Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985afz....23..393s&link_type=abstract
(Astrofizika, vol. 23, Sept.-Oct. 1985, p. 393-408) Astrophysics (ISSN 0571-7132), vol. 23, no. 2, March 1986, p. 595-604. Trans
Astronomy and Astrophysics
Astrophysics
4
Force-Free Magnetic Fields, Magnetic Field Configurations, Magnetic Flux, Magnetohydrodynamic Stability, Solar Magnetic Field, Energy Transfer, Magnetic Compression, Potential Fields, Torsion
Scientific paper
It is shown that equilibrium magnetic rope configurations stable over several Alfven times can exist in inhomogeneous external fields. The model of a uniformly twisted force-free magnetic tube is used to analyze the problem of transfer of field torsion along the axis of a magnetic rope which is weakly inhomogeneous along its length. It is shown that when allowance is made for the length of the perturbed section of the rope the H-psi field can be transferred from a wider to narrower part of the tube. The field torsion reaches a maximum at the top of the loop in accordance with Parker's (1979) conclusion. The dynamics of the ascent of a thin magnetic loop in an external potential field is investigated with allowance for the possible transfer of torsion to the top of the loop.
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