Schreiber, M.R., Belloni, D., Gänsicke, B.T. et al. (1 more author) (2021) Magnetic dynamos in white dwarfs – II. Relating magnetism and pollution. Monthly Notices of the Royal Astronomical Society: Letters, 506 (1). L29-L34. ISSN 1745-3925
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 which 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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This is an author-produced version of a paper subsequently published in Monthly Notices of the Royal Astronomical Society: Letters. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | white dwarfs; magnetic fields; planetary systems |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/R003424/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 28 Jun 2021 13:36 |
Last Modified: | 21 Feb 2022 11:40 |
Status: | Published |
Publisher: | Oxford University Press (OUP) |
Refereed: | Yes |
Identification Number: | 10.1093/mnrasl/slab069 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:175682 |