Physics
Scientific paper
Oct 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..dnp.cf001z&link_type=abstract
American Physical Society, 2002 Fall Meeting of the Division of Nuclear , abstract #CF.001
Physics
Scientific paper
The present study assumes the phase transition to matter with macroscopic strangeness at high matter densities and low temperatures to be first-order and the weak strangeness producing reactions to be able to occur in protoneutron stars (PNSs). The resulting lattice defined by negatively charged strange droplets in the mixed strange/non-strange phase will crystallize for typical temperatures in the PNS during the deleptonization phase of the inner core, corresponding to post-bounce times of up to 10s. Lepton number gradient induced convection or continued contraction of the PNS can fracture the solid phase transition lattice, resulting in anisotropic neutrino opacity. Using a static model for the strange and mixed PNS regions in conjunction with a hydrodynamical treatment of the outer, non-strange layers, it is shown that the resulting anisotropic neutrino transport can cause neutron star natal kicks in the observed range of a few x 100km/second. The mass energy of the directional neutrino jet might, for Galactic core collapse supernovae, cause an observable signal in future gravity wave detectors.
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