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On the Neutrino Distributions in Phase Space for the Rotating Core-collapse Supernova Simulated with a Boltzmann-neutrino-radiation-hydrodynamics Code

Journal Article · · The Astrophysical Journal (Online)
 [1];  [2];  [3];  [3];  [4];  [5];  [6];  [7]
  1. Univ. of Tokyo (Japan); DOE/OSTI
  2. Princeton Univ., NJ (United States); California Inst. of Technology (CalTech), Pasadena, CA (United States)
  3. Kyoto Univ. (Japan); Waseda Univ., Tokyo (Japan)
  4. RIKEN, Saitama (Japan). Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS)
  5. High Energy Accelerator Research Organization, Ibaraki (Japan)
  6. Numazu College of Technology (Japan)
  7. Waseda Univ., Tokyo (Japan)

With the Boltzmann-radiation-hydrodynamics code, which we have developed to solve numerically the Boltzmann equations for neutrino transfer, the Newtonian hydrodynamics equations, and the Newtonian self-gravity simultaneously and consistently, in this work we simulate the collapse of a rotating core of the progenitor with a zero-age- main-sequence mass of 11.2 M and a shellular rotation of $$1\,\mathrm{rad}\,{{\rm{s}}}^{-1}$$ at the center. We pay particular attention in this paper to the neutrino distribution in phase space, which is affected by the rotation. By solving the Boltzmann equations directly, we can assess the rotation-induced distortion of the angular distribution in momentum space, which gives rise to the rotational component of the neutrino flux. We compare the Eddington tensors calculated both from the raw data and from the M1-closure approximation. We demonstrate that the Eddington tensor is determined by complicated interplays of the fluid velocity and the neutrino interactions and that the M1-closure, which assumes that the Eddington factor is determined by the flux factor, fails to fully capture this aspect, especially in the vicinity of the shock. We find that the error in the Eddington factor reaches ~20% in our simulation. This is due not to the resolution but to the different dependence of the Eddington and flux factors on the angular profile of the neutrino distribution function, and hence modification to the closure relation is needed.

Research Organization:
Univ. of California, Oakland, CA (United States)
Sponsoring Organization:
Ministry of Education, Culture, Sports, Science and Technology (MEXT); Japan Society for the Promotion of Science (JSPS); National Science Foundation (NSF); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21). Scientific Discovery through Advanced Computing (SciDAC)
Grant/Contract Number:
SC0018297
OSTI ID:
1612911
Journal Information:
The Astrophysical Journal (Online), Journal Name: The Astrophysical Journal (Online) Journal Issue: 2 Vol. 872; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

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Revival of the Fittest: Exploding Core-Collapse Supernovae from 12 to 25 M$_{\odot}$ text January 2018
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A Successful 3D Core-Collapse Supernova Explosion Model text January 2018
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Cited By (8)

Fast neutrino flavor conversion modes in multidimensional core-collapse supernova models: The role of the asymmetric neutrino distributions journal February 2020
Long-term simulations of multi-dimensional core-collapse supernovae: Implications for neutron star kicks journal August 2019
Multimessenger asteroseismology of core-collapse supernovae journal December 2019
Three-dimensional Boltzmann-hydro Code for Core-collapse in Massive Stars. III. A New Method for Momentum Feedback from Neutrino to Matter journal June 2019
One-, Two-, and Three-dimensional Simulations of Oxygen-shell Burning Just before the Core Collapse of Massive Stars journal August 2019
Fast-pairwise Collective Neutrino Oscillations Associated with Asymmetric Neutrino Emissions in Core-collapse Supernovae journal November 2019
One-, Two-, and Three-dimensional Simulations of Oxygen Shell Burning Just Before the Core-Collapse of Massive Stars text January 2019
Long-term Simulations of Multi-Dimensional Core-collapse Supernovae: Implications for Neutron Star Kicks text January 2019

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