论文标题
带有Ramses代码的星系尺度上的偶极暗物质模拟
Dipolar dark matter simulations on galaxy scales with the RAMSES code
论文作者
论文摘要
我们根据引力极化的概念在银河系上进行数值探索偶极暗物质（DM）模型。该DM模型被认为是繁殖观察到的紧密银河缩放关系的一种自然方法，例如Baryonic Tully-Fisher关系和径向加速关系。我们提出了\ texttt {Ramses}代码的自定义版本，包括首次在$ n $ body模拟中的偶性DM的动力学。作为该代码的第一个应用，我们检查是否恢复了通过分析发现的平衡构型，其中低密度偶极DM Halo相对于其中央星系处于静止状态，从而恢复了上述缩放关系。该平衡模型的特征标志是，它具有具有特征时间的动力不稳定性，具体取决于偶极DM光晕密度，我们以数值恢复。这是迈向测试该框架所需的更多涉及模拟的第一步，从星系相互作用到结构形成。
We numerically explore on galaxy scales the Dipolar dark matter (DM) model based on the concept of gravitational polarization. This DM model has been proposed as a natural way to reproduce observed tight galactic scaling relations such as the baryonic Tully-Fisher relation and the Radial Acceleration Relation. We present a customized version of the \texttt{RAMSES} code including for the first time the dynamics of this Dipolar DM in $N$-body simulations. As a first application of this code, we check that we recover an equilibrium configuration that had been found analytically, where a low density Dipolar DM halo is at rest with respect to its central galaxy, recovering the aforementioned scaling relations. A characteristic signature of this equilibrium model is that it harbours a dynamical instability with a characteristic time depending on the Dipolar DM halo density, which we recover numerically. This represents a first step towards more involved simulations needed to test this framework, ranging from galaxy interactions to structure formation.
