Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models

Detalhes bibliográficos
Autor(a) principal: Romero, Alejandra Daniela
Data de Publicação: 2012
Outros Autores: Córsico, Alejandro Hugo, Althaus, Leandro Gabriel, Kepler, Souza Oliveira, Castanheira, Bárbara Garcia, Bertolami, Marcelo Miguel Miller
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/94423
Resumo: ZZ Ceti stars form the most numerous group of degenerate variable stars. They are otherwise normal DA (H-rich atmospheres) white dwarfs that exhibit pulsations. Here, we present an asteroseismological analysis for 44 bright ZZ Ceti stars based on a newset of fully evolutionary DA white dwarf models characterized by detailed chemical profiles from the centre to the surface. One of our targets is the archetypal ZZ Ceti star G117−B15A, for which we obtain an asteroseismological model with an effective temperature and a surface gravity in excellent agreement with the spectroscopy. The asteroseismological analysis of a set of 44 ZZ Ceti stars has the potential to characterize the global properties of the class, in particular the thicknesses of the hydrogen envelope and the stellar masses. Our results support the belief that white dwarfs in the solar neighbourhood harbour a broad range of hydrogen-layer thickness.
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spelling Romero, Alejandra DanielaCórsico, Alejandro HugoAlthaus, Leandro GabrielKepler, Souza OliveiraCastanheira, Bárbara GarciaBertolami, Marcelo Miguel Miller2014-04-16T01:52:26Z20120035-8711http://hdl.handle.net/10183/94423000826886ZZ Ceti stars form the most numerous group of degenerate variable stars. They are otherwise normal DA (H-rich atmospheres) white dwarfs that exhibit pulsations. Here, we present an asteroseismological analysis for 44 bright ZZ Ceti stars based on a newset of fully evolutionary DA white dwarf models characterized by detailed chemical profiles from the centre to the surface. One of our targets is the archetypal ZZ Ceti star G117−B15A, for which we obtain an asteroseismological model with an effective temperature and a surface gravity in excellent agreement with the spectroscopy. The asteroseismological analysis of a set of 44 ZZ Ceti stars has the potential to characterize the global properties of the class, in particular the thicknesses of the hydrogen envelope and the stellar masses. Our results support the belief that white dwarfs in the solar neighbourhood harbour a broad range of hydrogen-layer thickness.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 420, no. 2 (Feb. 2012), p. 1462-1480Estrelas ZZ CetiEvolucao estelarInterior estelarAnãs brancasOscilacoesAstroseismologyStars: evolutionStars: individual: ZZ Ceti starsStars: interiorsStars: oscillationsWhite dwarfsToward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary modelsEstrangeiroinfo: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:UFRGSORIGINAL000826886.pdf000826886.pdfTexto completo (inglês)application/pdf1239681http://www.lume.ufrgs.br/bitstream/10183/94423/1/000826886.pdfbc159a6e0603a49465f12a899321ab6bMD51TEXT000826886.pdf.txt000826886.pdf.txtExtracted Texttext/plain109243http://www.lume.ufrgs.br/bitstream/10183/94423/2/000826886.pdf.txt9de786fd1f161f8f5c1d1328105e59ccMD52THUMBNAIL000826886.pdf.jpg000826886.pdf.jpgGenerated Thumbnailimage/jpeg2048http://www.lume.ufrgs.br/bitstream/10183/94423/3/000826886.pdf.jpgac9e1d1ae7ab30590d0e8ce1641e7716MD5310183/944232023-05-14 03:24:42.2232oai:www.lume.ufrgs.br:10183/94423Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-05-14T06:24:42Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
title Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
spellingShingle Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
Romero, Alejandra Daniela
Estrelas ZZ Ceti
Evolucao estelar
Interior estelar
Anãs brancas
Oscilacoes
Astroseismology
Stars: evolution
Stars: individual: ZZ Ceti stars
Stars: interiors
Stars: oscillations
White dwarfs
title_short Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
title_full Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
title_fullStr Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
title_full_unstemmed Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
title_sort Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
author Romero, Alejandra Daniela
author_facet Romero, Alejandra Daniela
Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Kepler, Souza Oliveira
Castanheira, Bárbara Garcia
Bertolami, Marcelo Miguel Miller
author_role author
author2 Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Kepler, Souza Oliveira
Castanheira, Bárbara Garcia
Bertolami, Marcelo Miguel Miller
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Romero, Alejandra Daniela
Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Kepler, Souza Oliveira
Castanheira, Bárbara Garcia
Bertolami, Marcelo Miguel Miller
dc.subject.por.fl_str_mv Estrelas ZZ Ceti
Evolucao estelar
Interior estelar
Anãs brancas
Oscilacoes
topic Estrelas ZZ Ceti
Evolucao estelar
Interior estelar
Anãs brancas
Oscilacoes
Astroseismology
Stars: evolution
Stars: individual: ZZ Ceti stars
Stars: interiors
Stars: oscillations
White dwarfs
dc.subject.eng.fl_str_mv Astroseismology
Stars: evolution
Stars: individual: ZZ Ceti stars
Stars: interiors
Stars: oscillations
White dwarfs
description ZZ Ceti stars form the most numerous group of degenerate variable stars. They are otherwise normal DA (H-rich atmospheres) white dwarfs that exhibit pulsations. Here, we present an asteroseismological analysis for 44 bright ZZ Ceti stars based on a newset of fully evolutionary DA white dwarf models characterized by detailed chemical profiles from the centre to the surface. One of our targets is the archetypal ZZ Ceti star G117−B15A, for which we obtain an asteroseismological model with an effective temperature and a surface gravity in excellent agreement with the spectroscopy. The asteroseismological analysis of a set of 44 ZZ Ceti stars has the potential to characterize the global properties of the class, in particular the thicknesses of the hydrogen envelope and the stellar masses. Our results support the belief that white dwarfs in the solar neighbourhood harbour a broad range of hydrogen-layer thickness.
publishDate 2012
dc.date.issued.fl_str_mv 2012
dc.date.accessioned.fl_str_mv 2014-04-16T01:52:26Z
dc.type.driver.fl_str_mv Estrangeiro
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/94423
dc.identifier.issn.pt_BR.fl_str_mv 0035-8711
dc.identifier.nrb.pt_BR.fl_str_mv 000826886
identifier_str_mv 0035-8711
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url http://hdl.handle.net/10183/94423
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Monthly notices of the royal astronomical society. Oxford. Vol. 420, no. 2 (Feb. 2012), p. 1462-1480
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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reponame_str Repositório Institucional da UFRGS
collection Repositório Institucional da UFRGS
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