Crucial Physical Dependencies of the Core-Collapse Supernova Mechanism |
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Authors: | A Burrows D Vartanyan J C Dolence M A Skinner D Radice |
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Institution: | 1.Department of Astrophysical Sciences,Princeton University,Princeton,USA;2.CCS-2,Los Alamos National Laboratory,Los Alamos,USA;3.Livermore National Laboratory,Livermore,USA;4.Schmidt Fellow,Institute for Advanced Study,Princeton,USA |
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Abstract: | We explore with self-consistent 2D Fornax simulations the dependence of the outcome of collapse on many-body corrections to neutrino-nucleon cross sections, the nucleon-nucleon bremsstrahlung rate, electron capture on heavy nuclei, pre-collapse seed perturbations, and inelastic neutrino-electron and neutrino-nucleon scattering. Importantly, proximity to criticality amplifies the role of even small changes in the neutrino-matter couplings, and such changes can together add to produce outsized effects. When close to the critical condition the cumulative result of a few small effects (including seeds) that individually have only modest consequence can convert an anemic into a robust explosion, or even a dud into a blast. Such sensitivity is not seen in one dimension and may explain the apparent heterogeneity in the outcomes of detailed simulations performed internationally. A natural conclusion is that the different groups collectively are closer to a realistic understanding of the mechanism of core-collapse supernovae than might have seemed apparent. |
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