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dc.contributor.author Calcaferro, Leila Magdalena
dc.contributor.author Corsico, Alejandro Hugo
dc.contributor.author Althaus, Leandro Gabriel
dc.date.available 2018-02-06T14:13:53Z
dc.date.issued 2016-04
dc.identifier.citation Calcaferro, Leila Magdalena; Corsico, Alejandro Hugo; Althaus, Leandro Gabriel; Asteroseismology of the GW Virginis stars SDSS J0349-0059 and VV 47; EDP Sciences; Astronomy and Astrophysics; 589; 4-2016
dc.identifier.issn 0004-6361
dc.identifier.uri http://hdl.handle.net/11336/35731
dc.description.abstract Context. GW Virginis stars are a well-studied class of nonradial g-mode pulsators. SDSS J0349−0059 and VV 47 are two PG 1159 star members of this class of variable stars. SDSS J0349−0059 is an interesting GW Vir star that shows a complete pulsation spectrum that includes rotational splitting of some of its frequencies. VV 47 is a pulsating PG 1159 star surrounded by a planetary nebula. This star is particularly interesting because it exhibits a rich and complex pulsation spectrum.Aims. We present an asteroseismological study of SDSS J0349−0059 and VV 47 aimed mainly at deriving their total mass on the basis of state-of-the-art PG 1159 evolutionary models.Methods. We computed adiabatic nonradial g-mode pulsation periods for PG 1159 evolutionary models with stellar masses ranging from 0.515 to 0.741 M⊙, that take into account the complete evolution of the progenitor stars. We first estimated a mean period spacing for both SDSS J0349−0059 and VV 47 and then constrained the stellar mass of these stars 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 to search for a representative seismological model for each star. Finally, we estimated the rotation period of SDSS J0349−0059.Results. We found a spectroscopic mass of M⋆ ~ 0.543 M⊙ for SDSS J0349−0059 and M⋆ ~ 0.529 M⊙ for VV 47. By comparing the observed period spacing with the asymptotic period spacing, we obtain M⋆ ~ 0.569 M⊙ for SDSS J0349−0059 and M⋆ ~ 0.523 M⊙ for VV 47. When we compare the observed period spacing with the average of the computed period spacings, we find M⋆ ~ 0.535 M⊙ for SDSS J0349−0059 and M⋆ ~ 0.528 M⊙ for VV 47. Searching for the best period fit, we found for SDSS J0349−0059 an asteroseismological model with M⋆ = 0.542 M⊙ and Teff = 91 255 K. For VV 47, we were unable to find a unique and unambiguous asteroseismological model. Finally, for SDSS J0349−0059, we determined the rotation period to be Prot = 1/Ω ~ 0.407 days.Conclusions. The results presented in this work constitute a further step in the study of GW Vir stars through asteroseismology in the frame of fully evolutionary models of PG 1159 stars. In particular, the potential of asteroseismology to derive stellar masses of PG 1159 stars with an unprecedented precision is shown yet again.
dc.format application/pdf
dc.language.iso eng
dc.publisher EDP Sciences
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject Evolution of stars
dc.subject Interior stars
dc.subject Oscillations
dc.subject White dwarfs
dc.subject.classification Astronomía
dc.subject.classification Ciencias Físicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Asteroseismology of the GW Virginis stars SDSS J0349-0059 and VV 47
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2018-01-12T19:25:24Z
dc.journal.volume 589
dc.journal.pais Francia
dc.journal.ciudad Paris
dc.description.fil Fil: Calcaferro, Leila Magdalena. 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
dc.description.fil 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
dc.description.fil 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
dc.journal.title Astronomy and Astrophysics
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201527996
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2016/05/aa27996-15/aa27996-15.html
dc.conicet.fuente unificacion


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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)