Field lines corresponding to the contour boundaries of Fig. 3. The field of view of Fig. 3 and the aforementioned contours are overplotted in blue. Additionally, we show lines corresponding to the T_g = 1.0 contour for the upper axis (a), the T_g = 1.0 contour for the lower axis (b), for the previous two cases combined (c), for the axes of the previous two cases combined (d), and for the T_w = 1.0 contour (e). All panels include a plane of B_z from the lower boundary of the simulation domain.