H II region age indicators

Detalhes bibliográficos
Autor(a) principal: Copetti, Marcus Vinicius Fontana
Data de Publicação: 1986
Outros Autores: Pastoriza, Miriani Griselda, Dottori, Horacio Alberto
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/98358
Resumo: The evolution of some properties of H II regions such as the relative volume R of the He⁺ and H⁺ zones, the equivalent width Wнβ of the Hβ emission line and the ratio [O III]/Hβ of the lines [O II] λλ4959, 5007 to Hβ, was studied through models which take into account: a single burst for the formation of the ionizing association with different initial mass function IMF (1 ≤ x ≤ 3) and upper stellar mass limits (30 ≤ Mu/Mѳ ≤ 120); different chemical composition models of stellar evolution with and without mass loss. It was found that Wнβ, R and [OIII]/Hβ decrease monotonically as a function of time and consequently they are good H II region age indicators.
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spelling Copetti, Marcus Vinicius FontanaPastoriza, Miriani GriseldaDottori, Horacio Alberto2014-07-22T02:03:36Z19860004-6361http://hdl.handle.net/10183/98358000112961The evolution of some properties of H II regions such as the relative volume R of the He⁺ and H⁺ zones, the equivalent width Wнβ of the Hβ emission line and the ratio [O III]/Hβ of the lines [O II] λλ4959, 5007 to Hβ, was studied through models which take into account: a single burst for the formation of the ionizing association with different initial mass function IMF (1 ≤ x ≤ 3) and upper stellar mass limits (30 ≤ Mu/Mѳ ≤ 120); different chemical composition models of stellar evolution with and without mass loss. It was found that Wнβ, R and [OIII]/Hβ decrease monotonically as a function of time and consequently they are good H II region age indicators.application/pdfengAstronomy and astrophysics. Berlin. Vol. 156, no. 1/2 (Feb. 1986), p. 111-120Astrofisica extragalaticaRegiões HIIIonizaçãoH II regionsEvolution modelsAge determinationH II region age indicatorsEstrangeiroinfo: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:UFRGSORIGINAL000112961.pdf000112961.pdfTexto completo (inglês)application/pdf787193http://www.lume.ufrgs.br/bitstream/10183/98358/1/000112961.pdf2041d312fda9c4b5370b60700841374dMD51TEXT000112961.pdf.txt000112961.pdf.txtExtracted Texttext/plain29348http://www.lume.ufrgs.br/bitstream/10183/98358/2/000112961.pdf.txt3f8f21394b25f0791f0ba84616c2f377MD52THUMBNAIL000112961.pdf.jpg000112961.pdf.jpgGenerated Thumbnailimage/jpeg1897http://www.lume.ufrgs.br/bitstream/10183/98358/3/000112961.pdf.jpg6a7694cdd58b0f9a4df8f0b26b936afcMD5310183/983582024-09-07 06:19:16.290119oai:www.lume.ufrgs.br:10183/98358Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-09-07T09:19:16Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv H II region age indicators
title H II region age indicators
spellingShingle H II region age indicators
Copetti, Marcus Vinicius Fontana
Astrofisica extragalatica
Regiões HII
Ionização
H II regions
Evolution models
Age determination
title_short H II region age indicators
title_full H II region age indicators
title_fullStr H II region age indicators
title_full_unstemmed H II region age indicators
title_sort H II region age indicators
author Copetti, Marcus Vinicius Fontana
author_facet Copetti, Marcus Vinicius Fontana
Pastoriza, Miriani Griselda
Dottori, Horacio Alberto
author_role author
author2 Pastoriza, Miriani Griselda
Dottori, Horacio Alberto
author2_role author
author
dc.contributor.author.fl_str_mv Copetti, Marcus Vinicius Fontana
Pastoriza, Miriani Griselda
Dottori, Horacio Alberto
dc.subject.por.fl_str_mv Astrofisica extragalatica
Regiões HII
Ionização
topic Astrofisica extragalatica
Regiões HII
Ionização
H II regions
Evolution models
Age determination
dc.subject.eng.fl_str_mv H II regions
Evolution models
Age determination
description The evolution of some properties of H II regions such as the relative volume R of the He⁺ and H⁺ zones, the equivalent width Wнβ of the Hβ emission line and the ratio [O III]/Hβ of the lines [O II] λλ4959, 5007 to Hβ, was studied through models which take into account: a single burst for the formation of the ionizing association with different initial mass function IMF (1 ≤ x ≤ 3) and upper stellar mass limits (30 ≤ Mu/Mѳ ≤ 120); different chemical composition models of stellar evolution with and without mass loss. It was found that Wнβ, R and [OIII]/Hβ decrease monotonically as a function of time and consequently they are good H II region age indicators.
publishDate 1986
dc.date.issued.fl_str_mv 1986
dc.date.accessioned.fl_str_mv 2014-07-22T02:03:36Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/98358
dc.identifier.issn.pt_BR.fl_str_mv 0004-6361
dc.identifier.nrb.pt_BR.fl_str_mv 000112961
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url http://hdl.handle.net/10183/98358
dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Astronomy and astrophysics. Berlin. Vol. 156, no. 1/2 (Feb. 1986), p. 111-120
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reponame_str Repositório Institucional da UFRGS
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