Pulsar Kicks Induced by Spin Flavor Oscillations of Neutrinos in Gravitational Fields

The origin of pulsar kicks is reviewed in the framework of the spin-flip conversion of neutrinos propagating in the gravitational field of a magnetized protoneutron star. We find that for a mass in rotation with angular velocity $\text{bbox}\omega$, the spin connections entering in the Dirac equation give rise to the coupling term $\text{bbox}\omega \cdot \mathbf{p}$, being $\mathbf{p}$ the neutrino momentum. Such a coupling can be responsible of pulsar kicks owing to the neutrino emission asymmetry generated by the relative orientation of ${\bf p}$withrespectto${\bbox \omega}$. For our estimations, the large non standard neutrino magnetic momentum, ${\mu }_{\nu }\lesssim {10}^{-11}{\mu }_B$, is considered.