Helicity Redistribution during Relaxation of Astrophysical Plasmas

Details Helicity Redistribution during Relaxation of Astrophysical Plasmas Helicity Redistribution during Relaxation of Astrophysical Plasmas

Feb 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000phrvl..84.1196a&link_type=abstract

Physical Review Letters, Volume 84, Issue 6, February 7, 2000, pp.1196-1199

Physics

25

Scientific paper

We present the first 3D numerical MHD simulations that show that Taylor's relaxation conjecture is not satisfied in some MHD evolution of magnetic configurations encountered in solar physics. We show that magnetic helicity can be slowly injected through the boundary into a magnetic configuration which then evolves into a MHD disruption, with the formation in finite time of a current sheet through which reconnection occurs, leading to a release of magnetic energy. While helicity is well conserved during the process, it is shown that the relaxed state is far from the constant- α linear force-free field that would be predicted by Taylor's conjecture.

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