Comparing Treatments of Weak Reactions with Nuclei in Simulations of Core-collapse Supernovae
Comparing Treatments of Weak Reactions with Nuclei in Simulations of Core-collapse Supernovae
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DOI：
10.3847/1538-4365/aafac9
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发表时间：
2018-12
期刊：
影响因子：
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通讯作者：
H. Nagakura;S. Furusawa;H. Togashi;S. Richers;K. Sumiyoshi;S. Yamada
中科院分区：
文献类型：
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作者：
H. Nagakura;S. Furusawa;H. Togashi;S. Richers;K. Sumiyoshi;S. Yamada
我们进行了广泛的研究核弱相互作用对核心坍缩超新星的影响，特别注意状态方程（EOS）和核弱相互作用的核丰度之间的一致性。我们基于变分方法计算均匀物质的性质。对于非均匀核物质，我们考虑了各种有限密度和热效应的核的完整系综，并直接使用核丰度计算核弱相互作用率。为了量化一致的治疗对CCSN动力学的核丰度的影响，我们进行了球对称CCSN模拟与完整的玻尔兹曼中微子输运，系统地改变弱相互作用，EOS和祖模型的治疗。我们发现，不一致的处理之间的EOS和弱相互作用率的核丰度削弱了EOS的动力学和中微子信号的依赖。我们还测试了两个人工处方的有效性轻核弱相互作用，发现这两个处方影响的动力学。此外，中微子的光度与基准模型的中微子光度相差约10%，中微子的平均能量相差约0.25-1 MeV。我们还发现，中子化爆发中微子信号依赖于祖更强烈的EOS，防止检测到这个信号约束的EOS。
We perform an extensive study of the influence of nuclear weak interactions on core-collapse supernovae, paying particular attention to consistency between nuclear abundances in the equation of state (EOS) and nuclear weak interactions. We compute properties of uniform matter based on the variational method. For inhomogeneous nuclear matter, we take a full ensemble of nuclei into account with various finite-density and thermal effects and directly use the nuclear abundances to compute nuclear weak interaction rates. To quantify the impact of a consistent treatment of nuclear abundances on CCSN dynamics, we carry out spherically symmetric CCSN simulations with full Boltzmann neutrino transport, systematically changing the treatment of weak interactions, EOSs, and progenitor models. We find that the inconsistent treatment of nuclear abundances between the EOS and weak interaction rates weakens the EOS dependence of both the dynamics and neutrino signals. We also test the validity of two artificial prescriptions for weak interactions of light nuclei and find that both prescriptions affect the dynamics. Furthermore, there are differences in neutrino luminosities by ∼10% and in average neutrino energies by 0.25–1 MeV from those of the fiducial model. We also find that the neutronization burst neutrino signal depends on the progenitor more strongly than on the EOS, preventing a detection of this signal from constraining the EOS.