PION：模拟风吹星云
PION: Simulations of Wind-Blown Nebulae
摘要：
我们提出了一个概述PION，一个开源的软件项目，用于解决辐射磁流体力学方程的嵌套网格，旨在模拟大质量恒星周围的非对称星云。简要介绍了一种新的混合型OpenMP/MPI并行算法的实现，并与当前版本进行了比较，证明了该算法的可扩展性。三维模拟的一个扩大星云周围的沃尔夫-拉叶星，然后提出和分析，类似于以前的二维模拟文献。计算了气体的发射量和X射线表面亮度随时间的变化，并与观测结果作了定性比较。
英文摘要：
We present an overview of PION, an open-source software project for solving radiation-magnetohydrodynamics equations on a nested grid, aimed at modelling asymmetric nebulae around massive stars. A new implementation of hybrid OpenMP/MPI parallel algorithms is briefly introduced, and improved scaling is demonstrated compared with the current release version. Three-dimensional simulations of an expanding nebula around a Wolf-Rayet star are then presented and analysed, similar to previous 2D simulations in the literature. The evolution of the emission measure of the gas and the X-ray surface brightness are calculated as a function of time, and some qualitative comparison with observations is made.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
