论文标题
一个新的模型，用于在银河形成i的模拟中包括银河风：引入物理进化的风（PHEW）模型
A New Model For Including Galactic Winds in Simulations of Galaxy Formation I: Introducing the Physically Evolved Winds (PhEW) Model
论文作者
论文摘要
银河光环中冷银河风的传播和演变对于星系形成模型至关重要。然而，由于缺乏数值分辨率，并且经常忽略了诸如流体动力学不稳定性和热传导之类的关键物理过程，因此在星系形成的流体动力学模拟中进行建模被过度简化。我们提出了一个分析模型，即物理进化的风（PHEW），该模型可以通过统一的环境介质进行辅助移动的单个云的演变。我们的模型从非常高分辨率的云灌溉模拟中重现了预测，这些模拟包括各种物理条件范围内的各向同性热传导。我们讨论了该模型在星系形成的宇宙流体动力学模拟中的实施，作为对银河系风的亚网格处方，可以在物理和数值上更加牢固。
The propagation and evolution of cold galactic winds in galactic haloes is crucial to galaxy formation models. However, modelling of this process in hydrodynamic simulations of galaxy formation is over-simplified owing to a lack of numerical resolution and often neglects critical physical processes such as hydrodynamic instabilities and thermal conduction. We propose an analytic model, Physically Evolved Winds (PhEW), that calculates the evolution of individual clouds moving supersonically through a uniform ambient medium. Our model reproduces predictions from very high resolution cloud-crushing simulations that include isotropic thermal conduction over a wide range of physical conditions. We discuss the implementation of this model into cosmological hydrodynamic simulations of galaxy formation as a sub-grid prescription to model galactic winds more robustly both physically and numerically.
