Probing the internal rotation of pre-white dwarf stars with asteroseismology: the case of PG 0122+200

Autores
Córsico, Alejandro Hugo; Althaus, Leandro Gabriel; Kawaler, S. D.; Miller Bertolami, Marcelo Miguel; García Berro, E.; Kepler, S. O.
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We put asteroseismological constraints on the internal rotation profile of the GW Vir (PG1159-type) star PG 0122+200. To this end we employ a state-of-the-art asteroseismological model for this star and assess the expected frequency splittings induced by rotation adopting a forward approach in which we compare the theoretical frequency separations with the observed ones assuming different types of plausible internal rotation profiles. We also employ two asteroseismological inversion methods for the inversion of the rotation profile of PG 0122+200. We find evidence for differential rotation in this star. We demonstrate that the frequency splittings of the rotational multiplets exhibited by PG 0122+200 are compatible with a rotation profile in which the central regions are spinning about 2.4 times faster than the stellar surface.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
Materia
Ciencias Astronómicas
Stars: evolution
Stars: individual: PG 0122+200
Stars: interiors
Stars: oscillations
Stars: rotation
White dwarfs
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/84856
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/84856
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Probing the internal rotation of pre-white dwarf stars with asteroseismology: the case of PG 0122+200Córsico, Alejandro HugoAlthaus, Leandro GabrielKawaler, S. D.Miller Bertolami, Marcelo MiguelGarcía Berro, E.Kepler, S. O.Ciencias AstronómicasStars: evolutionStars: individual: PG 0122+200Stars: interiorsStars: oscillationsStars: rotationWhite dwarfsWe put asteroseismological constraints on the internal rotation profile of the GW Vir (PG1159-type) star PG 0122+200. To this end we employ a state-of-the-art asteroseismological model for this star and assess the expected frequency splittings induced by rotation adopting a forward approach in which we compare the theoretical frequency separations with the observed ones assuming different types of plausible internal rotation profiles. We also employ two asteroseismological inversion methods for the inversion of the rotation profile of PG 0122+200. We find evidence for differential rotation in this star. We demonstrate that the frequency splittings of the rotational multiplets exhibited by PG 0122+200 are compatible with a rotation profile in which the central regions are spinning about 2.4 times faster than the stellar surface.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plata2011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf2519-2526http://sedici.unlp.edu.ar/handle/10915/84856enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2011.19642.xinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:16:06Zoai:sedici.unlp.edu.ar:10915/84856Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:06.334SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Probing the internal rotation of pre-white dwarf stars with asteroseismology: the case of PG 0122+200
title Probing the internal rotation of pre-white dwarf stars with asteroseismology: the case of PG 0122+200
spellingShingle Probing the internal rotation of pre-white dwarf stars with asteroseismology: the case of PG 0122+200
Córsico, Alejandro Hugo
Ciencias Astronómicas
Stars: evolution
Stars: individual: PG 0122+200
Stars: interiors
Stars: oscillations
Stars: rotation
White dwarfs
title_short Probing the internal rotation of pre-white dwarf stars with asteroseismology: the case of PG 0122+200
title_full Probing the internal rotation of pre-white dwarf stars with asteroseismology: the case of PG 0122+200
title_fullStr Probing the internal rotation of pre-white dwarf stars with asteroseismology: the case of PG 0122+200
title_full_unstemmed Probing the internal rotation of pre-white dwarf stars with asteroseismology: the case of PG 0122+200
title_sort Probing the internal rotation of pre-white dwarf stars with asteroseismology: the case of PG 0122+200
dc.creator.none.fl_str_mv Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Kawaler, S. D.
Miller Bertolami, Marcelo Miguel
García Berro, E.
Kepler, S. O.
author Córsico, Alejandro Hugo
author_facet Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
Kawaler, S. D.
Miller Bertolami, Marcelo Miguel
García Berro, E.
Kepler, S. O.
author_role author
author2 Althaus, Leandro Gabriel
Kawaler, S. D.
Miller Bertolami, Marcelo Miguel
García Berro, E.
Kepler, S. O.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Stars: evolution
Stars: individual: PG 0122+200
Stars: interiors
Stars: oscillations
Stars: rotation
White dwarfs
topic Ciencias Astronómicas
Stars: evolution
Stars: individual: PG 0122+200
Stars: interiors
Stars: oscillations
Stars: rotation
White dwarfs
dc.description.none.fl_txt_mv We put asteroseismological constraints on the internal rotation profile of the GW Vir (PG1159-type) star PG 0122+200. To this end we employ a state-of-the-art asteroseismological model for this star and assess the expected frequency splittings induced by rotation adopting a forward approach in which we compare the theoretical frequency separations with the observed ones assuming different types of plausible internal rotation profiles. We also employ two asteroseismological inversion methods for the inversion of the rotation profile of PG 0122+200. We find evidence for differential rotation in this star. We demonstrate that the frequency splittings of the rotational multiplets exhibited by PG 0122+200 are compatible with a rotation profile in which the central regions are spinning about 2.4 times faster than the stellar surface.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
description We put asteroseismological constraints on the internal rotation profile of the GW Vir (PG1159-type) star PG 0122+200. To this end we employ a state-of-the-art asteroseismological model for this star and assess the expected frequency splittings induced by rotation adopting a forward approach in which we compare the theoretical frequency separations with the observed ones assuming different types of plausible internal rotation profiles. We also employ two asteroseismological inversion methods for the inversion of the rotation profile of PG 0122+200. We find evidence for differential rotation in this star. We demonstrate that the frequency splittings of the rotational multiplets exhibited by PG 0122+200 are compatible with a rotation profile in which the central regions are spinning about 2.4 times faster than the stellar surface.
publishDate 2011
dc.date.none.fl_str_mv 2011
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/84856
url http://sedici.unlp.edu.ar/handle/10915/84856
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0035-8711
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2011.19642.x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
2519-2526
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.070432

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