Abstract
We show that majoron emission from a hot nascent neutron star can be anisotropic in the presence of a strong magnetic field. If majorons carry a non-negligible fraction of the supernova energy, the resulting recoil velocity of a neutron star can explain the observed velocities of pulsars.
Highlights
Pulsar velocities present a long-standing puzzle [1]
In this paper we have shown that despite the strong bounds on the Majoron couplings to neutrinos, an asymmetric emission of Majorons can explain the high velocities of pulsars, provided that a substantial fraction of the binding energy of the star is emitted in the form of Majorons (EΦ/Etotal ∼> 0.1)
The asymmetric emission can be caused by a magnetic field of order of 1016 G in the supernova core
Summary
We show that Majoron emission from a hot nascent neutron star can be anisotropic in the presence of a strong magnetic field. If Majorons carry a non-negligible fraction of the supernova energy, the resulting recoil velocity of a neutron star can explain the observed velocities of pulsars. PACS numbers: 13.15.+g,14.60.St,97.60.Jd Keywords: neutrino, Majoron, supernova, pulsar velocities
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