Kicks and Induced Spins of Neutron Stars at Birth

Understand

Using simulations of non-rotating supernova progenitors, we explore the kicks imparted to and the spins induced in the compact objects birthed in core collapse.

• We find that the recoil due to neutrino emissions can be a factor affecting core recoil, comparable to and at times larger than the corresponding kick due to matter recoil.
• This result would necessitate a revision of the general model of the origin of pulsar proper motions.
• In addition, we find that the sign of the net neutrino momentum can be opposite to the sign of the corresponding matter recoil.