The Boltzmann-radiation-hydrodynamics Simulations of Core-collapse Supernovae with Different Equations of State: The Role of Nuclear Composition and the Behavior of Neutrinos
The Boltzmann-radiation-hydrodynamics Simulations of Core-collapse Supernovae with Different Equations of State: The Role of Nuclear Composition and the Behavior of Neutrinos
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DOI：
10.3847/1538-4357/abb5a9
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发表时间：
2020-03
期刊：
影响因子：
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通讯作者：
A. Harada;H. Nagakura;W. Iwakami;Hirotada Okawa;S. Furusawa;K. Sumiyoshi;H. Matsufuru;S. Yamada
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文献类型：
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作者：
A. Harada;H. Nagakura;W. Iwakami;Hirotada Okawa;S. Furusawa;K. Sumiyoshi;H. Matsufuru;S. Yamada
利用Boltzmann辐射流体动力学程序求解中微子输运的Boltzmann方程，我们给出了用Lattimer和Swesty（LS）和Furusawa和Shen（FS）的核状态方程（EOSs）模拟的结果。我们延长了LS模型的模拟时间，并进行了深入的调查，虽然我们以前的论文简要报告了一些结果。只有LS模型显示了激波复活。这似乎源于核组成：不同的核组成导致不同的能量损失由光解，因此不同的强度的瞬发对流和后来的中微子驱动的对流。FS模型中的质子中子星星比LS模型中的更为紧凑，因为多核物质的存在软化了物态方程。对于中微子的行为，我们研究了中微子的通量和爱丁顿张量。在光学厚区，中微子的扩散和物质运动的拖曳决定了通量。在光学薄区，自由流决定了它的大小，并将爱丁顿张量与由M1-闭包关系得到的张量进行了比较。M1-封闭方案高估了速度依赖项在非透明区域的贡献。
Using the Boltzmann-radiation-hydrodynamics code, which solves the Boltzmann equation for neutrino transport, we present the results of the simulations with the nuclear equations of state (EOSs) of Lattimer and Swesty (LS) and Furusawa and Shen (FS). We extend the simulation time of the LS model and conduct thorough investigations, though our previous paper briefly reported some of the results. Only the LS model shows the shock revival. This seems to originate from the nuclear composition: the different nuclear composition results in the different energy loss by photodissociation and hence the different strength of the prompt convection and the later neutrino-driven convection. The protoneutron star seen in the FS model is more compact than that in the LS model because the existence of multinuclear species softens the EOS. For the behavior of neutrinos, we examined the flux and the Eddington tensor of neutrinos. In the optically thick region, the diffusion of neutrinos and the dragging by the motion of matter determine the flux. In the optically thin region, the free-streaming determines it. The Eddington tensor is compared with that obtained from the M1-closure relation. The M1-closure scheme overestimates the contribution from the velocity-dependent terms in the semitransparent region.