A. Achterberg, VARIATIONAL PRINCIPLE FOR SLENDER FLUX TUBES .2. STABILITY OF FLUX TUBES IN A DISK, Astronomy and astrophysics, 313(3), 1996, pp. 1016-1025
The variational principle for slender flux tubes derived in Paper I is
used to investigate linear waves and the linear stability of slender
flux tubes. It is shown that weakly magnetised tubes embedded in a dif
ferentially rotating disk are almost always unstable.