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

dc.creatorCórsico, Alejandro Hugo
dc.creatorAlthaus, Leandro Gabriel
dc.creatorKawaler, S. D.
dc.creatorMiller Bertolami, Marcelo Miguel
dc.creatorGarcía Berro, E.
dc.creatorKepler, S. O.
dc.date2011
dc.date2019-11-04T17:02:46Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/84856
dc.identifierissn:0035-8711
dc.descriptionWe 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.
dc.descriptionFacultad de Ciencias Astronómicas y Geofísicas
dc.descriptionInstituto de Astrofísica de La Plata
dc.formatapplication/pdf
dc.format2519-2526
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectCiencias Astronómicas
dc.subjectStars: evolution
dc.subjectStars: individual: PG 0122+200
dc.subjectStars: interiors
dc.subjectStars: oscillations
dc.subjectStars: rotation
dc.subjectWhite dwarfs
dc.titleProbing the internal rotation of pre-white dwarf stars with asteroseismology: the case of PG 0122+200
dc.typeArticulo
dc.typeArticulo


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