Asteroseismic inferences on GW Virginis variable stars in the frame of new PG 1159 evolutionary models

An adiabatic, nonradial pulsation study of GW Vir stars is presented. The pulsation calculations were based on PG 1159 evolutionary sequences with different stellar masses artificially derived from a full evolutionary sequence of 0.5895 M⊙ that has been computed by taking the evolutionary history of...

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Autores principales: Córsico, Alejandro Hugo, Althaus, Leandro Gabriel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2006
Materias:
Ciencias Astronómicas
Dense matter
Stars: oscillations
Stars: white dwarfs
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83221
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83221
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
Dense matter
Stars: oscillations
Stars: white dwarfs
spellingShingle Ciencias Astronómicas
Dense matter
Stars: oscillations
Stars: white dwarfs
Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Asteroseismic inferences on GW Virginis variable stars in the frame of new PG 1159 evolutionary models
topic_facet Ciencias Astronómicas
Dense matter
Stars: oscillations
Stars: white dwarfs
description An adiabatic, nonradial pulsation study of GW Vir stars is presented. The pulsation calculations were based on PG 1159 evolutionary sequences with different stellar masses artificially derived from a full evolutionary sequence of 0.5895 M⊙ that has been computed by taking the evolutionary history of the progenitor star into account. The artificial sequences were constructed by appropriately scaling the stellar mass of the 0.5895-M ⊙ sequence well before the models reached the low-luminosity, high-gravity stage of the GW Vir domain. We computed g-mode pulsation periods appropriate to GW Vir variable stars. The implications for the mode-trapping properties of our PG 1159 models are discussed at length. We found that the mode-trapping features characterizing our PG 1159 models are mostly fixed by the stepped shape of the core chemical profile left by prior convective overshooting. This is particularly true at least for the range of periods observed in GW Vir stars. In addition, we make asteroseismic inferences about the internal structure of the GW Vir stars PG 1159-035, PG 2131+066, PG 1707+427, and PG 0122+200.
format Articulo
Articulo
author Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
author_facet Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
author_sort Córsico, Alejandro Hugo
title Asteroseismic inferences on GW Virginis variable stars in the frame of new PG 1159 evolutionary models
title_short Asteroseismic inferences on GW Virginis variable stars in the frame of new PG 1159 evolutionary models
title_full Asteroseismic inferences on GW Virginis variable stars in the frame of new PG 1159 evolutionary models
title_fullStr Asteroseismic inferences on GW Virginis variable stars in the frame of new PG 1159 evolutionary models
title_full_unstemmed Asteroseismic inferences on GW Virginis variable stars in the frame of new PG 1159 evolutionary models
title_sort asteroseismic inferences on gw virginis variable stars in the frame of new pg 1159 evolutionary models
publishDate 2006
url http://sedici.unlp.edu.ar/handle/10915/83221
work_keys_str_mv AT corsicoalejandrohugo asteroseismicinferencesongwvirginisvariablestarsintheframeofnewpg1159evolutionarymodels
AT althausleandrogabriel asteroseismicinferencesongwvirginisvariablestarsintheframeofnewpg1159evolutionarymodels
bdutipo_str Repositorios
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