A&A 394, 1117 (2002)
E. Covas1 - R. Tavakol1 - S. Vorontsov1,2 - D. Moss3
1 - Astronomy Unit, School of Mathematical Sciences, Queen Mary, University of London, Mile End Road,
London E1 4NS, UK
2 - Institute of Physics of the Earth, B. Gruzinskaya 10, Moscow 123810, Russia
3 - Department of Mathematics, The University, Manchester M13 9PL, UK
A&A, 375, 260-263 (2001), DOI:10.1051/0004-6361:20010785
In this paper (and two others referenced) we stated that we fitted the dynamo generated poloidal magnetic fields to a vacuum exterior solution. We now realize that we instead inadvertently applied the condition that the azimuthal component of vector potential A=0 at r=R, with the consequence that the poloidal field lines do not penetrate the surface r=R.
We have since made extensive calculations with other boundary conditions on both the poloidal and toroidal parts of the magnetic field, and find that the results presented previously are qualitatively unaltered. All the reported phenomena can be recovered, albeit at slightly different parameter values, and the previously found robustness to changes in the model persists.