Another challenge to this explanation is that other pulsars with bow shocks show bright X-ray emission surrounding the pulsar, and this is not seen for PSR J0357+3205.
對這項解釋的另一個挑戰則是其他有弓形震波的脈衝星在周圍會有明亮的X射線輻射，但在PSR J0357+3205周圍卻沒有相同的現象。