平滑粒子流体动力学(SPH)数值模拟中的重子物理

Baryonic Physics in Cosmological Smoothed Particle Hydrodynamics Simulations

平滑流体动力学(SPH)数值模拟是我们研究星系形成与演化的一个重要工具。先介绍了SPH的基本原理和基本方程,然后以恒星形成、星系风反馈、AGN反馈和热传导为例,介绍了平滑流体动力学数值模拟中的重子物理及实施方法。这些模型在一定程度上都取得了成功,对更好地理解星系的形成和演化起到了促进作用。

The smoothed particle hydrodynamics （SPH） simulation is a powerful tool in studying galaxy formation and evolution. In this review, standard formulation of SPH is summarized. And then the implementation of baryonie physics in cosmological SPH simulations are illustrated, including star formation, galactic wind feedback, AGN feedback, and thermal conduction. During the past years, much progress has been made on improving the physical modeling in hydrodynamical simulations, by invoking more sophisticated treatments of star formation, supernovae feedback, AGN feedback and so on. The implementation of these baryonic physics in SPH simulations has helped us a lot in understanding how galaxies form and evolve in the universe. However, due to our limited knowledge of these baryonic physics, these models are still far from being perfect. Many further studies are therefore needed in future to improve these physical modeling in simulations.