| Full text | |
| Author(s): |
Schreiber, Matthias R.
[1, 2]
;
Belloni, Diogo
[1, 3]
;
Gansicke, Boris T.
[4]
;
Parsons, Steven G.
[5]
Total Authors: 4
|
| Affiliation: | [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
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Monthly Notices of the Royal Astronomical Society; v. 506, n. 1, p. L29-L34, SEP 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
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) | |
| FAPESP's process: | 17/14289-3 - Magnetic Cataclysmic variables: secular evolution with the BSE code and emission modelling with the CYCLOPS code |
| Grantee: | Diogo Teixeira Belloni |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |