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Critical Decay Index at the Onset of Solar Eruptions

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Academic year: 2021

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Figure

Figure 1. Maps of B z ( z = 0 ) at the beginning ( left ) and  end ( right ) of the convergence phase for “ Run C, ” “ Run S, ” “ Run D1, ” and “ Run D2 ” (fi rst, second, third, and fourth row, respectively )
Figure 2. Evolution of the magnetic fi eld for “ Run D1 ” during the quasi-static shearing ( left ) and  convergence ( middle ) phase and the eruptive phase ( right panels )
Figure 3. Temporal evolution of the free magnetic energy in the system ( purple
Figure 4. Vertical dependence of the norm, x, y, and z components ( blue, brown, black, and red lines ) of the magnetic fi eld ( solid lines ) and  current density ( dashed lines), as well as of the decay index (solid purple line) at a given (x, y) positio
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