VLT-UVES abundance analysis of four giants in NGC 6553
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/98983 |
Resumo: | Context. Metal-rich globular clusters trace the formation of bulges. Abundance ratios in the metal-rich globular clusters such as NGC 6553 can constrain the formation timescale of the Galactic bulge. Aims. The purpose of this study is to determine the metallicity and elemental ratios in individual stars of the metal-rich bulge globular cluster NGC 6553. Methods. A detailed abundance analysis of four giants in NGC 6553 is carried out, based on optical high-resolution échelle spectra obtained with UVES at the ESO VLT-UT2 Kueyen telescope. Results. A metallicity [Fe/H] = −0.20 dex is derived, together with α-element enhancement of Mg and Si ([Mg/Fe] = +0.28, [Si/Fe] = +0.21), solar Ca and Ti ([Ca/Fe]=+0.05, [Ti/Fe] = −0.01), and a mild enhancement of the r-process element Eu with [Eu/Fe]=+0.10. A mean heliocentric radial velocity of −1.86 km sˉ¹ is measured. We compare our results with previous investigations of the cluster. |
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Alves-Brito, AlanBarbuy, BeatrizZoccali, ManuelaMinniti, DanteOrtolani, SergioHill, VanessaRenzini, AlvioPasquini, LucaBica, Eduardo Luiz DamianiRich, Robert MichaelMeléndez, JorgeMomany, Yazan2014-07-31T02:05:12Z20060004-6361http://hdl.handle.net/10183/98983000595030Context. Metal-rich globular clusters trace the formation of bulges. Abundance ratios in the metal-rich globular clusters such as NGC 6553 can constrain the formation timescale of the Galactic bulge. Aims. The purpose of this study is to determine the metallicity and elemental ratios in individual stars of the metal-rich bulge globular cluster NGC 6553. Methods. A detailed abundance analysis of four giants in NGC 6553 is carried out, based on optical high-resolution échelle spectra obtained with UVES at the ESO VLT-UT2 Kueyen telescope. Results. A metallicity [Fe/H] = −0.20 dex is derived, together with α-element enhancement of Mg and Si ([Mg/Fe] = +0.28, [Si/Fe] = +0.21), solar Ca and Ti ([Ca/Fe]=+0.05, [Ti/Fe] = −0.01), and a mild enhancement of the r-process element Eu with [Eu/Fe]=+0.10. A mean heliocentric radial velocity of −1.86 km sˉ¹ is measured. We compare our results with previous investigations of the cluster.application/pdfengAstronomy and astrophysics. Vol. 460, no. 1 (Dec. 2006), p. 269-U212GaláxiasAglomerados estelares globularesAbundanciaEstrelas gigantesFotometriaEspectros estelaresStars: abundancesGlobular clusters: individual: NGC 6553Hertzsprung-Russell (HR) and C-M diagramsGalaxy: bulgeVLT-UVES abundance analysis of four giants in NGC 6553Estrangeiroinfo: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:UFRGSORIGINAL000595030.pdf000595030.pdfTexto completo (inglês)application/pdf500151http://www.lume.ufrgs.br/bitstream/10183/98983/1/000595030.pdfbc62647b6020d5685c5e9ed90d03d605MD51TEXT000595030.pdf.txt000595030.pdf.txtExtracted Texttext/plain48633http://www.lume.ufrgs.br/bitstream/10183/98983/2/000595030.pdf.txt48de3212d3dbd69c2ae2475224cfd95cMD52THUMBNAIL000595030.pdf.jpg000595030.pdf.jpgGenerated Thumbnailimage/jpeg1978http://www.lume.ufrgs.br/bitstream/10183/98983/3/000595030.pdf.jpg785ce7ec804ef4b961581ed99934e8bdMD5310183/989832023-05-14 03:25:01.964469oai:www.lume.ufrgs.br:10183/98983Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-05-14T06:25:01Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
VLT-UVES abundance analysis of four giants in NGC 6553 |
title |
VLT-UVES abundance analysis of four giants in NGC 6553 |
spellingShingle |
VLT-UVES abundance analysis of four giants in NGC 6553 Alves-Brito, Alan Galáxias Aglomerados estelares globulares Abundancia Estrelas gigantes Fotometria Espectros estelares Stars: abundances Globular clusters: individual: NGC 6553 Hertzsprung-Russell (HR) and C-M diagrams Galaxy: bulge |
title_short |
VLT-UVES abundance analysis of four giants in NGC 6553 |
title_full |
VLT-UVES abundance analysis of four giants in NGC 6553 |
title_fullStr |
VLT-UVES abundance analysis of four giants in NGC 6553 |
title_full_unstemmed |
VLT-UVES abundance analysis of four giants in NGC 6553 |
title_sort |
VLT-UVES abundance analysis of four giants in NGC 6553 |
author |
Alves-Brito, Alan |
author_facet |
Alves-Brito, Alan Barbuy, Beatriz Zoccali, Manuela Minniti, Dante Ortolani, Sergio Hill, Vanessa Renzini, Alvio Pasquini, Luca Bica, Eduardo Luiz Damiani Rich, Robert Michael Meléndez, Jorge Momany, Yazan |
author_role |
author |
author2 |
Barbuy, Beatriz Zoccali, Manuela Minniti, Dante Ortolani, Sergio Hill, Vanessa Renzini, Alvio Pasquini, Luca Bica, Eduardo Luiz Damiani Rich, Robert Michael Meléndez, Jorge Momany, Yazan |
author2_role |
author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Alves-Brito, Alan Barbuy, Beatriz Zoccali, Manuela Minniti, Dante Ortolani, Sergio Hill, Vanessa Renzini, Alvio Pasquini, Luca Bica, Eduardo Luiz Damiani Rich, Robert Michael Meléndez, Jorge Momany, Yazan |
dc.subject.por.fl_str_mv |
Galáxias Aglomerados estelares globulares Abundancia Estrelas gigantes Fotometria Espectros estelares |
topic |
Galáxias Aglomerados estelares globulares Abundancia Estrelas gigantes Fotometria Espectros estelares Stars: abundances Globular clusters: individual: NGC 6553 Hertzsprung-Russell (HR) and C-M diagrams Galaxy: bulge |
dc.subject.eng.fl_str_mv |
Stars: abundances Globular clusters: individual: NGC 6553 Hertzsprung-Russell (HR) and C-M diagrams Galaxy: bulge |
description |
Context. Metal-rich globular clusters trace the formation of bulges. Abundance ratios in the metal-rich globular clusters such as NGC 6553 can constrain the formation timescale of the Galactic bulge. Aims. The purpose of this study is to determine the metallicity and elemental ratios in individual stars of the metal-rich bulge globular cluster NGC 6553. Methods. A detailed abundance analysis of four giants in NGC 6553 is carried out, based on optical high-resolution échelle spectra obtained with UVES at the ESO VLT-UT2 Kueyen telescope. Results. A metallicity [Fe/H] = −0.20 dex is derived, together with α-element enhancement of Mg and Si ([Mg/Fe] = +0.28, [Si/Fe] = +0.21), solar Ca and Ti ([Ca/Fe]=+0.05, [Ti/Fe] = −0.01), and a mild enhancement of the r-process element Eu with [Eu/Fe]=+0.10. A mean heliocentric radial velocity of −1.86 km sˉ¹ is measured. We compare our results with previous investigations of the cluster. |
publishDate |
2006 |
dc.date.issued.fl_str_mv |
2006 |
dc.date.accessioned.fl_str_mv |
2014-07-31T02:05:12Z |
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Estrangeiro info:eu-repo/semantics/article |
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http://hdl.handle.net/10183/98983 |
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0004-6361 |
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000595030 |
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0004-6361 000595030 |
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http://hdl.handle.net/10183/98983 |
dc.language.iso.fl_str_mv |
eng |
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eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and astrophysics. Vol. 460, no. 1 (Dec. 2006), p. 269-U212 |
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openAccess |
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