title: Experimental evidence for nonaxisymmetric magnetorotational instability in a rotating liquid metal exposed to an azimuthal magnetic field.
abstract: The azimuthal version of the magnetorotational instability (MRI) is a nonaxisymmetric instability of a hydrodynamically stable differentially rotating flow under the influence of a purely or predominantly azimuthal magnetic field. It may be of considerable importance for destabilizing accretion disks, and plays a central role in the concept of the MRI dynamo. We report the results of a liquid metal Taylor-Couette experiment that shows the occurrence of an azimuthal MRI in the expected range of Hartmann numbers.
authors: Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany.
authors: Martin
authors: M
authors: Seilmayer
authors: Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany.
authors: Vladimir
authors: V
authors: Galindo
authors: Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany.
authors: Gunter
authors: G
authors: Gerbeth
authors: Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany.
authors: Thomas
authors: T
authors: Gundrum
authors: Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany.
authors: Frank
authors: F
authors: Stefani
authors: Leibniz-Institut für Astrophysik Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany.
authors: Marcus
authors: M
authors: Gellert
authors: Leibniz-Institut für Astrophysik Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany.
authors: Günther
authors: G
authors: Rüdiger
authors: Leibniz-Institut für Astrophysik Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany.
authors: Manfred
authors: M
authors: Schultz
authors: Department of Applied Mathematics, University of Leeds, Leeds LS2 9JT, United Kingdom.
authors: Rainer
authors: R
authors: Hollerbach