piatti, Andres E.
author_facet Piatti, Andres E.
Santos Junior, Joao Francisco Coelho dos
Claria Olmedo, Juan Jose
Bica, Eduardo Luiz Damiani
Sarajedini, Ata
Geisler, Doug
author_role author
author2 Santos Junior, Joao Francisco Coelho dos
Claria Olmedo, Juan Jose
Bica, Eduardo Luiz Damiani
Sarajedini, Ata
Geisler, Doug
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Piatti, Andres E.
Santos Junior, Joao Francisco Coelho dos
Claria Olmedo, Juan Jose
Bica, Eduardo Luiz Damiani
Sarajedini, Ata
Geisler, Doug
dc.subject.por.fl_str_mv Fotometria astronômica
Aglomerados estelares globulares
Pequena Nuvem de Magalhães
Aglomerados estelares
topic Fotometria astronômica
Aglomerados estelares globulares
Pequena Nuvem de Magalhães
Aglomerados estelares
Techniques: photometric
Magellanic clouds
Galaxies: star clusters
dc.subject.eng.fl_str_mv Techniques: photometric
Magellanic clouds
Galaxies: star clusters
description Colour–magnitude diagrams are presented for the first time for L32, L38, K28 (L43), K44 (L68) and L116, which are clusters projected on to the outer parts of the Small Magellanic Cloud (SMC). The photometry was carried out in the Washington system C and T1 filters, allowing the determination of ages by means of the magnitude difference between the red giant clump and the main-sequence turn-off, and metallicities from the red giant branch locus. The clusters have ages in the range 2–6 Gyr, and metallicities in the range -1.65 < ‰[Fe/HŠ] < -1.10, increasing the sample of intermediate-age clusters in the SMC. L116, the outermost cluster projected on to the SMC, is a foreground cluster, and somewhat closer to us than the Large Magellanic Cloud. Our results, combined with those for other clusters in the literature, show epochs of sudden chemical enrichment in the age–metallicity plane, which favour a bursting star formation history as opposed to a continuous one for the SMC.
publishDate 2001
dc.date.issued.fl_str_mv 2001
dc.date.accessioned.fl_str_mv 2014-03-29T01:51:40Z
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dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Monthly notices of the Royal Astronomical Society. Oxford. Vol. 325, no. 2 (Aug. 2001), p. 792-802
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