New DA white dwarf evolutionary models and their pulsational properties

In this letter we investigate the pulsational properties of ZZ Ceti stars on the basis of new white dwarf evolutionary models calculated in a self-consistent way with the predictions of time dependent element diffusion and nuclear burning. In addition, full account is taken of the evolutionary stage...

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Autores principales: Córsico, Alejandro Hugo, Althaus, Leandro Gabriel, Benvenuto, Omar Gustavo, Serenelli, Aldo Marcelo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2001
Materias:
Ciencias Astronómicas
astrofísica
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/2059
http://www.aanda.org/index.php?option=com_article&access=standard&Itemid=129&url=/articles/aa/full/2001/46/aadi071/aadi071.html
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-2059
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
astrofísica
spellingShingle Ciencias Astronómicas
astrofísica
Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Benvenuto, Omar Gustavo
Serenelli, Aldo Marcelo
New DA white dwarf evolutionary models and their pulsational properties
topic_facet Ciencias Astronómicas
astrofísica
description In this letter we investigate the pulsational properties of ZZ Ceti stars on the basis of new white dwarf evolutionary models calculated in a self-consistent way with the predictions of time dependent element diffusion and nuclear burning. In addition, full account is taken of the evolutionary stages prior to the white dwarf formation. Emphasis is placed on the trapping properties of such models. By means of adiabatic, non-radial pulsation calculations, we find, as a result of time dependent diffusion, a much weaker mode trapping effect, particularly for the high-period regime of the pulsation g-spectrum. This result is valid at least for models with massive hydrogen-rich envelopes. Thus, mode trapping would not be an effective mechanism to explain the fact that all the high periods expected from standard models of stratified white dwarfs are not observed in the ZZ Ceti stars.
format Articulo
Articulo
author Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Benvenuto, Omar Gustavo
Serenelli, Aldo Marcelo
author_facet Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Benvenuto, Omar Gustavo
Serenelli, Aldo Marcelo
author_sort Córsico, Alejandro Hugo
title New DA white dwarf evolutionary models and their pulsational properties
title_short New DA white dwarf evolutionary models and their pulsational properties
title_full New DA white dwarf evolutionary models and their pulsational properties
title_fullStr New DA white dwarf evolutionary models and their pulsational properties
title_full_unstemmed New DA white dwarf evolutionary models and their pulsational properties
title_sort new da white dwarf evolutionary models and their pulsational properties
publishDate 2001
url http://sedici.unlp.edu.ar/handle/10915/2059
http://www.aanda.org/index.php?option=com_article&access=standard&Itemid=129&url=/articles/aa/full/2001/46/aadi071/aadi071.html
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AT serenellialdomarcelo newdawhitedwarfevolutionarymodelsandtheirpulsationalproperties
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