Ohmic dissipation and relaxation of force-free magnetic fields

Details Ohmic dissipation and relaxation of force-free magnetic fields Ohmic dissipation and relaxation of force-free magnetic fields

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984afz....20..627s&link_type=abstract

(Astrofizika, vol. 20, Nov.-Dec. 1984, p. 627-639) Astrophysics (ISSN 0571-7132), vol. 20, no. 6, May 1985, p. 704-712. Translat

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Cosmic Plasma, Force-Free Magnetic Fields, Ohmic Dissipation, Computational Astrophysics, Solar Atmosphere, Solar Magnetic Field

Scientific paper

The passive ohmic dissipation of force-free magnetic fields in low-pressure inhomogeneously conductive plasmas such as those encountered in many astrophysical objects is investigated theoretically. A general theory is developed and applied to the case of a weakly curved twisted attached magnetic loop in the solar atmosphere, assuming a force-free field within the loop. It is argued that the uniformly twisted field corresponds to the condition of minimal total magnetic energy, and that the variable-sign distribution proposed by Taylor (1974) has no physical basis.

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