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

Abstract

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 ${\bbox ω}$, the spin connections entering in the Dirac equation give rise to the coupling term ${\bbox ω}\cdot {\bf p}$, 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 $\mathbf{p}$ with respect to ${\bbox ω}$. For our estimations, the large non standard neutrino magnetic momentum, ${\mu }_{\nu }\lesssim 10^{-11}{\mu }_B$, is considered.

arXiv comment8 pages, no figures. Changed content and references added

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