AI 中文总结
综述基于光滑粒子流体动力学方法的致密天体模拟现状，先介绍牛顿理想气体动力学下该方法基础与进展，再阐述广义相对论SPH，最后聚焦天体物理学中白矮星、中子星等系统模拟，涵盖引力波驱动合并及动态碰撞情况。
AI 中文摘要
我们回顾了基于光滑粒子流体动力学（SPH）方法的致密天体模拟的当前状态。本综述的第一部分致力于介绍SPH作为牛顿理想气体动力学的数值方法，内容相当完整。它从该方法的基础开始，还描述了包括各种无网格导数或处理激波方法在内的最新进展。单独一章总结了广义相对论SPH，包括其狭义相对论极限，并详细解释了SPH中全数值相对论的最新发展，其中物质与动态时空一起演化。综述的其余部分聚焦于天体物理学，我们讨论了白矮星 - 白矮星、中子星 - 中子星和中子星 - 黑洞系统模拟的现状。对于每种系统类型，重点是引力波驱动的合并，但我们也简要总结了在恒星密度大的区域可能发生的动态碰撞。
英文摘要
We review the current status of compact object simulations that are based on the Smoothed Particle Hydrodynamics (SPH) method. The first section of this review is dedicated to SPH as a numerical method for Newtonian, ideal gas dynamics and it should be fairly self-contained. It begins with the basics of the method, but also describes recent advances including various meshless derivatives or methods for treating shocks. A separate chapter summarizes general relativistic SPH, including its special relativistic limit, and it explains in some detail the recent development of full numerical relativity in SPH where matter is evolved together with a dynamical spacetime. The remainder of the review has an astrophysical focus, here we discuss the status of the simulations of white dwarf--white dwarf, neutron star--neutron star and neutron star--black hole systems. For each type of system the emphasis is on gravitational-wave-driven mergers, but we also briefly summarize dynamical collisions that can occur in locations with large stellar densities.
CommentsLiving Reviews of Computational Astrophysics; completely revised version; 183 pages; first three chapters are a self-contained review of SPH
