Analytic solutions for neutrino-light curves of core-collapse supernovae
Analytic solutions for neutrino-light curves of core-collapse supernovae
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DOI：
10.1093/ptep/ptaa154
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发表时间：
2020-08
影响因子：
3.5
通讯作者：
Y. Suwa;A. Harada;K. Nakazato;K. Sumiyoshi
中科院分区：
文献类型：
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作者：
Y. Suwa;A. Harada;K. Nakazato;K. Sumiyoshi
中微子是银河系超新星爆发的可靠信号，也是最有价值的信使，可以为我们提供有关超新星最深处的信息。特别是，中微子将为我们提供物理量，例如质子中子星（PNS）的半径和质量，这是超新星的中心引擎。这需要一个理论模型，将中微子光度和平均能量等可观测量与物理量联系起来。在这里，我们显示的中微子光曲线的解析解来自中微子辐射输运方程采用扩散近似和流体静力学方程的解析密度解的PNS。作为时间的函数的中微子光度和平均能量的明确提出，与PNS质量，半径，中微子的总能量，表面密度和不透明度的依赖。解析解提供了爆炸后几秒钟的数值模型的良好表示，并允许根据观测数据对这些物理量进行粗略估计。
Neutrinos are a guaranteed signal from supernova explosions in the Milky Way, and a most valuable messenger that can provide us with information about the deepest parts of supernovae. In particular, neutrinos will provide us with physical quantities, such as the radius and mass of protoneutron stars (PNS), which are the central engine of supernovae. This requires a theoretical model that connects observables such as neutrino luminosity and average energy with physical quantities. Here, we show analytic solutions for the neutrino-light curve derived from the neutrino radiation transport equation by employing the diffusion approximation and the analytic density solution of the hydrostatic equation for a PNS. The neutrino luminosity and the average energy as functions of time are explicitly presented, with dependence on PNS mass, radius, the total energy of neutrinos, surface density, and opacity. The analytic solutions provide good representations of the numerical models from a few seconds after the explosion and allow a rough estimate of these physical quantities to be made from observational data.