Chiral magnetohydrodynamic turbulence in core-collapse supernovae
Chiral magnetohydrodynamic turbulence in core-collapse supernovae
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DOI：
10.1103/physrevd.98.083018
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发表时间：
2018-05
影响因子：
5
通讯作者：
Y. Masada;K. Kotake;T. Takiwaki;N. Yamamoto
中科院分区：
文献类型：
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作者：
Y. Masada;K. Kotake;T. Takiwaki;N. Yamamoto
手征磁流体动力学（手征MHD）描述了手征不平衡的相对论带电物质的宏观演化。一个这样的天体物理系统是高密度轻子物质的核心坍缩超新星，轻子的手征不平衡的宇称破坏弱过程产生的。在建立了该系统的手征MHD方程后，我们对磁场和流场的实时演化进行了数值模拟，并研究了手征MHD湍流的性质。特别是，我们观察到的磁能和流体动能的逆级联。我们的研究结果表明，迄今为止被忽略的手征效应可以扭转湍流级联方向从直接到反级联，这将影响磁流体动力学演化的超新星核心爆炸。
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.