Three-dimensional boltzmann-hydro code for core-collapse in massive stars. III. a new method for momentum feedback from neutrino to matter

Hiroki Nagakura, Kohsuke Sumiyoshi, Shoichi Yamada

Research output: Contribution to journalArticle

Abstract

We present a new method for neutrino-matter coupling in multi-dimensional radiation-hydrodynamic simulations of core-collapse supernovae (CCSNe) with the full Boltzmann neutrino transport. This development is motivated by the fact that accurate conservation of momentum is required for reliable numerical modelings of CCSN dynamics including a recoil of proto-neutron stars (PNSs). The new method is built on a hybrid approach in which we use the energy-momentum tensor of neutrinos to compute the momentum feedback from neutrino to matter in the optically thick region while we employ the collision term in the optically thin region. In this method we utilize a general relativistic description of radiation-hydrodynamics with angular moments, which allows us to evaluate the momentum feedback from neutrino to matter without inconsistency with our Boltzmann solver. We demonstrate that the new method substantially improves the accuracy of linear momentum conservation in our CCSN simulations under reasonable angular resolutions in momentum space, alleviating the difficulty in giving the diffusion limit precisely with the discrete ordinate (S n) method. It is the first ever demonstration that the PNS kick can be handled directly and properly in multi-dimensional radiation-hydrodynamic simulations with the full Boltzmann neutrino transport.

Original languageEnglish
Article number160
JournalAstrophysical Journal
Volume878
Issue number2
DOIs
Publication statusPublished - 2019 Jun 20

Fingerprint

massive stars
momentum
neutrinos
hydrodynamics
neutron stars
conservation
radiation
simulation
angular resolution
supernovae
code
method
collision
kinetic energy
tensors
moments
collisions
modeling
energy

Keywords

  • General
  • Hydrodynamics - neutrinos - supernovae

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Three-dimensional boltzmann-hydro code for core-collapse in massive stars. III. a new method for momentum feedback from neutrino to matter. / Nagakura, Hiroki; Sumiyoshi, Kohsuke; Yamada, Shoichi.

In: Astrophysical Journal, Vol. 878, No. 2, 160, 20.06.2019.

Research output: Contribution to journalArticle

@article{09d85573e3784c45bd0b480e5c5294f6,
title = "Three-dimensional boltzmann-hydro code for core-collapse in massive stars. III. a new method for momentum feedback from neutrino to matter",
abstract = "We present a new method for neutrino-matter coupling in multi-dimensional radiation-hydrodynamic simulations of core-collapse supernovae (CCSNe) with the full Boltzmann neutrino transport. This development is motivated by the fact that accurate conservation of momentum is required for reliable numerical modelings of CCSN dynamics including a recoil of proto-neutron stars (PNSs). The new method is built on a hybrid approach in which we use the energy-momentum tensor of neutrinos to compute the momentum feedback from neutrino to matter in the optically thick region while we employ the collision term in the optically thin region. In this method we utilize a general relativistic description of radiation-hydrodynamics with angular moments, which allows us to evaluate the momentum feedback from neutrino to matter without inconsistency with our Boltzmann solver. We demonstrate that the new method substantially improves the accuracy of linear momentum conservation in our CCSN simulations under reasonable angular resolutions in momentum space, alleviating the difficulty in giving the diffusion limit precisely with the discrete ordinate (S n) method. It is the first ever demonstration that the PNS kick can be handled directly and properly in multi-dimensional radiation-hydrodynamic simulations with the full Boltzmann neutrino transport.",
keywords = "General, Hydrodynamics - neutrinos - supernovae",
author = "Hiroki Nagakura and Kohsuke Sumiyoshi and Shoichi Yamada",
year = "2019",
month = "6",
day = "20",
doi = "10.3847/1538-4357/ab2189",
language = "English",
volume = "878",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2",

}

TY - JOUR

T1 - Three-dimensional boltzmann-hydro code for core-collapse in massive stars. III. a new method for momentum feedback from neutrino to matter

AU - Nagakura, Hiroki

AU - Sumiyoshi, Kohsuke

AU - Yamada, Shoichi

PY - 2019/6/20

Y1 - 2019/6/20

N2 - We present a new method for neutrino-matter coupling in multi-dimensional radiation-hydrodynamic simulations of core-collapse supernovae (CCSNe) with the full Boltzmann neutrino transport. This development is motivated by the fact that accurate conservation of momentum is required for reliable numerical modelings of CCSN dynamics including a recoil of proto-neutron stars (PNSs). The new method is built on a hybrid approach in which we use the energy-momentum tensor of neutrinos to compute the momentum feedback from neutrino to matter in the optically thick region while we employ the collision term in the optically thin region. In this method we utilize a general relativistic description of radiation-hydrodynamics with angular moments, which allows us to evaluate the momentum feedback from neutrino to matter without inconsistency with our Boltzmann solver. We demonstrate that the new method substantially improves the accuracy of linear momentum conservation in our CCSN simulations under reasonable angular resolutions in momentum space, alleviating the difficulty in giving the diffusion limit precisely with the discrete ordinate (S n) method. It is the first ever demonstration that the PNS kick can be handled directly and properly in multi-dimensional radiation-hydrodynamic simulations with the full Boltzmann neutrino transport.

AB - We present a new method for neutrino-matter coupling in multi-dimensional radiation-hydrodynamic simulations of core-collapse supernovae (CCSNe) with the full Boltzmann neutrino transport. This development is motivated by the fact that accurate conservation of momentum is required for reliable numerical modelings of CCSN dynamics including a recoil of proto-neutron stars (PNSs). The new method is built on a hybrid approach in which we use the energy-momentum tensor of neutrinos to compute the momentum feedback from neutrino to matter in the optically thick region while we employ the collision term in the optically thin region. In this method we utilize a general relativistic description of radiation-hydrodynamics with angular moments, which allows us to evaluate the momentum feedback from neutrino to matter without inconsistency with our Boltzmann solver. We demonstrate that the new method substantially improves the accuracy of linear momentum conservation in our CCSN simulations under reasonable angular resolutions in momentum space, alleviating the difficulty in giving the diffusion limit precisely with the discrete ordinate (S n) method. It is the first ever demonstration that the PNS kick can be handled directly and properly in multi-dimensional radiation-hydrodynamic simulations with the full Boltzmann neutrino transport.

KW - General

KW - Hydrodynamics - neutrinos - supernovae

UR - http://www.scopus.com/inward/record.url?scp=85069497792&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85069497792&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/ab2189

DO - 10.3847/1538-4357/ab2189

M3 - Article

AN - SCOPUS:85069497792

VL - 878

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 160

ER -