Pulsar wind nebulae of runaway massive stars

A significant fraction of massive stars move at speed through the interstellar medium galaxies. After their death as core collapse supernovae, a possible final evolutionary state is that fast rotating magnetised neutron star, shaping its circumstellar into pulsar wind nebula. Understanding properties nebulae requires knowledge history progenitors. Using 2.5D magnetohydrodynamical simulations, we demonstrate that, in context runaway high mass red supergiant supernova progenitor, morphology subsequent nebula strongly affected by defunct progenitor star preshaping stellar surroundings throughout entire past life. In particular, obscured harbour asymmetries function progenitors blown cavity, inducing projected asymmetric up down synchrotron emission.