Top: time evolution of the magnetic field (upper panel) and the SNR and PWN radii (lower panel) for G292.0+1.8, produced by the 1D model described in Section 3.1. The input parameters for the model are those for Run 2, as listed in Table 2. The vertical dashed line represents an age of 2500 yr. The observed radii of the SNR and PWN are indicated by the horizontal blue and red dashed lines, respectively. Bottom: 1D model broadband spectrum of the PWN in G292.0+1.8 at the age of 2500 yr, corresponding to the model parameters listed in Table 2, with the radio (Gaensler & Wallace 2003) and X-ray (Hughes et al. 2001) fluxes from the PWN overlaid.