Ain't No Crab, PWN Got A Brand New Bag: Correlated radio and X-ray   Structures in Pulsar Wind Nebulae
  The traditional view of radio pulsar wind nebulae (PWN), encouraged by the Crab nebula's X-ray and radio morphologies, is that they are a result of the integrated history of their pulsars' wind. The radio emission should therefore be largely unaffected by recent pulsar activity, and hence minimally correlated with structures in the X-ray nebulae. Observations of several PWN, both stationary (sPWN) and rapidly moving (rPWN), now show clear morphological relationships between structures in the radio and X-ray with radio intensity variations on the order of unity. We present high-resolution X-ray and radio images of several PWN of both types and discuss the morphological relationships between the two wavebands. 
Mallory S.E. Roberts, Maxim Lyutikov, Bryan M. Gaensler, Crystal   Brogan, Cindy R. Tam, Roger W. Romani