Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores
- Autores
- Córsico, Alejandro Hugo; García Berro, E.; Althaus, Leandro Gabriel; Isern, J.
- Año de publicación
- 2004
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We 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.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata - Materia
-
Ciencias Astronómicas
Evolution - Stars
Oscillations
Stars
White dwarfs - Stars - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/84435
Ver los metadatos del registro completo
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Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon coresCórsico, Alejandro HugoGarcía Berro, E.Althaus, Leandro GabrielIsern, J.Ciencias AstronómicasEvolution - StarsOscillationsStarsWhite dwarfs - StarsWe 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.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plata2004info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf923-932http://sedici.unlp.edu.ar/handle/10915/84435enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20040416info: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:UNLP2025-10-22T16:57:06Zoai:sedici.unlp.edu.ar:10915/84435Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:57:06.838SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores |
| title |
Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores |
| spellingShingle |
Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores Córsico, Alejandro Hugo Ciencias Astronómicas Evolution - Stars Oscillations Stars White dwarfs - Stars |
| title_short |
Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores |
| title_full |
Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores |
| title_fullStr |
Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores |
| title_full_unstemmed |
Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores |
| title_sort |
Pulsations of massive ZZ Ceti stars with carbon/oxygen and oxygen/neon cores |
| dc.creator.none.fl_str_mv |
Córsico, Alejandro Hugo García Berro, E. Althaus, Leandro Gabriel Isern, J. |
| author |
Córsico, Alejandro Hugo |
| author_facet |
Córsico, Alejandro Hugo García Berro, E. Althaus, Leandro Gabriel Isern, J. |
| author_role |
author |
| author2 |
García Berro, E. Althaus, Leandro Gabriel Isern, J. |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
Ciencias Astronómicas Evolution - Stars Oscillations Stars White dwarfs - Stars |
| topic |
Ciencias Astronómicas Evolution - Stars Oscillations Stars White dwarfs - Stars |
| dc.description.none.fl_txt_mv |
We 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. Facultad de Ciencias Astronómicas y Geofísicas Instituto de Astrofísica de La Plata |
| description |
We 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. |
| publishDate |
2004 |
| dc.date.none.fl_str_mv |
2004 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/84435 |
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http://sedici.unlp.edu.ar/handle/10915/84435 |
| dc.language.none.fl_str_mv |
eng |
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eng |
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info:eu-repo/semantics/altIdentifier/issn/0004-6361 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20040416 |
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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) |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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