Asteroseismological study of massive ZZ CETI stars with fully evolutionary models

We present the first asteroseismological study for 42 massive ZZ Ceti stars based on a large set of fully evolutionary carbon-oxygen core DA white dwarf models characterized by a detailed and consistent chemical inner profile for the core and the envelope. Our sample comprises all of the ZZ Ceti sta...

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Detalles Bibliográficos
Autores principales: Romero, Alejandra Daniela, Kepler, S.O., Córsico, Alejandro Hugo, Althaus, Leandro Gabriel, Fraga, L.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Astronómicas
stars: evolution
stars: individual (ZZ Ceti stars)
stars: interiors
stars: oscillations
white dwarfs
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85096
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85096
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
stars: evolution
stars: individual (ZZ Ceti stars)
stars: interiors
stars: oscillations
white dwarfs
spellingShingle Ciencias Astronómicas
stars: evolution
stars: individual (ZZ Ceti stars)
stars: interiors
stars: oscillations
white dwarfs
Romero, Alejandra Daniela
Kepler, S.O.
Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Fraga, L.
Asteroseismological study of massive ZZ CETI stars with fully evolutionary models
topic_facet Ciencias Astronómicas
stars: evolution
stars: individual (ZZ Ceti stars)
stars: interiors
stars: oscillations
white dwarfs
description We present the first asteroseismological study for 42 massive ZZ Ceti stars based on a large set of fully evolutionary carbon-oxygen core DA white dwarf models characterized by a detailed and consistent chemical inner profile for the core and the envelope. Our sample comprises all of the ZZ Ceti stars with spectroscopic stellar masses between 0.72 and 1.05 M⊙ known to date. The asteroseismological analysis of a set of 42 stars enables study of the ensemble properties of the massive, pulsating white dwarf stars with carbon-oxygen cores, in particular the thickness of the hydrogen envelope and the stellar mass. A significant fraction of stars in our sample have stellar mass that is high enough to crystallize at the effective temperatures of the ZZ Ceti instability strip, which enables us to study the effects of crystallization on the pulsation properties of these stars. Our results show that the phase diagram presented in Horowitz et al. seems to be a good representation of the crystallization process inside white dwarf stars, in agreement with the results from white dwarf luminosity function in globular clusters.
format Articulo
Articulo
author Romero, Alejandra Daniela
Kepler, S.O.
Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Fraga, L.
author_facet Romero, Alejandra Daniela
Kepler, S.O.
Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Fraga, L.
author_sort Romero, Alejandra Daniela
title Asteroseismological study of massive ZZ CETI stars with fully evolutionary models
title_short Asteroseismological study of massive ZZ CETI stars with fully evolutionary models
title_full Asteroseismological study of massive ZZ CETI stars with fully evolutionary models
title_fullStr Asteroseismological study of massive ZZ CETI stars with fully evolutionary models
title_full_unstemmed Asteroseismological study of massive ZZ CETI stars with fully evolutionary models
title_sort asteroseismological study of massive zz ceti stars with fully evolutionary models
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/85096
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AT althausleandrogabriel asteroseismologicalstudyofmassivezzcetistarswithfullyevolutionarymodels
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