标题： M1中微子输运在数值相对论代码BAM中的应用及其对低质量双中子星合并的应用 显示英文标题

标题： M1 neutrino transport within the numerical-relativistic code BAM with application to low mass binary neutron star mergers

摘要： 中微子相互作用对于准确理解双中子星合并过程是至关重要的。 在本文中，我们扩展了广为人知的数值相对论代码BAM的代码基础设施，该代码直到最近还忽略了中微子驱动的相互作用。 事实上，虽然以前的工作已经允许使用核表态方程并采用中微子泄漏方案，但我们通过实现一种一阶多极辐射传输方案（M1）来推进了中微子的对流。 在对一组标准场景进行测试后，我们将它应用于四个低质量双星系统的演化，并对抛射物特性进行了分析。 我们还表明，我们的新抛射物分析基础设施能够为代码$\texttt{POSSIS}$和$\texttt{Skynet}$提供数值相对论相关的输入，分别用于千新星光变曲线和核合成产物的计算。 显示英文摘要

摘要： Neutrino interactions are essential for an accurate understanding of the binary neutron star merger process. In this article, we extend the code infrastructure of the well-established numerical-relativity code BAM that until recently neglected neutrino-driven interactions. In fact, while previous work allowed already the usage of nuclear-tabulated equations of state and employing a neutrino leakage scheme, we are moving forward by implementing a first-order multipolar radiation transport scheme (M1) for the advection of neutrinos. After testing our implementation on a set of standard scenarios, we apply it to the evolution of four low-mass binary systems, and we perform an analysis of ejecta properties. We also show that our new ejecta analysis infrastructure is able to provide numerical relativity-informed inputs for the codes $\texttt{POSSIS}$ and $\texttt{Skynet}$, for the computation of kilonova lightcurves and nucleosynthesis yields, respectively.