On the cause of solar-like equatorward migration in global convective dynamo simulations
dc.contributor | Aalto-yliopisto | fi |
dc.contributor | Aalto University | en |
dc.contributor.author | Warnecke, Jörn | |
dc.contributor.author | Käpylä, Petri J. | |
dc.contributor.author | Käpylä, Maarit J. | |
dc.contributor.author | Brandenburg, Axel | |
dc.contributor.department | Centre of Excellence Research on Solar Long-Term Variability and Effects, ReSoLVE | |
dc.date.accessioned | 2018-08-01T12:39:46Z | |
dc.date.available | 2018-08-01T12:39:46Z | |
dc.date.issued | 2014 | |
dc.description | VK: resolve; Karhunen, J.; ReSoLVE | |
dc.description.abstract | We 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.version | Peer reviewed | en |
dc.format.extent | 6 | |
dc.format.mimetype | application/pdf | |
dc.identifier.citation | Warnecke , 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/L12 | en |
dc.identifier.doi | 10.1088/2041-8205/796/1/L12 | |
dc.identifier.issn | 2041-8205 | |
dc.identifier.issn | 2041-8213 | |
dc.identifier.other | PURE UUID: 2ac34900-422e-49e1-bd6c-c9909ade6c14 | |
dc.identifier.other | PURE ITEMURL: https://research.aalto.fi/en/publications/2ac34900-422e-49e1-bd6c-c9909ade6c14 | |
dc.identifier.other | PURE LINK: http://stacks.iop.org/2041-8205/796/L12 | |
dc.identifier.other | PURE FILEURL: https://research.aalto.fi/files/26502936/Warnecke_2014_ApJL_796_L12.pdf | |
dc.identifier.uri | https://aaltodoc.aalto.fi/handle/123456789/32707 | |
dc.identifier.urn | URN:NBN:fi:aalto-201808014107 | |
dc.language.iso | en | en |
dc.relation.ispartofseries | ASTROPHYSICAL JOURNAL LETTERS | en |
dc.relation.ispartofseries | Volume 796, issue 1 | en |
dc.rights | openAccess | en |
dc.title | On the cause of solar-like equatorward migration in global convective dynamo simulations | en |
dc.type | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä | fi |
dc.type.version | publishedVersion |