title: Generation of magnetic fields by large-scale vortices in rotating convection.
abstract: We propose a self-consistent dynamo mechanism for the generation of large-scale magnetic fields in natural objects. Recent computational studies have described the formation of large-scale vortices in rotating turbulent convection. Here we demonstrate that for magnetic Reynolds numbers below the threshold for small-scale dynamo action, such turbulent flows can sustain large-scale magnetic fields, i.e., fields with a significant component on the scale of the system.
authors.affiliation: Department of Applied Mathematics, University of Leeds, Leeds LS2 9JT, United Kingdom.
authors.forename: Céline
authors.initials: C
authors.lastname: Guervilly
authors.affiliation: Department of Applied Mathematics, University of Leeds, Leeds LS2 9JT, United Kingdom.
authors.forename: David W
authors.initials: DW
authors.lastname: Hughes
authors.affiliation: Department of Applied Mathematics, University of Leeds, Leeds LS2 9JT, United Kingdom.
authors.forename: Chris A
authors.initials: CA
authors.lastname: Jones