Chiral magnetohydrodynamic turbulence in core-collapse supernovae

Youhei Masada, Kei Kotake, Tomoya Takiwaki, Naoki Yamamoto

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Macroscopic evolution of relativistic charged matter with chirality imbalance is described by the chiral magnetohydrodynamics (chiral MHD). One such astrophysical system is high-density lepton matter in core-collapse supernovae where the chirality imbalance of leptons is generated by the parity-violating weak processes. After developing the chiral MHD equations for this system, we perform numerical simulations for the real-time evolutions of magnetic and flow fields and study the properties of the chiral MHD turbulence. In particular, we observe the inverse cascade of the magnetic energy and the fluid kinetic energy. Our results suggest that the chiral effects that have been neglected so far can reverse the turbulent cascade direction from direct to inverse cascade, which would impact the magnetohydrodynamics evolution in the supernova core toward explosion.

Original languageEnglish
Article number083018
JournalPhysical Review D
Volume98
Issue number8
DOIs
Publication statusPublished - 2018 Oct 15

Fingerprint

magnetohydrodynamic turbulence
magnetohydrodynamics
supernovae
cascades
chirality
leptons
explosions
flow distribution
astrophysics
parity
kinetic energy
fluids
magnetic fields
simulation
energy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Chiral magnetohydrodynamic turbulence in core-collapse supernovae. / Masada, Youhei; Kotake, Kei; Takiwaki, Tomoya; Yamamoto, Naoki.

In: Physical Review D, Vol. 98, No. 8, 083018, 15.10.2018.

Research output: Contribution to journalArticle

Masada, Youhei ; Kotake, Kei ; Takiwaki, Tomoya ; Yamamoto, Naoki. / Chiral magnetohydrodynamic turbulence in core-collapse supernovae. In: Physical Review D. 2018 ; Vol. 98, No. 8.
@article{fe79d2b6589b4c7384a387bf6802faca,
title = "Chiral magnetohydrodynamic turbulence in core-collapse supernovae",
abstract = "Macroscopic evolution of relativistic charged matter with chirality imbalance is described by the chiral magnetohydrodynamics (chiral MHD). One such astrophysical system is high-density lepton matter in core-collapse supernovae where the chirality imbalance of leptons is generated by the parity-violating weak processes. After developing the chiral MHD equations for this system, we perform numerical simulations for the real-time evolutions of magnetic and flow fields and study the properties of the chiral MHD turbulence. In particular, we observe the inverse cascade of the magnetic energy and the fluid kinetic energy. Our results suggest that the chiral effects that have been neglected so far can reverse the turbulent cascade direction from direct to inverse cascade, which would impact the magnetohydrodynamics evolution in the supernova core toward explosion.",
author = "Youhei Masada and Kei Kotake and Tomoya Takiwaki and Naoki Yamamoto",
year = "2018",
month = "10",
day = "15",
doi = "10.1103/PhysRevD.98.083018",
language = "English",
volume = "98",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "8",

}

TY - JOUR

T1 - Chiral magnetohydrodynamic turbulence in core-collapse supernovae

AU - Masada, Youhei

AU - Kotake, Kei

AU - Takiwaki, Tomoya

AU - Yamamoto, Naoki

PY - 2018/10/15

Y1 - 2018/10/15

N2 - Macroscopic evolution of relativistic charged matter with chirality imbalance is described by the chiral magnetohydrodynamics (chiral MHD). One such astrophysical system is high-density lepton matter in core-collapse supernovae where the chirality imbalance of leptons is generated by the parity-violating weak processes. After developing the chiral MHD equations for this system, we perform numerical simulations for the real-time evolutions of magnetic and flow fields and study the properties of the chiral MHD turbulence. In particular, we observe the inverse cascade of the magnetic energy and the fluid kinetic energy. Our results suggest that the chiral effects that have been neglected so far can reverse the turbulent cascade direction from direct to inverse cascade, which would impact the magnetohydrodynamics evolution in the supernova core toward explosion.

AB - Macroscopic evolution of relativistic charged matter with chirality imbalance is described by the chiral magnetohydrodynamics (chiral MHD). One such astrophysical system is high-density lepton matter in core-collapse supernovae where the chirality imbalance of leptons is generated by the parity-violating weak processes. After developing the chiral MHD equations for this system, we perform numerical simulations for the real-time evolutions of magnetic and flow fields and study the properties of the chiral MHD turbulence. In particular, we observe the inverse cascade of the magnetic energy and the fluid kinetic energy. Our results suggest that the chiral effects that have been neglected so far can reverse the turbulent cascade direction from direct to inverse cascade, which would impact the magnetohydrodynamics evolution in the supernova core toward explosion.

UR - http://www.scopus.com/inward/record.url?scp=85056162689&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056162689&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.98.083018

DO - 10.1103/PhysRevD.98.083018

M3 - Article

AN - SCOPUS:85056162689

VL - 98

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 8

M1 - 083018

ER -