论文标题
动力潮汐锁定理论：暗物质光环的旋转的新来源
Dynamical Tidal Locking Theory: A new source of the Spin of Dark Matter Halos
论文作者
论文摘要
我们重新审视了什么机制负责暗物质旋转的问题。这个问题的答案对于建模星系内在的对齐非常重要，这可能会污染当前和未来的镜头数据。特别是，我们表明，当暗物质光环在密集的环境中几乎彼此之间（即光环组件）几乎彼此传递时，它们通过施加相互潮汐扭矩互相旋转和旋转。我们表明，这对与所谓的潮汐扭矩理论（TTT）计算出的暗物质光环的自旋有重要贡献。我们使用对Illutris的最新模拟结果来检查该理论对模拟数据的预测。
We revisit the question of what mechanism is responsible for the spins of halos of dark matter. The answer to this question is of high importance for modeling galaxy intrinsic alignment, which can potentially contaminate current and future lensing data. In particular, we show that when the dark matter halos pass nearly by each other in dense environments-- namely halo assemblies-- they swing and spin each other via exerting mutual tidal torques. We show that this has a significant contribution to the spin of dark matter halos comparable to that of calculated by the so-called tidal torque theory (TTT). We use the results of state-of-the-art simulation of Illutris to check the prediction of this theory against the simulation data.
