The stability of sunspot magnetic fields and the origin of solar flares

Details The stability of sunspot magnetic fields and the origin of solar flares The stability of sunspot magnetic fields and the origin of solar flares

Oct 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971p%26ss...19.1289s&link_type=abstract

Planetary and Space Science, Volume 19, Issue 10, p. 1289-1296.

Physics

2

Scientific paper

The steady motion in sunspot magnetic regions is considered for both current-free and force-free configurations. The sufficient condition for stability is obtained in the presence of both external current-free and force-free magnetic fields and a steady motion. It is shown that the pattern of such steady motion is most important in triggering an instability of sunspot magnetic fields, both for the current-free and force-free configuration. When there is no steady motion, the current-free configuration of sunspot magnetic fields is always stable, whereas the stability in the case of force-free magnetic fields is connected with the configuration. The onset of a solar flare seems to be associated with an instability connected to the steady motion within the sunspot magnetic regions. NAS-NRC Associate with NASA.

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