天文学进展2016，Vol.34Issue(4)：425-449,25.DOI:10.3969/j.issn.1000-8349.2016.04.06
外日球层太阳风“磁流体－能量粒子”强耦合系统的数值模拟
Numerical Simulation of Strong Coupling between Magneto-fluid and Energetic Particles in the Outer Heliosphere
摘要
Abstract
The heliosphere refers to a vast volume of the supersonic solar wind outflow confined by its surrounding interstellar medium. The interaction between the magnetized solar wind and interstellar medium results in the multi-layered structures of termination shock, heliosheath, and heliopause. In the outer heliosphere, the solar wind has some quasi-static structures such as cosmic ray radiation, spiral interplanetary magnetic field, and planetary magnetosphere. Via a charge-exchange mechanism, Some solar wind ions and interstellar neutral atoms are converted into energetic neutral atoms (ENAs) and pickup ions respectively. A trapping of the pickup ions results in a continuous heating and decelerating of the solar wind in the outer heliosphere. The strong coupling between ENA radiation and magnetized fluid exists in the outer heliosphere. The ENA becomes a sample of its originating plasma in mass and energy, thus acting as a probe for diagnosing the parent plasma in the remote heliosphere. An ENA mapping of the whole sky map in multiple energy channels give a panorama view of the heliosphere. The radiation-magnetohydrodynamic (RMHD) theory is generally used to mathematically describe the multi-scale coupling between the macroscopic dynamics of the outer heliosphere and the kinetic acceleration/transportation of energetic particles. In this paper, we identify the key scientific questions of the solar wind physics in the outer heliosphere, formulate the constituent RMHD physics models and numerical solutions, analyze the past and present international statuses of numerical RMHD simulation, and propose the viable suggestions to develop numerical RMHD models of the outer heliosphere in China.关键词
辐射磁流体力学/能量中性原子/外日球层/太阳风Key words
radiation MHD/energetic neutral particle/outer heliosphere/solar wind分类
天文与地球科学引用本文复制引用
熊明,李波..外日球层太阳风“磁流体－能量粒子”强耦合系统的数值模拟[J].天文学进展,2016,34(4):425-449,25.基金项目
国家自然科学基金(41374175,41531073,41174154,41274176,41474149) （41374175,41531073,41174154,41274176,41474149）
