Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable stars

Autores
Corsico, Alejandro Hugo; Althaus, Leandro Gabriel; Kepler, S. O.; Costa, J. E. S.; Miller Bertolami, Marcelo Miguel
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Aims. An asteroseismological study of PG 1159−035, the prototype of the GW Vir variable stars, has been performed on the basis of detailed and full PG 1159 evolutionary models presented by Miller Bertolami & Althaus (2006, A&A, 454, 845). Methods. We carried out extensive computations of adiabatic g-mode pulsation periods on PG 1159 evolutionary models with stellar masses spanning the range 0.530 to 0.741 M. These models were derived from the complete evolution of progenitor stars, including the thermally pulsing AGB phase and the born-again episode. We constrained the stellar mass of PG 1159−035 by comparing the observed period spacing with the asymptotic period spacing and with the average of the computed period spacings. We also employed the individual observed periods reported by Costa et al. (2007) to find a representative seismological model for PG 1159−035. Results. We derive a stellar mass in the range 0.56–0.59 M from the period-spacing data alone. We also find, on the basis of a period-fit procedure, an asteroseismological model representative of PG 1159−035 that reproduces the observed period pattern with an average of the period differences of δΠi = 0.64–1.03 s, consistent with the expected model uncertainties. The model has an effective temperature Teff = 128 000+8 600 −2 600 K, a stellar mass M∗ = 0.565+0.025 −0.009 M, a surface gravity log g = 7.42+0.21 −0.12, a stellar luminosity and radius of log(L∗/L) = 2.15 ± 0.08 and log(R∗/R) = −1.62+0.06 −0.09, and a He-rich envelope thickness of Menv = 0.017 M. The results of the period-fit analysis carried out in this work suggest that the surface gravity of PG 1159−035 would be 1σ larger than the spectroscopically inferred gravity. For our best-fit model of PG 1159−035, all of the pulsation modes are characterized by positive rates of period changes, at odds with the measurements by Costa & Kepler (2007, A&A, submitted).
Fil: Corsico, Alejandro Hugo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Althaus, Leandro Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Kepler, S. O.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Costa, J. E. S.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Miller Bertolami, Marcelo Miguel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Materia
Evolution of stars
Interior stars
Oscillations
Variable stars
White dwarfs
PG 1159-035 (estrella)
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/44918
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/44918
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable starsCorsico, Alejandro HugoAlthaus, Leandro GabrielKepler, S. O.Costa, J. E. S.Miller Bertolami, Marcelo MiguelEvolution of starsInterior starsOscillationsVariable starsWhite dwarfsPG 1159-035 (estrella)https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Aims. An asteroseismological study of PG 1159−035, the prototype of the GW Vir variable stars, has been performed on the basis of detailed and full PG 1159 evolutionary models presented by Miller Bertolami & Althaus (2006, A&A, 454, 845). Methods. We carried out extensive computations of adiabatic g-mode pulsation periods on PG 1159 evolutionary models with stellar masses spanning the range 0.530 to 0.741 M. These models were derived from the complete evolution of progenitor stars, including the thermally pulsing AGB phase and the born-again episode. We constrained the stellar mass of PG 1159−035 by comparing the observed period spacing with the asymptotic period spacing and with the average of the computed period spacings. We also employed the individual observed periods reported by Costa et al. (2007) to find a representative seismological model for PG 1159−035. Results. We derive a stellar mass in the range 0.56–0.59 M from the period-spacing data alone. We also find, on the basis of a period-fit procedure, an asteroseismological model representative of PG 1159−035 that reproduces the observed period pattern with an average of the period differences of δΠi = 0.64–1.03 s, consistent with the expected model uncertainties. The model has an effective temperature Teff = 128 000+8 600 −2 600 K, a stellar mass M∗ = 0.565+0.025 −0.009 M, a surface gravity log g = 7.42+0.21 −0.12, a stellar luminosity and radius of log(L∗/L) = 2.15 ± 0.08 and log(R∗/R) = −1.62+0.06 −0.09, and a He-rich envelope thickness of Menv = 0.017 M. The results of the period-fit analysis carried out in this work suggest that the surface gravity of PG 1159−035 would be 1σ larger than the spectroscopically inferred gravity. For our best-fit model of PG 1159−035, all of the pulsation modes are characterized by positive rates of period changes, at odds with the measurements by Costa & Kepler (2007, A&A, submitted).Fil: Corsico, Alejandro Hugo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Althaus, Leandro Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Kepler, S. O.. Universidade Federal do Rio Grande do Sul; BrasilFil: Costa, J. E. S.. Universidade Federal do Rio Grande do Sul; BrasilFil: Miller Bertolami, Marcelo Miguel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaEDP Sciences2008-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/44918Corsico, Alejandro Hugo; Althaus, Leandro Gabriel; Kepler, S. O.; Costa, J. E. S.; Miller Bertolami, Marcelo Miguel; Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable stars; EDP Sciences; Astronomy and Astrophysics; 478; 3; 12-2008; 869-8810004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20078646info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2008/06/aa8646-07/aa8646-07.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:14:19Zoai:ri.conicet.gov.ar:11336/44918instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:14:19.544CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable stars
title Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable stars
spellingShingle Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable stars
Corsico, Alejandro Hugo
Evolution of stars
Interior stars
Oscillations
Variable stars
White dwarfs
PG 1159-035 (estrella)
title_short Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable stars
title_full Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable stars
title_fullStr Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable stars
title_full_unstemmed Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable stars
title_sort Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable stars
dc.creator.none.fl_str_mv Corsico, Alejandro Hugo
Althaus, Leandro Gabriel
Kepler, S. O.
Costa, J. E. S.
Miller Bertolami, Marcelo Miguel
author Corsico, Alejandro Hugo
author_facet Corsico, Alejandro Hugo
Althaus, Leandro Gabriel
Kepler, S. O.
Costa, J. E. S.
Miller Bertolami, Marcelo Miguel
author_role author
author2 Althaus, Leandro Gabriel
Kepler, S. O.
Costa, J. E. S.
Miller Bertolami, Marcelo Miguel
author2_role author
author
author
author
dc.subject.none.fl_str_mv Evolution of stars
Interior stars
Oscillations
Variable stars
White dwarfs
PG 1159-035 (estrella)
topic Evolution of stars
Interior stars
Oscillations
Variable stars
White dwarfs
PG 1159-035 (estrella)
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Aims. An asteroseismological study of PG 1159−035, the prototype of the GW Vir variable stars, has been performed on the basis of detailed and full PG 1159 evolutionary models presented by Miller Bertolami & Althaus (2006, A&A, 454, 845). Methods. We carried out extensive computations of adiabatic g-mode pulsation periods on PG 1159 evolutionary models with stellar masses spanning the range 0.530 to 0.741 M. These models were derived from the complete evolution of progenitor stars, including the thermally pulsing AGB phase and the born-again episode. We constrained the stellar mass of PG 1159−035 by comparing the observed period spacing with the asymptotic period spacing and with the average of the computed period spacings. We also employed the individual observed periods reported by Costa et al. (2007) to find a representative seismological model for PG 1159−035. Results. We derive a stellar mass in the range 0.56–0.59 M from the period-spacing data alone. We also find, on the basis of a period-fit procedure, an asteroseismological model representative of PG 1159−035 that reproduces the observed period pattern with an average of the period differences of δΠi = 0.64–1.03 s, consistent with the expected model uncertainties. The model has an effective temperature Teff = 128 000+8 600 −2 600 K, a stellar mass M∗ = 0.565+0.025 −0.009 M, a surface gravity log g = 7.42+0.21 −0.12, a stellar luminosity and radius of log(L∗/L) = 2.15 ± 0.08 and log(R∗/R) = −1.62+0.06 −0.09, and a He-rich envelope thickness of Menv = 0.017 M. The results of the period-fit analysis carried out in this work suggest that the surface gravity of PG 1159−035 would be 1σ larger than the spectroscopically inferred gravity. For our best-fit model of PG 1159−035, all of the pulsation modes are characterized by positive rates of period changes, at odds with the measurements by Costa & Kepler (2007, A&A, submitted).
Fil: Corsico, Alejandro Hugo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Althaus, Leandro Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Kepler, S. O.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Costa, J. E. S.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Miller Bertolami, Marcelo Miguel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
description Aims. An asteroseismological study of PG 1159−035, the prototype of the GW Vir variable stars, has been performed on the basis of detailed and full PG 1159 evolutionary models presented by Miller Bertolami & Althaus (2006, A&A, 454, 845). Methods. We carried out extensive computations of adiabatic g-mode pulsation periods on PG 1159 evolutionary models with stellar masses spanning the range 0.530 to 0.741 M. These models were derived from the complete evolution of progenitor stars, including the thermally pulsing AGB phase and the born-again episode. We constrained the stellar mass of PG 1159−035 by comparing the observed period spacing with the asymptotic period spacing and with the average of the computed period spacings. We also employed the individual observed periods reported by Costa et al. (2007) to find a representative seismological model for PG 1159−035. Results. We derive a stellar mass in the range 0.56–0.59 M from the period-spacing data alone. We also find, on the basis of a period-fit procedure, an asteroseismological model representative of PG 1159−035 that reproduces the observed period pattern with an average of the period differences of δΠi = 0.64–1.03 s, consistent with the expected model uncertainties. The model has an effective temperature Teff = 128 000+8 600 −2 600 K, a stellar mass M∗ = 0.565+0.025 −0.009 M, a surface gravity log g = 7.42+0.21 −0.12, a stellar luminosity and radius of log(L∗/L) = 2.15 ± 0.08 and log(R∗/R) = −1.62+0.06 −0.09, and a He-rich envelope thickness of Menv = 0.017 M. The results of the period-fit analysis carried out in this work suggest that the surface gravity of PG 1159−035 would be 1σ larger than the spectroscopically inferred gravity. For our best-fit model of PG 1159−035, all of the pulsation modes are characterized by positive rates of period changes, at odds with the measurements by Costa & Kepler (2007, A&A, submitted).
publishDate 2008
dc.date.none.fl_str_mv 2008-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/44918
Corsico, Alejandro Hugo; Althaus, Leandro Gabriel; Kepler, S. O.; Costa, J. E. S.; Miller Bertolami, Marcelo Miguel; Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable stars; EDP Sciences; Astronomy and Astrophysics; 478; 3; 12-2008; 869-881
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/44918
identifier_str_mv Corsico, Alejandro Hugo; Althaus, Leandro Gabriel; Kepler, S. O.; Costa, J. E. S.; Miller Bertolami, Marcelo Miguel; Asteroseismological measurements on PG 1159-035, the prototype of the GW Virginis variable stars; EDP Sciences; Astronomy and Astrophysics; 478; 3; 12-2008; 869-881
0004-6361
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20078646
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2008/06/aa8646-07/aa8646-07.html
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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