Journal ArticleDOI
Evolution of the pulsation properties of hot pre-white dwarf stars.
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In this article, the authors propose resolution des equations d'oscillations adiabatiques, lineaires non radiales, for des modeles de pre-naine blanche.Abstract:
Resolution des equations d'oscillations adiabatiques, lineaires non radiales, pour des modeles de pre-naine blancheread more
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Journal ArticleDOI
The rate of cooling of the pulsating white dwarf star G117$-$B15A: a new asteroseismological inference of the axion mass
Alejandro H. Córsico,Leandro Gabriel Althaus,M. M. Miller Bertolami,Alejandra D. Romero,Enrique García-Berro,Jordi Isern,Souza Oliveira Kepler +6 more
TL;DR: In this paper, the authors employ a state-of-the-art asteroseismological model of G117-B15A, the archetype of the H-rich atmosphere (DA) white dwarf pulsators, and use the most recently measured value of the rate of period change for the dominant mode of this pulsating star to derive a new constraint on the mass of axion, the still conjectural nonbarionic particle considered as candidate for dark matter of the Universe.
Journal ArticleDOI
Asteroseismic inferences on GW virginis variable stars in the frame of new PG 1159 evolutionary models
TL;DR: In this paper, an adiabatic, nonradial pulsation study of GW Vir stars is presented 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.
Journal ArticleDOI
The rate of cooling of the pulsating white dwarf star G117−B15A: a new asteroseismological inference of the axion mass
Alejandro H. Córsico,Alejandro H. Córsico,Leandro Gabriel Althaus,Leandro Gabriel Althaus,M. M. Miller Bertolami,M. M. Miller Bertolami,Alejandra D. Romero,Alejandra D. Romero,E. García–Berro,Jordi Isern,Souza Oliveira Kepler +10 more
TL;DR: In this article, the authors employ a state-of-the-art asteroseismological model of G117−B15A, the archetype of the H-rich atmosphere (DA) white dwarf pulsators, and use the most recently measured value of the rate of period change for the dominant mode of this pulsating star to derive a new constraint on the mass of axion, the still conjectural nonbarionic particle considered as candidate for darkmatter of the Universe.
Journal ArticleDOI
New evolutionary models for massive ZZ Ceti stars. I. First results for their pulsational properties
TL;DR: In this article, the authors presented new and improved evolutionary calculations for carbon-oxygen white dwarf (WD) stars appropriate for the study of massive ZZ Ceti stars, where they followed the complete evolution of massive WD progenitors from the zero-age main sequence through the thermally pulsing and mass loss phases to the WD regime.
Journal ArticleDOI
Adiabatic Survey of Subdwarf B Star Oscillations. I. Pulsation Properties of a Representative Evolutionary Model
TL;DR: In this article, an adiabatic pulsation code is used to compute, in the 80-1500 s period window, the radial (l = 0) and non-radial (from l = 1 up to l = 3) oscillation modes for a representative evolutionary model of subdwarf B stars.
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