On the cause of solar-like equatorward migration in global convective dynamo simulations

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorWarnecke, Jörn
dc.contributor.authorKäpylä, Petri J.
dc.contributor.authorKäpylä, Maarit J.
dc.contributor.authorBrandenburg, Axel
dc.contributor.departmentCentre of Excellence Research on Solar Long-Term Variability and Effects, ReSoLVE
dc.date.accessioned2018-08-01T12:39:46Z
dc.date.available2018-08-01T12:39:46Z
dc.date.issued2014
dc.descriptionVK: resolve; Karhunen, J.; ReSoLVE
dc.description.abstractWe present results from four convectively driven stellar dynamo simulations in spherical wedge geometry. All of these simulations produce cyclic and migrating mean magnetic fields. Through detailed comparisons, we show that the migration direction can be explained by an αΩ dynamo wave following the Parker-Yoshimura rule. We conclude that the equatorward migration in this and previous work is due to a positive (negative) α effect in the northern (southern) hemisphere and a negative radial gradient of Ω outside the inner tangent cylinder of these models. This idea is supported by a strong correlation between negative radial shear and toroidal field strength in the region of equatorward propagation.en
dc.description.versionPeer revieweden
dc.format.extent6
dc.format.mimetypeapplication/pdf
dc.identifier.citationWarnecke , J , Käpylä , P J , Käpylä , M J & Brandenburg , A 2014 , ' On the cause of solar-like equatorward migration in global convective dynamo simulations ' , Astrophysical Journal Letters , vol. 796 , no. 1 , L12 . https://doi.org/10.1088/2041-8205/796/1/L12en
dc.identifier.doi10.1088/2041-8205/796/1/L12
dc.identifier.issn2041-8205
dc.identifier.issn2041-8213
dc.identifier.otherPURE UUID: 2ac34900-422e-49e1-bd6c-c9909ade6c14
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/2ac34900-422e-49e1-bd6c-c9909ade6c14
dc.identifier.otherPURE LINK: http://stacks.iop.org/2041-8205/796/L12
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/26502936/Warnecke_2014_ApJL_796_L12.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/32707
dc.identifier.urnURN:NBN:fi:aalto-201808014107
dc.language.isoenen
dc.relation.ispartofseriesASTROPHYSICAL JOURNAL LETTERSen
dc.relation.ispartofseriesVolume 796, issue 1en
dc.rightsopenAccessen
dc.titleOn the cause of solar-like equatorward migration in global convective dynamo simulationsen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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