Chemical analysis of eight giant stars of the globular cluster NGC 6366

Detalhes bibliográficos
Autor(a) principal: Puls, Arthur Alencastro
Data de Publicação: 2018
Outros Autores: Alves-Brito, Alan, Campos, Fabíola, Dias, Bruno Moreira de Souza, Barbuy, Beatriz
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/179616
Resumo: The metal-rich Galactic globular cluster NGC6366 is the fifth closest to the Sun. Despite its interest, it has received scarce attention, and little is known about its internal structure. Its kinematics suggests a link to the halo, but its metallicity indicates otherwise. We present a detailed chemical analysis of eight giant stars of NGC6366, using high-resolution and highquality spectra (R > 40 000, S/N > 60) obtained at the VLT (8.2 m) and CFHT (3.6 m) telescopes. We attempted to characterize its chemistry and to search for evidence of multiple stellar populations. The atmospheric parameters were derived using the method of excitation and ionization equilibrium of Fe I and Fe II lines and from those atmospheric parameters we calculated the abundances for other elements and found that none of the elements measured presents star-to-star variation greater than the uncertainties. We compared the derived abundances with those of other globular clusters and field stars available in the literature. We determined a mean [Fe/H] = −0.60 ± 0.03 for NGC6366 and found some similarity of this object with M71, another inner halo globular cluster. The Na–O anticorrelation extension is short and no star-to-star variation in Al is found. The presence of second generation stars is not evident in NGC6366.
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spelling Puls, Arthur AlencastroAlves-Brito, AlanCampos, FabíolaDias, Bruno Moreira de SouzaBarbuy, Beatriz2018-06-21T02:32:39Z20180035-8711http://hdl.handle.net/10183/179616001066806The metal-rich Galactic globular cluster NGC6366 is the fifth closest to the Sun. Despite its interest, it has received scarce attention, and little is known about its internal structure. Its kinematics suggests a link to the halo, but its metallicity indicates otherwise. We present a detailed chemical analysis of eight giant stars of NGC6366, using high-resolution and highquality spectra (R > 40 000, S/N > 60) obtained at the VLT (8.2 m) and CFHT (3.6 m) telescopes. We attempted to characterize its chemistry and to search for evidence of multiple stellar populations. The atmospheric parameters were derived using the method of excitation and ionization equilibrium of Fe I and Fe II lines and from those atmospheric parameters we calculated the abundances for other elements and found that none of the elements measured presents star-to-star variation greater than the uncertainties. We compared the derived abundances with those of other globular clusters and field stars available in the literature. We determined a mean [Fe/H] = −0.60 ± 0.03 for NGC6366 and found some similarity of this object with M71, another inner halo globular cluster. The Na–O anticorrelation extension is short and no star-to-star variation in Al is found. The presence of second generation stars is not evident in NGC6366.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 476, no. 1 (May 2018), p. 690-704Aglomerados globularesComposicao estelarPopulacoes estelaresMetalicidadeStars: abundancesGalaxy: abundancesGlobular clusters: individual: NGC6366Chemical analysis of eight giant stars of the globular cluster NGC 6366Estrangeiroinfo: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:UFRGSORIGINAL001066806.pdf001066806.pdfTexto completo (inglês)application/pdf1423437http://www.lume.ufrgs.br/bitstream/10183/179616/1/001066806.pdf1197efdec2e94dbe3408439821b091f1MD51TEXT001066806.pdf.txt001066806.pdf.txtExtracted Texttext/plain81609http://www.lume.ufrgs.br/bitstream/10183/179616/2/001066806.pdf.txt70ab43e37694e9ee8940a0f460e5e019MD5210183/1796162023-05-14 03:24:17.776753oai:www.lume.ufrgs.br:10183/179616Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-05-14T06:24:17Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Chemical analysis of eight giant stars of the globular cluster NGC 6366
title Chemical analysis of eight giant stars of the globular cluster NGC 6366
spellingShingle Chemical analysis of eight giant stars of the globular cluster NGC 6366
Puls, Arthur Alencastro
Aglomerados globulares
Composicao estelar
Populacoes estelares
Metalicidade
Stars: abundances
Galaxy: abundances
Globular clusters: individual: NGC6366
title_short Chemical analysis of eight giant stars of the globular cluster NGC 6366
title_full Chemical analysis of eight giant stars of the globular cluster NGC 6366
title_fullStr Chemical analysis of eight giant stars of the globular cluster NGC 6366
title_full_unstemmed Chemical analysis of eight giant stars of the globular cluster NGC 6366
title_sort Chemical analysis of eight giant stars of the globular cluster NGC 6366
author Puls, Arthur Alencastro
author_facet Puls, Arthur Alencastro
Alves-Brito, Alan
Campos, Fabíola
Dias, Bruno Moreira de Souza
Barbuy, Beatriz
author_role author
author2 Alves-Brito, Alan
Campos, Fabíola
Dias, Bruno Moreira de Souza
Barbuy, Beatriz
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Puls, Arthur Alencastro
Alves-Brito, Alan
Campos, Fabíola
Dias, Bruno Moreira de Souza
Barbuy, Beatriz
dc.subject.por.fl_str_mv Aglomerados globulares
Composicao estelar
Populacoes estelares
Metalicidade
topic Aglomerados globulares
Composicao estelar
Populacoes estelares
Metalicidade
Stars: abundances
Galaxy: abundances
Globular clusters: individual: NGC6366
dc.subject.eng.fl_str_mv Stars: abundances
Galaxy: abundances
Globular clusters: individual: NGC6366
description The metal-rich Galactic globular cluster NGC6366 is the fifth closest to the Sun. Despite its interest, it has received scarce attention, and little is known about its internal structure. Its kinematics suggests a link to the halo, but its metallicity indicates otherwise. We present a detailed chemical analysis of eight giant stars of NGC6366, using high-resolution and highquality spectra (R > 40 000, S/N > 60) obtained at the VLT (8.2 m) and CFHT (3.6 m) telescopes. We attempted to characterize its chemistry and to search for evidence of multiple stellar populations. The atmospheric parameters were derived using the method of excitation and ionization equilibrium of Fe I and Fe II lines and from those atmospheric parameters we calculated the abundances for other elements and found that none of the elements measured presents star-to-star variation greater than the uncertainties. We compared the derived abundances with those of other globular clusters and field stars available in the literature. We determined a mean [Fe/H] = −0.60 ± 0.03 for NGC6366 and found some similarity of this object with M71, another inner halo globular cluster. The Na–O anticorrelation extension is short and no star-to-star variation in Al is found. The presence of second generation stars is not evident in NGC6366.
publishDate 2018
dc.date.accessioned.fl_str_mv 2018-06-21T02:32:39Z
dc.date.issued.fl_str_mv 2018
dc.type.driver.fl_str_mv Estrangeiro
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dc.relation.ispartof.pt_BR.fl_str_mv Monthly notices of the royal astronomical society. Oxford. Vol. 476, no. 1 (May 2018), p. 690-704
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