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Title: Crucial Physical Dependencies of the Core-Collapse Supernova Mechanism

Here, 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.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4]
  1. Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Princeton Univ., NJ (United States). Schmidt Fellow and Inst. for Advanced Study
Publication Date:
Report Number(s):
LA-UR-16-28849
Journal ID: ISSN 0038-6308
Grant/Contract Number:
AC52-06NA25396; PHY-1144374; AST-1714267; AC03-76SF00098; ACI-1440032; OCI-0725070; ACI-1238993
Type:
Accepted Manuscript
Journal Name:
Space Science Reviews
Additional Journal Information:
Journal Volume: 214; Journal Issue: 1; Journal ID: ISSN 0038-6308
Publisher:
Springer
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States) Center (NERSC).
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Supernova theory; Neutrino physics; Multi-dimensional radiation/hydrodynamics
OSTI Identifier:
1460629
Alternate Identifier(s):
OSTI ID: 1461881