Delayed pulsar kicks from the emission of sterile neutrinos

Abstract

The observed velocities of pulsars suggest the possibility that sterile neutrinos with mass of several keV are emitted from a cooling neutron star. The same sterile neutrinos could constitute all or part of cosmological dark matter. The neutrino-driven kicks can exhibit delays depending on the mass and the mixing angle, which can be compared with the pulsar data. We discuss the allowed ranges of sterile neutrino parameters, consistent with the latest cosmological and X-ray bounds, which can explain the pulsar kicks for different delay times.

4 pages, 1 figure; some discussion and references added; final version

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• Some Aspects of New CDM Models and CDM Detection Methods
• Axion mechanism of Sun luminosity, dark matter and extragalactic background light