An asteroseismic constraint on the mass of the axion from the period drift of the pulsating DA white dwarf star L19-2

We employ an asteroseismic model of L19-2, a relatively massive M? ∼ 0.75M and hot (Teff ∼ 12 100 K) pulsating DA (H-rich atmosphere) white dwarf star (DAV or ZZ Ceti variable), and use the observed values of the temporal rates of period change of its dominant pulsation modes (Π ∼ 113 s and Π ∼ 19...

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Detalles Bibliográficos
Autores principales: Córsico, Alejandro Hugo, Romero, Alejandra Daniela, Althaus, Leandro Gabriel, García Berro, Enrique, Isern, Jordi, Kepler, S. O., Miller Bertolami, Marcelo Miguel, Sullivan, Denis J., Chote, Paul
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Astronomía
Axions
Stars
White dwarfs
Brown dwarfs
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/93643
http://iopscience.iop.org/article/10.1088/1475-7516/2016/07/036/meta
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-93643
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Astronomía
Axions
Stars
White dwarfs
Brown dwarfs
spellingShingle Astronomía
Axions
Stars
White dwarfs
Brown dwarfs
Córsico, Alejandro Hugo
Romero, Alejandra Daniela
Althaus, Leandro Gabriel
García Berro, Enrique
Isern, Jordi
Kepler, S. O.
Miller Bertolami, Marcelo Miguel
Sullivan, Denis J.
Chote, Paul
An asteroseismic constraint on the mass of the axion from the period drift of the pulsating DA white dwarf star L19-2
topic_facet Astronomía
Axions
Stars
White dwarfs
Brown dwarfs
description We employ an asteroseismic model of L19-2, a relatively massive M? ∼ 0.75M and hot (Teff ∼ 12 100 K) pulsating DA (H-rich atmosphere) white dwarf star (DAV or ZZ Ceti variable), and use the observed values of the temporal rates of period change of its dominant pulsation modes (Π ∼ 113 s and Π ∼ 192 s), to derive a new constraint on the mass of the axion, the hypothetical non-barionic particle considered as a possible component of the dark matter of the Universe. If the asteroseismic model employed is an accurate representation of L19-2, then our results indicate hints of extra cooling in this star, compatible with emission of axions of mass ma cos2 β . 25 meV or an axion-electron coupling constant of gae . 7×10−13
format Articulo
Articulo
author Córsico, Alejandro Hugo
Romero, Alejandra Daniela
Althaus, Leandro Gabriel
García Berro, Enrique
Isern, Jordi
Kepler, S. O.
Miller Bertolami, Marcelo Miguel
Sullivan, Denis J.
Chote, Paul
author_facet Córsico, Alejandro Hugo
Romero, Alejandra Daniela
Althaus, Leandro Gabriel
García Berro, Enrique
Isern, Jordi
Kepler, S. O.
Miller Bertolami, Marcelo Miguel
Sullivan, Denis J.
Chote, Paul
author_sort Córsico, Alejandro Hugo
title An asteroseismic constraint on the mass of the axion from the period drift of the pulsating DA white dwarf star L19-2
title_short An asteroseismic constraint on the mass of the axion from the period drift of the pulsating DA white dwarf star L19-2
title_full An asteroseismic constraint on the mass of the axion from the period drift of the pulsating DA white dwarf star L19-2
title_fullStr An asteroseismic constraint on the mass of the axion from the period drift of the pulsating DA white dwarf star L19-2
title_full_unstemmed An asteroseismic constraint on the mass of the axion from the period drift of the pulsating DA white dwarf star L19-2
title_sort asteroseismic constraint on the mass of the axion from the period drift of the pulsating da white dwarf star l19-2
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/93643
http://iopscience.iop.org/article/10.1088/1475-7516/2016/07/036/meta
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