Anomalous hydrodynamics kicks neutron stars




Kaminski, Matthias
Uhlemann, Christoph F.
Bleicher, Marcus
Schaffner-Bielich, Jürgen

Journal Title

Journal ISSN

Volume Title


Physics Letters B


Observations show that, at the beginning of their existence, neutron stars are accelerated briskly to velocities of up to a thousand kilometers per second. We argue that this remarkable effect can be explained as a manifestation of quantum anomalies on astrophysical scales. To theoretically describe the early stage in the life of neutron stars we use hydrodynamics as a systematic effective-field-theory framework. Within this framework, anomalies of the Standard Model of particle physics as underlying microscopic theory imply the presence of a particular set of transport terms, whose form is completely fixed by theoretical consistency. The resulting chiral transport effects in proto-neutron stars enhance neutrino emission along the internal magnetic field, and the recoil can explain the order of magnitude of the observed kick velocities.




Kaminski, M., Uhlemann, C.F., Bleicher, M. & Schaffner-Bielich, J. (2016). Anomalous hydrodynamics kicks neutron stars. Physics Letters B, 760, 170-174.