TY  - JOUR
A1  - Kliem, Bernhard
A1  - Lin, J.
A1  - Forbes, T. G.
A1  - Priest, E. R.
A1  - Toeroek, T.
T1  - Catastrophe versus instability for the eruption of a toroadal solar magnetic flux
T2  - The astrophysical journal : an international review of spectroscopy and astronomical physics
N2  - The onset of a solar eruption is formulated here as either a magnetic catastrophe or as an instability. Both start with the same equation of force balance governing the underlying equilibria. Using a toroidal flux rope in an external bipolar or quadrupolar field as a model for the current-carrying flux, we demonstrate the occurrence of a fold catastrophe by loss of equilibrium for several representative evolutionary sequences in the stable domain of parameter space. We verify that this catastrophe and the torus instability occur at the same point; they are thus equivalent descriptions for the onset condition of solar eruptions.
KW  - magnetohydrodynamics (MHD)
KW  - Sun: corona
KW  - Sun: coronal mass ejections (CMEs)
KW  - Sun: filaments, prominences
KW  - Sun: flares
KW  - Sun: magnetic fields
Y1  - 2014
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/37751
SN  - 0004-637X
SN  - 1538-4357
VL  - 789
IS  - 1
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  -