论文标题
模糊暗物质光环的有效横截面
Effective Cross Section of Fuzzy Dark Matter Halos
论文作者
论文摘要
我们从数值上研究了两个相撞模糊的暗物质孤子的运动，而没有明确的自我交流，并找到了速度耗散变化的有效横截面。事实证明，横截面与速度立方体成反比，我们提出了其分析解释。使用结果，我们在两个模糊的暗物质光环的正面碰撞期间粗略地估计了空间偏移，这可能与某些星系簇碰撞中恒星和暗物质之间的空间偏移有关。我们还表明，重力冷却在碰撞中起着重要作用。
We numerically study the movement of two colliding fuzzy dark matter solitons without explicit self-interaction and find the effective cross section of dissipative change in velocity. The cross section turns out to be inversely proportional to the velocity cubed, and we present its analytic interpretation. Using the result we roughly estimate spatial offsets during head-on collisions of two fuzzy dark matter halos, which can be related to the spatial offsets between stars and dark matter in collisions of some galaxy clusters. We also show that the gravitational cooling plays an important role during the collisions.
