New theories of convection in the context of a recent analysis of the DBV white dwarf GD 358

We present updated evolutionary calculations for carbon-oxygen DB white dwarfs using the self-consistent model for turbulent convection recently developed by Canuto, Goldman & Mazzitelli (CGM). To this end, we employ a detailed stellar evolutionary code in which we include a new equation of stat...

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Detalles Bibliográficos
Autores principales: Althaus, Leandro Gabriel, Benvenuto, Omar Gustavo
Formato: Articulo
Lenguaje:Inglés
Publicado: 1997
Materias:
Física
Astronomía
convection
stars: individual: GD 358
white dwarfs
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/145056
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-145056
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Astronomía
convection
stars: individual: GD 358
white dwarfs
spellingShingle Física
Astronomía
convection
stars: individual: GD 358
white dwarfs
Althaus, Leandro Gabriel
Benvenuto, Omar Gustavo
New theories of convection in the context of a recent analysis of the DBV white dwarf GD 358
topic_facet Física
Astronomía
convection
stars: individual: GD 358
white dwarfs
description We present updated evolutionary calculations for carbon-oxygen DB white dwarfs using the self-consistent model for turbulent convection recently developed by Canuto, Goldman & Mazzitelli (CGM). To this end, we employ a detailed stellar evolutionary code in which we include a new equation of state for helium plasmas computed by Saumon, Chabrier & Van Horn as well as new OPAL radiative opacities. The present study is aimed at assessing the compatibility of the CGM model with the recent effective temperature redetermination of the pulsating DB white dwarf star GD 358. This star defines the blue edge of the DB white dwarf instability strip. Using thermal time-scale arguments, we find that the DB blue edges given by the CGM fit to the effective temperature of GD 358 are much better than those given by the previous Canuto & Mazzitelli model.
format Articulo
Articulo
author Althaus, Leandro Gabriel
Benvenuto, Omar Gustavo
author_facet Althaus, Leandro Gabriel
Benvenuto, Omar Gustavo
author_sort Althaus, Leandro Gabriel
title New theories of convection in the context of a recent analysis of the DBV white dwarf GD 358
title_short New theories of convection in the context of a recent analysis of the DBV white dwarf GD 358
title_full New theories of convection in the context of a recent analysis of the DBV white dwarf GD 358
title_fullStr New theories of convection in the context of a recent analysis of the DBV white dwarf GD 358
title_full_unstemmed New theories of convection in the context of a recent analysis of the DBV white dwarf GD 358
title_sort new theories of convection in the context of a recent analysis of the dbv white dwarf gd 358
publishDate 1997
url http://sedici.unlp.edu.ar/handle/10915/145056
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