Effect of photospheric twisting motions on a confined toroidal loop

Details Effect of photospheric twisting motions on a confined toroidal loop Effect of photospheric twisting motions on a confined toroidal loop

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004soph..222...79g&link_type=abstract

Solar Physics, v. 222, Issue 1, p. 79-94 (2004).

Physics

15

Scientific paper

In this paper we investigate the effect of twisting motions at the photosphere on a curved loop confined by overlying field lines. We find that the twisting motions form a twisted loop along which a current builds up. However, the toroidal curvature of the loop appears to have a stabilising effect as there is no sign of the kink instability for a twist of 3.4 π whereas in a straight cylinder for the same twist profile the critical twist is approximately 2.5 π. When we include resistivity in the simulation there are indications that reconnection occurs and releases a substantial proportion of the free magnetic energy.

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