Double degenerate mergers as progenitors of high-field magnetic white dwarfs

High-field magnetic white dwarfs have been long suspected to be the result of stellar mergers. However, the nature of the coalescing stars and the precise mechanism that produces the magnetic field are still unknown. Here, we show that the hot, convective, differentially rotating corona present in t...

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Detalles Bibliográficos
Autores principales: García Berro, Enrique, Lorén Aguilar, Pablo, Aznar Siguán, Gabriela, Torres, Santiago, Camacho, Judit, Althaus, Leandro Gabriel, Córsico, Alejandro Hugo, Külebi, Baybars, Isern, Jordi
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Astronomía
binaries: general
stars: evolution
stars: interiors
stars: magnetic field
stars: rotation
white dwarfs
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/93578
http://iopscience.iop.org/article/10.1088/0004-637X/749/1/25/meta
https://ri.conicet.gov.ar/handle/11336/42642
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-93578
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Astronomía
binaries: general
stars: evolution
stars: interiors
stars: magnetic field
stars: rotation
white dwarfs
spellingShingle Astronomía
binaries: general
stars: evolution
stars: interiors
stars: magnetic field
stars: rotation
white dwarfs
García Berro, Enrique
Lorén Aguilar, Pablo
Aznar Siguán, Gabriela
Torres, Santiago
Camacho, Judit
Althaus, Leandro Gabriel
Córsico, Alejandro Hugo
Külebi, Baybars
Isern, Jordi
Double degenerate mergers as progenitors of high-field magnetic white dwarfs
topic_facet Astronomía
binaries: general
stars: evolution
stars: interiors
stars: magnetic field
stars: rotation
white dwarfs
description High-field magnetic white dwarfs have been long suspected to be the result of stellar mergers. However, the nature of the coalescing stars and the precise mechanism that produces the magnetic field are still unknown. Here, we show that the hot, convective, differentially rotating corona present in the outer layers of the remnant of the merger of two degenerate cores can produce magnetic fields of the required strength that do not decay for long timescales. Using a state-of-the-art Monte Carlo simulator, we also show that the expected number of high-field magnetic white dwarfs produced in this way is consistent with that found in the solar neighborhood.
format Articulo
Articulo
author García Berro, Enrique
Lorén Aguilar, Pablo
Aznar Siguán, Gabriela
Torres, Santiago
Camacho, Judit
Althaus, Leandro Gabriel
Córsico, Alejandro Hugo
Külebi, Baybars
Isern, Jordi
author_facet García Berro, Enrique
Lorén Aguilar, Pablo
Aznar Siguán, Gabriela
Torres, Santiago
Camacho, Judit
Althaus, Leandro Gabriel
Córsico, Alejandro Hugo
Külebi, Baybars
Isern, Jordi
author_sort García Berro, Enrique
title Double degenerate mergers as progenitors of high-field magnetic white dwarfs
title_short Double degenerate mergers as progenitors of high-field magnetic white dwarfs
title_full Double degenerate mergers as progenitors of high-field magnetic white dwarfs
title_fullStr Double degenerate mergers as progenitors of high-field magnetic white dwarfs
title_full_unstemmed Double degenerate mergers as progenitors of high-field magnetic white dwarfs
title_sort double degenerate mergers as progenitors of high-field magnetic white dwarfs
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/93578
http://iopscience.iop.org/article/10.1088/0004-637X/749/1/25/meta
https://ri.conicet.gov.ar/handle/11336/42642
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