Neutrino transport in strongly magnetized proto-neutron stars and the origin of pulsar kicks: the effect of asymmetric magnetic field topology

摘要

In proto-neutron stars with strong magnetic fields, the cross section forυ_e(υ_e) absorption on neutrons (protons) depends on the local magnetic field strength resulting from the quantization of energy levels for the e~-(e~+) produced in the final state. If the neutron star possesses an asymmetric magnetic field topol- ogy in the sense that the magnitude of magnetic field in the north pole is different from that in the south pole, then asymmetric neutrino emission may be generated. We calculated the absorption cross sections of v_e and v_e in strong magnetic fields as a function of the neutrino energy.