论文标题
潮汐轨迹和人为的干物物光晕的破坏
Tidal Tracks and Artificial Disruption of Cold Dark Matter Halos
论文作者
论文摘要
我们描述了对暗物质Subhalos潮汐加热的现有模型的简单扩展，该模型考虑了潮汐加热的脉冲近似中的二阶项。我们表明，这种修订后的模型可以准确地匹配Subhalos在高分辨率N体模拟中所测量的潮汐轨道。我们进一步证明，当将恒定密度核心引入次音时，该模型能够定量再现由有限分辨率效应引起的N体Subhalos的进化和人为破坏。结合这些结果，我们确认了先前的工作，表明N体模拟中的人工破坏可能导致两个因子低估了宿主光晕内部区域的subhalo质量功能，而整个病毒量的降低了10--20％。
We describe a simple extension to existing models for the tidal heating of dark matter subhalos which takes into account second order terms in the impulse approximation for tidal heating. We show that this revised model can accurately match the tidal tracks along which subhalos evolve as measured in high-resolution N-body simulations. We further demonstrate that, when a constant density core is introduced into a subhalo, this model is able to quantitatively reproduce the evolution and artificial disruption of N-body subhalos arising from finite resolution effects. Combining these results we confirm prior work indicating that artificial disruption in N-body simulations can result in a factor two underestimate of the subhalo mass function in the inner regions of host halos, and a 10--20% reduction over the entire virial volume.
