Repositório Digital

A- A A+

Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models

.

Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models

Mostrar registro completo

Estatísticas

Título Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
Autor Romero, Alejandra Daniela
Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Kepler, Souza Oliveira
Castanheira, Bárbara Garcia
Bertolami, Marcelo Miguel Miller
Abstract 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.
Contido em Monthly notices of the royal astronomical society. Oxford. Vol. 420, no. 2 (Feb. 2012), p. 1462-1480
Assunto Anãs brancas
Estrelas ZZ Ceti
Evolucao estelar
Interior estelar
Oscilacoes
[en] Astroseismology
[en] Stars: evolution
[en] Stars: individual: ZZ Ceti stars
[en] Stars: interiors
[en] Stars: oscillations
[en] White dwarfs
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/94423
Arquivos Descrição Formato
000826886.pdf (1.239Mb) Texto completo (inglês) Adobe PDF Visualizar/abrir

Este item está licenciado na Creative Commons License

Este item aparece na(s) seguinte(s) coleção(ões)


Mostrar registro completo

Percorrer



  • O autor é titular dos direitos autorais dos documentos disponíveis neste repositório e é vedada, nos termos da lei, a comercialização de qualquer espécie sem sua autorização prévia.
    Projeto gráfico elaborado pelo Caixola - Clube de Criação Fabico/UFRGS Powered by DSpace software, Version 1.8.1.