论文标题
Presupernova中微子对恒星进化模型的敏感性
The sensitivity of presupernova neutrinos to stellar evolution models
论文作者
论文摘要
我们研究了中微子排放对15 $ m_ \ odot $祖细胞的恒星进化模型的敏感性，在崩溃之前特别注意一个阶段。我们证明了电子型中微子（$ν_e$）及其反伙伴（$ \barν_e$）的数量亮度均通过更改空间分辨率和核网络大小而在Stellar Evolution模型上的数量级有所不同。我们还开发了一个现象学模型来捕获多样性的基本趋势，其中中微子亮度表示为中央密度，温度和电子分数的函数。在分析中，我们表明中微子的光度可以通过这些中心量很好地表征。该分析还表明，$ν_e$亮度的时间演变最有影响力的数量是物质密度，而温度为$ \barν_e$。这些定性趋势将是有用的，并且适用于在未来中微子观察结果的恒星进化的最后阶段限制祖细胞的物理状态，尽管需要更详细的系统研究，包括各种质量祖细胞来评估适用性。
We examine the sensitivity of neutrino emissions to stellar evolution models for a 15$M_\odot$ progenitor, paying particular attention to a phase prior to the collapse. We demonstrate that the number luminosities in both electron-type neutrinos ($ν_e$) and their anti-partners ($\barν_e$) differ by more than an order of magnitude by changing spatial resolutions and nuclear network sizes on stellar evolution models. We also develop a phenomenological model to capture the essential trend of the diversity, in which neutrino luminosities are expressed as a function of central density, temperature and electron fraction. In the analysis, we show that neutrino luminosity can be well characterized by these central quantities. This analysis also reveals that the most influential quantity to the time evolution of $ν_e$ luminosity is matter density, while it is temperature for $\barν_e$. These qualitative trends will be useful and applicable to constrain the physical state of progenitors at the final stages of stellar evolution from future neutrino observations, although more detailed systematic studies including various mass progenitors are required to assess the applicability.
