论文标题
在银河系的潮汐尾巴上
On the tidal tails of Milky Way globular clusters
论文作者
论文摘要
我们报告了寻找整体运动或结构状况的搜索，这些运动条件已使某种银河系的球状簇目前发展出潮汐尾巴。为此，我们建立了一个全面的球状簇目录，研究的研究集中在其最外面的区域，并将其分为三类：具有观察到的潮汐尾巴的人，具有与潮汐尾巴不同的潮汐特征和没有任何扩展恒星密度谱的签名的潮汐特征。在探索不同的运动学和结构参数空间时，我们发现球状簇 - 无论存在潮汐尾巴，或任何其他类型的潮汐外特征或不存在它们的情况，都表现出类似的行为。通常，轨道相对偏心且非常倾向于对银河系平面的球状簇经历了大量的潮汐破坏。后者还将内部动力学加速到相对高级的进化阶段。这些结果表明，找到任何特定的参数空间和动态条件并非直接，这些条件肯定可以以银河系方式预测沿球形簇的潮汐尾巴。
We report on the search for overall kinematical or structural conditions that have allowed some Milky Way globular clusters to presently develop tidal tails. For this purpose, we build a comprehensive catalogue of globular clusters with studies focused on their outermost regions and classified them in three categories: those with observed tidal tails, those with extra-tidal features different from tidal tails and those without any signature of extended stellar density profiles. When exploring different kinematical and structural parameter spaces, we found that globular clusters - irrespective from the presence of tidal tails, or any other kind of extra-tidal features or the absence of them - behave similarly. In general, globular clusters whose orbits are relatively more eccentric and very inclined respect to the Milky Way plane have undergone a larger amount of mass-loss by tidal disruption. The latter has also accelerated the internal dynamics toward a comparatively more advanced stage of evolution. These outcomes show that it is not straightforward to find any particular set of parameter space and dynamical conditions that can definitely predict tidal tails along globular clusters in the Milky Way.
