The rate of period change in pulsating DB white dwarf stars

In this work, we present the theoretically expected rates of pulsation period change for V777 Her (DBV) variable stars. To this end we employ new evolutionary models representative of pulsating DB white dwarf stars computed in a self-consistent way with the predictions of time-dependent element diff...

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Detalles Bibliográficos
Autores principales: Córsico, Alejandro Hugo, Althaus, Leandro Gabriel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2004
Materias:
Ciencias Astronómicas
Dense matter
Stars: evolution
Stars: oscillations
Stars: white dwarfs
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84337
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84337
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: evolution
Stars: oscillations
Stars: white dwarfs
spellingShingle Ciencias Astronómicas
Dense matter
Stars: evolution
Stars: oscillations
Stars: white dwarfs
Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
The rate of period change in pulsating DB white dwarf stars
topic_facet Ciencias Astronómicas
Dense matter
Stars: evolution
Stars: oscillations
Stars: white dwarfs
description In this work, we present the theoretically expected rates of pulsation period change for V777 Her (DBV) variable stars. To this end we employ new evolutionary models representative of pulsating DB white dwarf stars computed in a self-consistent way with the predictions of time-dependent element diffusion. At the hot edge of the DB instability strip, the envelopes of the models are characterized by a diffusion-induced double-layered chemical structure. We compute the numerical values of rates of period change by solving the equations of linear, adiabatic, nonradial stellar oscillations. We examine the effects of varying the stellar mass, the mass of the helium envelope and the neutrino emission on the expected period changes. We present extensive tabulations of our results which could be useful for comparison with future detections of the rate of period change in pulsating DB white dwarfs.
format Articulo
Articulo
author Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
author_facet Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
author_sort Córsico, Alejandro Hugo
title The rate of period change in pulsating DB white dwarf stars
title_short The rate of period change in pulsating DB white dwarf stars
title_full The rate of period change in pulsating DB white dwarf stars
title_fullStr The rate of period change in pulsating DB white dwarf stars
title_full_unstemmed The rate of period change in pulsating DB white dwarf stars
title_sort rate of period change in pulsating db white dwarf stars
publishDate 2004
url http://sedici.unlp.edu.ar/handle/10915/84337
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