3 research outputs found
Pulsar Recoil by Large-Scale Anisotropies in Supernova Explosions
Assuming that the neutrino luminosity from the neutron star core is
sufficiently high to drive supernova explosions by the neutrino-heating
mechanism, we show that low-mode (l = 1, 2) convection can develop from random
seed perturbations behind the shock. A slow onset of the explosion is crucial,
requiring the core luminosity to vary slowly with time, in contrast to the
burst-like exponential decay assumed in previous work. Gravitational and
hydrodynamic forces by the globally asymmetric supernova ejecta were found to
accelerate the remnant neutron star on a timescale of more than a second to
velocities above 500 km/s, in agreement with observed pulsar proper motions.Comment: 4 ps figures, 2 colored, high-quality available upon request; revised
version, accepted by PR