Magnetic field configurations associated with polarity intrusion in a solar active region

Details Magnetic field configurations associated with polarity intrusion in a solar active region Magnetic field configurations associated with polarity intrusion in a solar active region

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988soph..115..269l&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 115, no. 2, 1988, p. 269-276.

Physics

11

Force-Free Magnetic Fields, Magnetic Field Configurations, Solar Activity, Solar Magnetic Field, Current Sheets, Magnetohydrodynamic Stability, Photosphere, Solar Atmosphere, Solar Wind

Scientific paper

The theoretical force-free magnetic fields in the first paper of this series, modeling magnetic configurations associated with polarity intrusion in active regions, are established to be all stable to linear ideal hydromagnetic perturbations under the boundary condition that anchors the lines of force rigidly to the photosphere. It is shown first that these force-free fields belong to an even larger class found by Chang and Carovillano (1981). A proof by the energy principle is then given to establish that all force-free magnetic fields in the larger class are absolutely stable. The physical implications of this result are discussed.

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