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A shallow water analogue of asymmetric core-collapse, and neutron star kick/spin

Published online by Cambridge University Press:  05 September 2012

Thierry Foglizzo ,
Frédéric Masset ,
Jérôme Guilet  and
Gilles Durand
Thierry Foglizzo
Affiliation:
Lab. AIM Paris-Saclay, CEA/Irfu Univ. Paris-Diderot CNRS/INSU, 91191, France
Frédéric Masset
Affiliation:
Lab. AIM Paris-Saclay, CEA/Irfu Univ. Paris-Diderot CNRS/INSU, 91191, France Instituto de Ciencias Fisicas, UNAM, Av. Universidad s/n, 62210 Cuernavaca, Mor., Mexico
Jérôme Guilet
Affiliation:
Lab. AIM Paris-Saclay, CEA/Irfu Univ. Paris-Diderot CNRS/INSU, 91191, France DAMTP, University of Cambridge, Centre for Math. Sciences, Cambridge CB3 0WA, UK
Gilles Durand
Affiliation:
Lab. AIM Paris-Saclay, CEA/Irfu Univ. Paris-Diderot CNRS/INSU, 91191, France
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Abstract

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Massive stars end their life with the gravitational collapse of their core and the formation of a neutron star. Their explosion as a supernova depends on the revival of a spherical accretion shock, located in the inner 200km and stalled during a few hundred milliseconds. Numerical simulations suggest that the large scale asymmetry of the neutrino-driven explosion is induced by a hydrodynamical instability named SASI. Its non radial character is able to influence the kick and the spin of the resulting neutron star. The SWASI experiment is a simple shallow water analog of SASI, where the role of acoustic waves and shocks is played by surface waves and hydraulic jumps. Distances in the experiment are scaled down by a factor one million, and time is slower by a factor one hundred. This experiment is designed to illustrate the asymmetric nature of core-collapse supernova.

Keywords

supernovaeneutron starsinstabilitiesnumerical simulationsexperiments

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