A video showing the evolution of magnetic pressure in the ﹩{ \mathcal M }=8﹩ simulation leading up to t_peak across the structure plotted in Figure 9. Top: each frame is colored such that regions with higher pressures are lighter and yellow and lower energy density regions are darker and blue. A white horizontal line is drawn at Y = 200d_i to show where the cuts plotted in the panel below are taken, and faint white vertical lines are guides to aid in comparing the top and bottom panels. Bottom: plots of ﹩\mathrm{log}{P}_{B\perp }﹩ as a function of X, where Y = 200d_i. Right: a horizontal red line denotes the time of each frame in units of τ. Early frames each last ﹩{\rm{\Delta }}t=1{{\rm{\Omega }}}_{ci}^{-1}=0.015625\tau ﹩; once structure begins to form, we slow the video, with each frame lasting ﹩{\rm{\Delta }}t=0.1{{\rm{\Omega }}}_{ci}^{-1}=0.0015625\tau ﹩. The static version of this plot shows the final frame of the video. The full animated version of this figure (11 s) can be viewed.

(An animation of this figure is available in the online article.)

(An animation of this figure is available.)

The video/animation of this figure is available in the online journal.