Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores

dc.creatorCórsico, Alejandro Hugo
dc.creatorGarcía Berro, E.
dc.creatorAlthaus, Leandro Gabriel
dc.creatorIsern, J.
dc.date2004
dc.date2019-10-30T17:36:07Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/84435
dc.identifierissn:0004-6361
dc.descriptionWe explore the adiabatic pulsational properties of massive white dwarf stars with hydrogen-rich envelopes and oxygen/neon and carbon/oxygen cores. To this end, we compute the cooling of massive white dwarf models for both core compositions taking into account the evolutionary history of the progenitor stars and the chemical evolution caused by time-dependent element diffusion. In particular, for the oxygen/neon models we adopt the chemical profile resulting from repeated carbon-burning shell flashes expected in very massive white dwarf progenitors. For carbon/oxygen white dwarfs we consider the chemical profiles resulting from phase separation upon crystallization. For both compositions we also take into account the effects of crystallization on the oscillation eigenmodes. We find that the pulsational properties of oxygen/neon white dwarfs are noticeably different from those made of carbon/oxygen, thus making asteroseismological techniques a promising way to distinguish between the two types of stars and, hence, to obtain valuable information about their progenitors.
dc.descriptionFacultad de Ciencias Astronómicas y Geofísicas
dc.descriptionInstituto de Astrofísica de La Plata
dc.formatapplication/pdf
dc.format923-932
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.subjectEvolution - Stars
dc.subjectOscillations
dc.subjectStars
dc.subjectWhite dwarfs - Stars
dc.titlePulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores
dc.typeArticulo
dc.typeArticulo


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