Revisiting the theoretical DBV (V777 Her) instability strip: The MLT theory of convection

We reexamine the theoretical instability domain of pulsating DB white dwarfs (DBV or V777 Her variables). We performed an extensive g-mode nonadiabatic pulsation analysis of DB evolutionary models considering a wide range of stellar masses, for which the complete evolutionary stages of their progeni...

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Autores principales: Córsico, Alejandro Hugo, Althaus, Leandro Gabriel, Miller Bertolami, Marcelo Miguel, García Berro, E.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2009
Materias:
Ciencias Astronómicas
Estrellas Celestiales
Enanas blancas
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82792
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-82792
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
Estrellas Celestiales
Enanas blancas
spellingShingle Ciencias Astronómicas
Estrellas Celestiales
Enanas blancas
Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Miller Bertolami, Marcelo Miguel
García Berro, E.
Revisiting the theoretical DBV (V777 Her) instability strip: The MLT theory of convection
topic_facet Ciencias Astronómicas
Estrellas Celestiales
Enanas blancas
description We reexamine the theoretical instability domain of pulsating DB white dwarfs (DBV or V777 Her variables). We performed an extensive g-mode nonadiabatic pulsation analysis of DB evolutionary models considering a wide range of stellar masses, for which the complete evolutionary stages of their progenitors from the ZAMS, through the thermally pulsing AGB and born-again phases, the domain of the PG1159 stars, the hot phase of DO white dwarfs, and then the DB white dwarf stage have been considered. We explicitly account for the evolution of the chemical abundance distribution due to time-dependent chemical diffusion processes. We examine the impact of the different prescriptions of the MLT theory of convection and the effects of small amounts of H in the almost He-pure atmospheres of DB stars on the precise location of the theoretical blue edge of the DBV instability strip.
format Articulo
Articulo
author Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Miller Bertolami, Marcelo Miguel
García Berro, E.
author_facet Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Miller Bertolami, Marcelo Miguel
García Berro, E.
author_sort Córsico, Alejandro Hugo
title Revisiting the theoretical DBV (V777 Her) instability strip: The MLT theory of convection
title_short Revisiting the theoretical DBV (V777 Her) instability strip: The MLT theory of convection
title_full Revisiting the theoretical DBV (V777 Her) instability strip: The MLT theory of convection
title_fullStr Revisiting the theoretical DBV (V777 Her) instability strip: The MLT theory of convection
title_full_unstemmed Revisiting the theoretical DBV (V777 Her) instability strip: The MLT theory of convection
title_sort revisiting the theoretical dbv (v777 her) instability strip: the mlt theory of convection
publishDate 2009
url http://sedici.unlp.edu.ar/handle/10915/82792
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AT millerbertolamimarcelomiguel revisitingthetheoreticaldbvv777herinstabilitystripthemlttheoryofconvection
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