The stability of line tied force-free cylindrical arcades - Is an active region filament a requirement for a two-ribbon flare?

Details The stability of line tied force-free cylindrical arcades - Is an active region filament a requirement for a two-ribbon flare? The stability of line tied force-free cylindrical arcades - Is an active region filament a requirement for a two-ribbon flare?

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..111..333h&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 111, no. 2, 1987, p. 333-346.

Physics

17

Magnetohydrodynamics, Solar Corona, Solar Flares, Boundary Value Problems, Perturbation Theory

Scientific paper

The MHD stability of force-free, cylindrical arcades is investigated, including the stabilising effect of photospheric line tying. It is found that a wide variety of fields are stable. This suggests that either a departure from a force free equilibrium or suppression of line tying is necessary if a two-ribbon flare is to be triggered. It is postulated that in both circumstances, the existence of an active region filament is an essential preflare requirement for a two-ribbon flare.

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