Understanding the origin of dark matter cores

请注意，这个学生还没有开始，我总是允许学生在定义自己的项目时有一些余地。然而，这里是我将建议的领域的轮廓。暗物质在星系中分布的方式，可能是暗物质本身性质的一个指标。由于引力坍缩将不同类型的粒子捆绑在一起，它们的行为方式也不同。然而，令人困惑的是，星系内恒星反馈产生的快速变化的引力势可以改变单个暗物质粒子的轨道（Pontzen & Governato 2012）。这可能会改变星系中心附近暗物质的分布，在我们希望利用星系观测来限制暗物质粒子类型之前，必须充分了解这一过程。在这里，我们将使用STFC DIRAC设备进行的最先进的1pc分辨率模拟，结合新的分析计算，来完善我们对引力势变化如何导致暗物质的理解。

Please note that this student has yet to start, and I always allow students some leeway in defining their own project. However, here is the outline of the area I will be suggesting.The way that dark matter is distributed through galaxies is, potentially, an indicator of the nature of dark matter itself. Different types of particle behave in different ways as gravitational collapse binds them together. However, confusing this link is the fact that rapidly changing gravitational potentials, generated by stellar feedback within galaxies, can alter the orbit of individual dark matter particles (Pontzen & Governato 2012). This can change the distribution of dark matter near the galaxy centre, a process that must be fully understood before we have a hope of using observations of galaxies to constrain the dark matter particle type. Here, we will use state-of-the-art, 1pc-resolution simulations performed using the STFC DIRAC facility, combined with new analytic calculations, to refine our understanding of how changing gravitational potentials resculpt dark matter.