论文标题
中微子快速风味不稳定性在三维中的中微子不稳定性用于中子星星合并
Neutrino Fast Flavor Instability in three dimensions for a Neutron Star Merger
论文作者
论文摘要
中微子在核心崩溃超新星和中子星星合并中的风味演变是天体物理学中至关重要的未解决的问题。遵循中微子系统的电子风味演变对于计算紧凑物体的热力学以及它们产生的化学元素至关重要。由于多种原因，包括大量的中微子，振荡的小空间尺度以及系统的非线性，准确地考虑这些环境中的风味转化是具有挑战性的。我们通过提出一种描述中微子领域的方法来解决这些问题，从而解决了这些问题。我们将力矩方法应用于中子星的合并条件，并表明它模拟了预计发生这种现象的区域中的快速风味中微子转化。通过与粒子中的计算进行比较，我们表明，力矩方法能够捕获生长，饱和度和反熔的三个阶段，并正确预测了中微子场中增长最快的波动的长度。
The flavor evolution of neutrinos in core collapse supernovae and neutron star mergers is a critically important unsolved problem in astrophysics. Following the electron flavor evolution of the neutrino system is essential for calculating the thermodynamics of compact objects as well as the chemical elements they produce. Accurately accounting for flavor transformation in these environments is challenging for a number of reasons, including the large number of neutrinos involved, the small spatial scale of the oscillation, and the nonlinearity of the system. We take a step in addressing these issues by presenting a method which describes the neutrino fields in terms of angular moments. We apply our moment method to neutron star merger conditions and show it simulates fast flavor neutrino transformation in a region where this phenomenon is expected to occur. By comparing with particle-in-cell calculations we show that the moment method is able to capture the three phases of growth, saturation, and decoherence, and correctly predicts the lengthscale of the fastest growing fluctuations in the neutrino field.
