Left: map of the particle age within the PWN for the HD simulation using the input parameters for Run 1 listed in Table 2 at an age of 2500 yr. For a magnetic field of 13 μG (Table 2), the synchrotron lifetime of 3 keV emitting particles is ∼450 yr. Right: Chandra X-ray in the 3–6 keV band showing the extent of the X-ray PWN, with the radio contours overlaid. The significantly smaller extent of the X-ray PWN with respect to radio can be explained by the differences in particle ages across the PWN.