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Magnetic fields in white dwarfs and stellar evolution

Tout, Christopher A; Wickramasinghe, Dayal; Ferrario, Lilia

Description

The surface magnetic field strengths observed in the magnetic Ap, Bp stars (100-20000 G) and in the high field magnetic white dwarfs (106-109 G) cover many decades but nevertheless the range of magnetic fluxes observed in each of these stellar groups is similar. An evolutionary link between them therefore appears plausible. For both groups of stars there is also information on field complexity. The magnetic white dwarfs in general show non-dipole field structures which can be best modelled if...[Show more]

dc.contributor.authorTout, Christopher A
dc.contributor.authorWickramasinghe, Dayal
dc.contributor.authorFerrario, Lilia
dc.date.accessioned2015-12-13T23:09:33Z
dc.date.available2015-12-13T23:09:33Z
dc.identifier.issn0035-8711
dc.identifier.urihttp://hdl.handle.net/1885/87045
dc.description.abstractThe surface magnetic field strengths observed in the magnetic Ap, Bp stars (100-20000 G) and in the high field magnetic white dwarfs (106-109 G) cover many decades but nevertheless the range of magnetic fluxes observed in each of these stellar groups is similar. An evolutionary link between them therefore appears plausible. For both groups of stars there is also information on field complexity. The magnetic white dwarfs in general show non-dipole field structures which can be best modelled if we assume contributions from higher order multipoles. The field structures of the Ap and Bp stars are similarly complex. We investigate the hypothesis that the magnetic fields of the white dwarfs could be fossil remnants from the main-sequence phase by focussing on the problem of how field complexity may arise and be maintained during evolution to the compact star state. We also address the question of to what extent magnetic fields seen in the early type stars could be fossil remnants from the pre-main-sequence phases of stellar evolution dating back perhaps to the time of star formation.
dc.publisherBlackwell Publishing Ltd
dc.sourceMonthly Notices of the Royal Astronomical Society
dc.subjectKeywords: Stars: Evolution; Stars: Formation; Stars: Magnetic fields; Stars: Neutron; White dwarfs
dc.titleMagnetic fields in white dwarfs and stellar evolution
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume355
dc.date.issued2004
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationMigratedxPub16165
local.type.statusPublished Version
local.contributor.affiliationTout, Christopher A, University of Cambridge
local.contributor.affiliationWickramasinghe, Dayal, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationFerrario, Lilia, College of Physical and Mathematical Sciences, ANU
local.bibliographicCitation.startpageL13
local.bibliographicCitation.lastpageL16
local.identifier.doi10.1111/j.l365-2966.2004.08482.x
dc.date.updated2015-12-12T08:19:40Z
local.identifier.scopusID2-s2.0-10844288980
CollectionsANU Research Publications

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