Integrated spectra of Milky Way globular clusters

Detalhes bibliográficos
Autor(a) principal: Moura, Tatiana
Data de Publicação: 2019
Outros Autores: Trevisan, Marina, Barbuy, Beatriz, Rossi, Silvia
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/204124
Resumo: Integrated spectra of Milky Way globular clusters (GCs) are reproduced by computing synthetic spectra taking into account individual element abundances. Five clusters were selected from their location in the Galactic bulge, for which integrated spectra were available in the WiFeS Atlas of Galactic Globular Cluster Spectra project. Our aim is to further study the oldest GCs located in the Galactic bulge, with a metallicity in the range −1.6 < [Fe/H] < −0.7. We also include the halo cluster NGC 6752 for comparison purposes. We reproduce the full spectra in the range 4500–9000 Å available in these observed spectra, as well as individual lines of Na, Mg, Al, Si, Ca, Ti, Ba, and Eu. We report a list of lines that are suitable for abundance derivation, and by adopting these abundances, we are able to fit the damping parameters that define the wings of strong lines of well-known triplets of Mg i and Ca ii. Finally, the effect of multiple stellar populations through enhanced Na abundances is tested.
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spelling Moura, TatianaTrevisan, MarinaBarbuy, BeatrizRossi, Silvia2020-01-14T04:15:32Z20190004-637Xhttp://hdl.handle.net/10183/204124001108967Integrated spectra of Milky Way globular clusters (GCs) are reproduced by computing synthetic spectra taking into account individual element abundances. Five clusters were selected from their location in the Galactic bulge, for which integrated spectra were available in the WiFeS Atlas of Galactic Globular Cluster Spectra project. Our aim is to further study the oldest GCs located in the Galactic bulge, with a metallicity in the range −1.6 < [Fe/H] < −0.7. We also include the halo cluster NGC 6752 for comparison purposes. We reproduce the full spectra in the range 4500–9000 Å available in these observed spectra, as well as individual lines of Na, Mg, Al, Si, Ca, Ti, Ba, and Eu. We report a list of lines that are suitable for abundance derivation, and by adopting these abundances, we are able to fit the damping parameters that define the wings of strong lines of well-known triplets of Mg i and Ca ii. Finally, the effect of multiple stellar populations through enhanced Na abundances is tested.application/pdfengThe astrophysical journal. Bristol. Vol. 885, no. 1 (Nov. 2019), 28, 23 p.Aglomerados estelares globularesAtmosferas estelaresPopulacoes estelaresGalactic bulgeGlobular star clustersGalaxy abundancesStellar atmospheresStellar populationsIntegrated spectra of Milky Way globular 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:UFRGSTEXT001108967.pdf.txt001108967.pdf.txtExtracted Texttext/plain49625http://www.lume.ufrgs.br/bitstream/10183/204124/2/001108967.pdf.txt6c05b655162f2b77b158ac27d2f31ebfMD52ORIGINAL001108967.pdfTexto completo (inglês)application/pdf2877931http://www.lume.ufrgs.br/bitstream/10183/204124/1/001108967.pdf58af5540104b9ca5811a59f84f2cc442MD5110183/2041242023-08-11 03:52:55.26363oai:www.lume.ufrgs.br:10183/204124Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-08-11T06:52:55Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Integrated spectra of Milky Way globular clusters
title Integrated spectra of Milky Way globular clusters
spellingShingle Integrated spectra of Milky Way globular clusters
Moura, Tatiana
Aglomerados estelares globulares
Atmosferas estelares
Populacoes estelares
Galactic bulge
Globular star clusters
Galaxy abundances
Stellar atmospheres
Stellar populations
title_short Integrated spectra of Milky Way globular clusters
title_full Integrated spectra of Milky Way globular clusters
title_fullStr Integrated spectra of Milky Way globular clusters
title_full_unstemmed Integrated spectra of Milky Way globular clusters
title_sort Integrated spectra of Milky Way globular clusters
author Moura, Tatiana
author_facet Moura, Tatiana
Trevisan, Marina
Barbuy, Beatriz
Rossi, Silvia
author_role author
author2 Trevisan, Marina
Barbuy, Beatriz
Rossi, Silvia
author2_role author
author
author
dc.contributor.author.fl_str_mv Moura, Tatiana
Trevisan, Marina
Barbuy, Beatriz
Rossi, Silvia
dc.subject.por.fl_str_mv Aglomerados estelares globulares
Atmosferas estelares
Populacoes estelares
topic Aglomerados estelares globulares
Atmosferas estelares
Populacoes estelares
Galactic bulge
Globular star clusters
Galaxy abundances
Stellar atmospheres
Stellar populations
dc.subject.eng.fl_str_mv Galactic bulge
Globular star clusters
Galaxy abundances
Stellar atmospheres
Stellar populations
description Integrated spectra of Milky Way globular clusters (GCs) are reproduced by computing synthetic spectra taking into account individual element abundances. Five clusters were selected from their location in the Galactic bulge, for which integrated spectra were available in the WiFeS Atlas of Galactic Globular Cluster Spectra project. Our aim is to further study the oldest GCs located in the Galactic bulge, with a metallicity in the range −1.6 < [Fe/H] < −0.7. We also include the halo cluster NGC 6752 for comparison purposes. We reproduce the full spectra in the range 4500–9000 Å available in these observed spectra, as well as individual lines of Na, Mg, Al, Si, Ca, Ti, Ba, and Eu. We report a list of lines that are suitable for abundance derivation, and by adopting these abundances, we are able to fit the damping parameters that define the wings of strong lines of well-known triplets of Mg i and Ca ii. Finally, the effect of multiple stellar populations through enhanced Na abundances is tested.
publishDate 2019
dc.date.issued.fl_str_mv 2019
dc.date.accessioned.fl_str_mv 2020-01-14T04:15:32Z
dc.type.driver.fl_str_mv Estrangeiro
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/204124
dc.identifier.issn.pt_BR.fl_str_mv 0004-637X
dc.identifier.nrb.pt_BR.fl_str_mv 001108967
identifier_str_mv 0004-637X
001108967
url http://hdl.handle.net/10183/204124
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv The astrophysical journal. Bristol. Vol. 885, no. 1 (Nov. 2019), 28, 23 p.
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eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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reponame_str Repositório Institucional da UFRGS
collection Repositório Institucional da UFRGS
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