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Article Contents
1 Introduction
2 A global disc simulation
3 An idealized model with shear and stratification, but no rotation nor helicity
4 Conclusions
Appendix A: A gauge in which magnetic helicity and magnetic helicity flux are automatically gauge invariant
Appendix B: Magnetic helicity in sub-domains
Appendix C: Velocity gradient correlation tensor
Appendix D: Coulomb-gauged helicity flux

Copyright ESO 2001
Published by EDP Sciences