| Texto completo | |
| Autor(es): |
Schreiber, Matthias R.
[1, 2]
;
Belloni, Diogo
[1, 3]
;
Gansicke, Boris T.
[4]
;
Parsons, Steven G.
[5]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Univ Tecn Federico Santa Maria, Dept Fis, Av Espana 1680, Valparaiso - Chile
[2] Millenium Nucleus Planet Format NPF, Valparaiso - Chile
[3] Natl Inst Space Res, Av Astronautas 1758, BR-12227010 Sao Jose Dos Campos, SP - Brazil
[4] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands - England
[5] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire - England
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Monthly Notices of the Royal Astronomical Society; v. 506, n. 1, p. L29-L34, SEP 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
We investigate whether the recently suggested rotation and crystallization driven dynamo can explain the apparent increase of magnetism in old metal polluted white dwarfs. We find that the effective temperature distribution of polluted magnetic white dwarfs is in agreement with most/all of them having a crystallizing core, and increased rotational velocities are expected due to accretion of planetary material that is evidenced by the metal absorption lines. We conclude that a rotation and crystallization driven dynamo offers not only an explanation for the different occurrence rates of strongly magnetic white dwarfs in close binaries but also for the high incidence of weaker magnetic fields in old metal polluted white dwarfs. (AU) | |
| Processo FAPESP: | 17/14289-3 - Variáveis cataclísmicas magnéticas: evolução secular com o código BSE e modelagem de emissão com o código CYCLOPS |
| Beneficiário: | Diogo Teixeira Belloni |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |