Fingering convection in accreting hydrogen white dwarf
- Autores
- Wachlin, Felipe Carlos; Vauclair, S.; Vauclair, G.; Althaus, Leandro Gabriel
- Año de publicación
- 2019
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- The accretion of heavy material from debris disk on the surface of hydrogen-rich white dwarfs induces a double diffusivity instability known as the fingering convection. It leads to an efficient extra mixing which brings the accreted material deeper in the star than by considering only mixing in the surface dynamical convection zone, in a time scale much shorter than that of gravitational settling. We performed numerical simulations of a continuous accretion of heavy material having a bulk Earth composition on the two well studied DAZ and ZZ Ceti pulsators GD 133 and G 29-38. We find that the existence of fingering convection implies much larger accretion rates to explain the observed abundances than previous estimates based on the standard mixing length theory and gravitational settling only.
Fil: Wachlin, Felipe Carlos. 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: Vauclair, S.. Centre National de la Recherche Scientifique; Francia
Fil: Vauclair, G.. Centre National de la Recherche Scientifique; Francia
Fil: Althaus, Leandro Gabriel. 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
An International Conference in Memory of Professor Jean-Paul Zahn's Great Scientific Achievements
París
Francia
Institut d'Astrophysique de Paris - Materia
-
instabilities
stars:evolution
stars:abundances
stars:interiors - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/210918
Ver los metadatos del registro completo
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Fingering convection in accreting hydrogen white dwarfWachlin, Felipe CarlosVauclair, S.Vauclair, G.Althaus, Leandro Gabrielinstabilitiesstars:evolutionstars:abundancesstars:interiorshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The accretion of heavy material from debris disk on the surface of hydrogen-rich white dwarfs induces a double diffusivity instability known as the fingering convection. It leads to an efficient extra mixing which brings the accreted material deeper in the star than by considering only mixing in the surface dynamical convection zone, in a time scale much shorter than that of gravitational settling. We performed numerical simulations of a continuous accretion of heavy material having a bulk Earth composition on the two well studied DAZ and ZZ Ceti pulsators GD 133 and G 29-38. We find that the existence of fingering convection implies much larger accretion rates to explain the observed abundances than previous estimates based on the standard mixing length theory and gravitational settling only.Fil: Wachlin, Felipe Carlos. 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: Vauclair, S.. Centre National de la Recherche Scientifique; FranciaFil: Vauclair, G.. Centre National de la Recherche Scientifique; FranciaFil: Althaus, Leandro Gabriel. 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; ArgentinaAn International Conference in Memory of Professor Jean-Paul Zahn's Great Scientific AchievementsParísFranciaInstitut d'Astrophysique de ParisEDP Sciences2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectConferenciaJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/210918Fingering convection in accreting hydrogen white dwarf; An International Conference in Memory of Professor Jean-Paul Zahn's Great Scientific Achievements; París; Francia; 2016; 1-51633-4760CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.eas-journal.org/articles/eas/abs/2019/01/eas1982018/eas1982018.htmlInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:09:44Zoai:ri.conicet.gov.ar:11336/210918instacron: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 11:09:44.466CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
Fingering convection in accreting hydrogen white dwarf |
| title |
Fingering convection in accreting hydrogen white dwarf |
| spellingShingle |
Fingering convection in accreting hydrogen white dwarf Wachlin, Felipe Carlos instabilities stars:evolution stars:abundances stars:interiors |
| title_short |
Fingering convection in accreting hydrogen white dwarf |
| title_full |
Fingering convection in accreting hydrogen white dwarf |
| title_fullStr |
Fingering convection in accreting hydrogen white dwarf |
| title_full_unstemmed |
Fingering convection in accreting hydrogen white dwarf |
| title_sort |
Fingering convection in accreting hydrogen white dwarf |
| dc.creator.none.fl_str_mv |
Wachlin, Felipe Carlos Vauclair, S. Vauclair, G. Althaus, Leandro Gabriel |
| author |
Wachlin, Felipe Carlos |
| author_facet |
Wachlin, Felipe Carlos Vauclair, S. Vauclair, G. Althaus, Leandro Gabriel |
| author_role |
author |
| author2 |
Vauclair, S. Vauclair, G. Althaus, Leandro Gabriel |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
instabilities stars:evolution stars:abundances stars:interiors |
| topic |
instabilities stars:evolution stars:abundances stars:interiors |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
The accretion of heavy material from debris disk on the surface of hydrogen-rich white dwarfs induces a double diffusivity instability known as the fingering convection. It leads to an efficient extra mixing which brings the accreted material deeper in the star than by considering only mixing in the surface dynamical convection zone, in a time scale much shorter than that of gravitational settling. We performed numerical simulations of a continuous accretion of heavy material having a bulk Earth composition on the two well studied DAZ and ZZ Ceti pulsators GD 133 and G 29-38. We find that the existence of fingering convection implies much larger accretion rates to explain the observed abundances than previous estimates based on the standard mixing length theory and gravitational settling only. Fil: Wachlin, Felipe Carlos. 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: Vauclair, S.. Centre National de la Recherche Scientifique; Francia Fil: Vauclair, G.. Centre National de la Recherche Scientifique; Francia Fil: Althaus, Leandro Gabriel. 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 An International Conference in Memory of Professor Jean-Paul Zahn's Great Scientific Achievements París Francia Institut d'Astrophysique de Paris |
| description |
The accretion of heavy material from debris disk on the surface of hydrogen-rich white dwarfs induces a double diffusivity instability known as the fingering convection. It leads to an efficient extra mixing which brings the accreted material deeper in the star than by considering only mixing in the surface dynamical convection zone, in a time scale much shorter than that of gravitational settling. We performed numerical simulations of a continuous accretion of heavy material having a bulk Earth composition on the two well studied DAZ and ZZ Ceti pulsators GD 133 and G 29-38. We find that the existence of fingering convection implies much larger accretion rates to explain the observed abundances than previous estimates based on the standard mixing length theory and gravitational settling only. |
| publishDate |
2019 |
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2019 |
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info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/conferenceObject Conferencia Journal http://purl.org/coar/resource_type/c_5794 info:ar-repo/semantics/documentoDeConferencia |
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publishedVersion |
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conferenceObject |
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http://hdl.handle.net/11336/210918 Fingering convection in accreting hydrogen white dwarf; An International Conference in Memory of Professor Jean-Paul Zahn's Great Scientific Achievements; París; Francia; 2016; 1-5 1633-4760 CONICET Digital CONICET |
| url |
http://hdl.handle.net/11336/210918 |
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Fingering convection in accreting hydrogen white dwarf; An International Conference in Memory of Professor Jean-Paul Zahn's Great Scientific Achievements; París; Francia; 2016; 1-5 1633-4760 CONICET Digital CONICET |
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eng |
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eng |
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