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dc.contributor.author
Wachlin, Felipe Carlos
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dc.contributor.author
Vauclair, G.
dc.contributor.author
Vauclair, S.
dc.contributor.author
Althaus, Leandro Gabriel
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dc.date.available
2023-09-08T12:09:01Z
dc.date.issued
2022-04
dc.identifier.citation
Wachlin, Felipe Carlos; Vauclair, G.; Vauclair, S.; Althaus, Leandro Gabriel; New simulations of accreting DA white dwarfs: Inferring accretion rates from the surface contamination; EDP Sciences; Astronomy and Astrophysics; 660; 4-2022; 1-12
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/210880
dc.description.abstract
Context. A non-negligible fraction of white dwarf stars show the presence of heavy elements in their atmospheres. The most accepted explanation for this contamination is the accretion of material coming from tidally disrupted planetesimals, which forms a debris disk around the star. Aims. We provide a grid of models for hydrogen-rich white dwarfs accreting heavy material. We sweep a 3D parameter space that has different effective temperatures, envelope hydrogen contents, and accretion rates. The grid is appropriate for determining accretion rates in white dwarfs that show the presence of heavy elements. Methods. Full evolutionary calculations of accreting white dwarfs were computed including all relevant physical processes, particularly the fingering (thermohaline) convection, a process neglected in most previous works, which has to be considered to obtain realistic estimations. Accretion is treated as a continuous process, and bulk-Earth composition is assumed for the accreted material. Results. We obtain final (stationary or near-stationary) and reliable abundances for a grid of models that represent hydrogen-rich white dwarfs of different effective temperatures and hydrogen contents, which we apply to various accretion rates. Conclusions. Our results provide estimates of accretion rates, accounting for thermohaline mixing, to be used for further studies on evolved planetary systems.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ACCRETION, ACCRETION DISKS
dc.subject
INSTABILITIES
dc.subject
STARS: ABUNDANCES
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STARS: EVOLUTION
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STARS: INTERIORS
dc.subject
WHITE DWARFS
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
New simulations of accreting DA white dwarfs: Inferring accretion rates from the surface contamination
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-09-05T18:04:40Z
dc.journal.volume
660
dc.journal.pagination
1-12
dc.journal.pais
Francia
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dc.description.fil
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
dc.description.fil
Fil: Vauclair, G.. Centre National de la Recherche Scientifique; Francia
dc.description.fil
Fil: Vauclair, S.. Centre National de la Recherche Scientifique; Francia
dc.description.fil
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
dc.journal.title
Astronomy and Astrophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/202142289
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