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dc.contributor.authorTeed, Roberten
dc.contributor.authorProctor, Michaelen
dc.date.accessioned2016-03-09T12:34:09Z
dc.date.available2016-03-09T12:34:09Z
dc.date.issued2016-03-03en
dc.identifier.citationTeed & Proctor. Monthly Notices of the Royal Astronomical Society (2016). doi: 10.1093/mnras/stw490en
dc.identifier.issn0035-8711
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/254272
dc.description.abstractThe Sun's magnetic field exhibits coherence in space and time on much larger scales than the turbulent convection that ultimately powers the dynamo. In the past the α-effect (mean-field) concept has been used to model the solar cycle, but recent work has cast doubt on the validity of the mean-field ansatz under solar conditions. This indicates that one should seek an alternative mechanism for generating large-scale structure. One possibility is the recently proposed ‘shear dynamo’ mechanism where large-scale magnetic fields are generated in the presence of a simple shear. Further investigation of this proposition is required, however, because work has been focused on the linear regime with a uniform shear profile thus far. In this paper we report results of the extension of the original shear dynamo model into the nonlinear regime. We find that whilst large-scale structure can initially persist into the saturated regime, in several of our simulations it is destroyed via large increase in kinetic energy. This result casts doubt on the ability of the simple uniform shear dynamo mechanism to act as an alternative to the α-effect in solar conditions.
dc.description.sponsorshipThis work was supported by the Science and Technology Facilities Council, grant ST/L000636/1.
dc.languageEnglishen
dc.language.isoenen
dc.publisherOxford University Press
dc.subjectsun: dynamoen
dc.subjectMHDen
dc.subjectmagnetic fieldsen
dc.subjectmethods: numericalen
dc.titleDestruction of large-scale magnetic field in nonlinear simulations of the shear dynamoen
dc.typeArticle
dc.description.versionThis is the author accepted manuscript. The final version is available from Oxford University Press via http://dx.doi.org/10.1093/mnras/stw490en
prism.publicationDate2016en
prism.publicationNameMonthly Notices of the Royal Astronomical Societyen
dc.rioxxterms.funderSTFC
dc.rioxxterms.projectidST/L000636/1
rioxxterms.versionofrecord10.1093/mnras/stw490en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2016-03-03en
dc.contributor.orcidProctor, Michael [0000-0002-2249-342X]
dc.identifier.eissn1365-2966
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idSTFC (ST/L000636/1)


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