论文标题
带有N体模拟的射手座核的暗物质潮汐剥离历史
The Dark Matter Tidal Stripping History of the Sagittarius Core with N-body simulations
论文作者
论文摘要
射手座（SGR）矮人球形银河系的插座是银河系的光环是一个独特的机会，可以理解如何将矮星系的不同组成部分进行潮湿。在这项工作中，我们根据已经成功重现SGR流的模型重建了SGR核心形态和运动学。在这里，我们使用了一个非常高的分辨率模型，该模型几乎可以在SGR核心中解析单个恒星。它重现了大多数观察到的形态和运动学特性，而没有特定的微调。我们还表明，两次在候选人的通道后，暗物质可能几乎被银河系潮汐所剥夺。最后，该模型预测SGR核心将在接下来的2 GYR中完全破坏。
The infall of the Sagittarius (Sgr) Dwarf Spheroidal Galaxy in the Milky Way halo is an unique opportunity to understand how the different components of a dwarf galaxy could be tidally removed. In this work, we reconstruct the Sgr core morphology and kinematics on the basis of a model that has already successfully reproduced the Sgr stream. Here we use a very high resolution model that almost resolves individual stars in the Sgr core. It reproduces most of the observed morphology and kinematic properties, without specific fine-tuning. We also show that the dark matter may have been almost entirely stripped by Milky Way tides after two passages at pericenter. Finally the model predicts that the Sgr core will be fully disrupted within the next 2 Gyr.
