Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models

ZZ Ceti stars form the most numerous group of degenerate variable stars. They are otherwise normal DA (H-rich atmospheres) white dwarfs that exhibit pulsations. Here, we present an asteroseismological analysis for 44 bright ZZ Ceti stars based on a new set of fully evolutionary DA white dwarf models...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Romero, Alejandra Daniela, Córsico, Alejandro Hugo, Althaus, Leandro Gabriel, Kepler, S. O., Castanheira, B. G., Miller Bertolami, Marcelo Miguel
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2012
Materias:	Ciencias Astronómicas Astroseismology Stars: evolution Stars: individual: ZZCeti stars Stars: interiors Stars: oscillations White dwarfs
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/84684
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-84684
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 Astroseismology Stars: evolution Stars: individual: ZZCeti stars Stars: interiors Stars: oscillations White dwarfs
spellingShingle	Ciencias Astronómicas Astroseismology Stars: evolution Stars: individual: ZZCeti stars Stars: interiors Stars: oscillations White dwarfs Romero, Alejandra Daniela Córsico, Alejandro Hugo Althaus, Leandro Gabriel Kepler, S. O. Castanheira, B. G. Miller Bertolami, Marcelo Miguel Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
topic_facet	Ciencias Astronómicas Astroseismology Stars: evolution Stars: individual: ZZCeti stars Stars: interiors Stars: oscillations White dwarfs
description	ZZ Ceti stars form the most numerous group of degenerate variable stars. They are otherwise normal DA (H-rich atmospheres) white dwarfs that exhibit pulsations. Here, we present an asteroseismological analysis for 44 bright ZZ Ceti stars based on a new set of fully evolutionary DA white dwarf models characterized by detailed chemical profiles from the centre to the surface. One of our targets is the archetypal ZZ Ceti star G117-B15A, for which we obtain an asteroseismological model with an effective temperature and a surface gravity in excellent agreement with the spectroscopy. The asteroseismological analysis of a set of 44 ZZ Ceti stars has the potential to characterize the global properties of the class, in particular the thicknesses of the hydrogen envelope and the stellar masses. Our results support the belief that white dwarfs in the solar neighbourhood harbour a broad range of hydrogen-layer thickness.
format	Articulo Articulo
author	Romero, Alejandra Daniela Córsico, Alejandro Hugo Althaus, Leandro Gabriel Kepler, S. O. Castanheira, B. G. Miller Bertolami, Marcelo Miguel
author_facet	Romero, Alejandra Daniela Córsico, Alejandro Hugo Althaus, Leandro Gabriel Kepler, S. O. Castanheira, B. G. Miller Bertolami, Marcelo Miguel
author_sort	Romero, Alejandra Daniela
title	Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
title_short	Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
title_full	Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
title_fullStr	Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
title_full_unstemmed	Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
title_sort	toward ensemble asteroseismology of zz ceti stars with fully evolutionary models
publishDate	2012
url	http://sedici.unlp.edu.ar/handle/10915/84684
work_keys_str_mv	AT romeroalejandradaniela towardensembleasteroseismologyofzzcetistarswithfullyevolutionarymodels AT corsicoalejandrohugo towardensembleasteroseismologyofzzcetistarswithfullyevolutionarymodels AT althausleandrogabriel towardensembleasteroseismologyofzzcetistarswithfullyevolutionarymodels AT keplerso towardensembleasteroseismologyofzzcetistarswithfullyevolutionarymodels AT castanheirabg towardensembleasteroseismologyofzzcetistarswithfullyevolutionarymodels AT millerbertolamimarcelomiguel towardensembleasteroseismologyofzzcetistarswithfullyevolutionarymodels
bdutipo_str	Repositorios
_version_	1764820489102950401

Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models

Ejemplares similares