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Critical decay index for eruptions of ‘short’ filaments View all abstracts by submitter

Boris Filippov   Submitted: 2021-03-15 00:33

Model of a partial current-carrying torus loop anchored to the photosphere is analyzed. Conditions of the catastrophic loss of equilibrium are considered and corresponding value of the critical decay index of external magnetic field is found. Taking into account line-tying conditions leads to non-monotonous dependence of the critical decay index on the height of the apex and length of the flux rope (its endpoints separation). For relatively short flux ropes, the critical decay index is significantly lower than unity, which is in contrast to widespread models with the typical critical decay index above unity. We present well-documented examples of eruptions where the critical decay index was definitely lower than unity.

Authors: Boris Filippov
Projects: None

Publication Status: Accepted for publication in MNRAS
Last Modified: 2021-03-15 19:32
Go to main E-Print page  The source of the major solar energetic particle events from super active region 11944  Thermal Trigger for Solar Flares I: Fragmentation of the Preflare Current Layer  Edit Entry  Download Preprint  Delete Entry 

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