Radial intensity profiles for Model I (top panel) and Model II (bottom panel). X-ray emission at 1 keV (blue dashed line) was observed with Chandra (Cassam-Chenaï et al. 2007), and radio data at 1.4 GHz (red solid line) were taken from Slane et al. (2014). Following Slane et al. (2014) the radio data were slightly shifted to account for the expansion of the remnant. The gray dotted line in the bottom panel represents a radio profile produced without magnetic-field damping.