Pulsar Kicks With Modified URCA and Electrons in Landau Levels

Details Pulsar Kicks With Modified URCA and Electrons in Landau Levels Pulsar Kicks With Modified URCA and Electrons in Landau Levels

2007-06-11

arxiv.org/abs/0706.1511v3

Phys.Rev.D76:125007,2007

Astronomy and Astrophysics

Astrophysics

11 pages, 6 figures

Scientific paper

10.1103/PhysRevD.76.125007

We derive the energy asymmetry given the proto-neutron star during the time when the neutrino sphere is near the surface of the proto-neutron star, using the modified URCA process. The electrons produced with the anti-neutrinos are in Landau levels due to the strong magnetic field, and this leads to asymmetry in the neutrino momentum, and a pulsar kick. The magnetic field must be strong enough for a large fraction of the eletrons to be in the lowest Landau level, however, there is no direct dependence of our pulsar velocity on the strength of the magnetic field. Our main prediction is that the large pulsar kicks start at about 10 s and last for about 10 s, with the corresponding neutrinos correlated in the direction of the magnetic field. We predict a pulsar velocity of 1.03 $\times 10^{-4} (T/10^{10}K)^7$ km/s, which reaches 1000 km/s if T $\simeq 9.96 \times 10^{10}$ K.

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