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

A. Hood*, U. Anzer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)333-346
Number of pages14
JournalSolar Physics
Volume111
Issue number2
DOIs
Publication statusPublished - 1 Sept 1987

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