空间等离子体中相干射电辐射过程的粒子模拟研究  

Probing Coherent Radio Radiation Process in Space Plasmas via Full-kinetic Particle-in-Cell(PIC)Simulations

作　　者：周晓伟 吴德金[1] 陈玲 ZHOU Xiao-wei;WU De-jin;CHEN Ling(Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023)

机构地区：[1]中国科学院紫金山天文台,南京210023

出　　处：《天文学报》2023年第3期185-208,共24页Acta Astronomica Sinica

基　　金：国家自然科学基金项目(12003073、42174195、11873018、41531071)资助。

摘　　要：射电辐射机制,尤其是射电暴发现象的相干辐射机制,是天体物理中最复杂、争议最多的电磁辐射机制.由于受到多重物理因素相互牵连的复杂影响,相干射电辐射机制的理论研究存在很大的难度,长期以来在等离子体辐射和电子回旋脉泽辐射这两类相干辐射机制间争议一直不断.近年来,人们开始尝试将粒子数值模拟方法应用于相干射电辐射机制的研究,并已经取得了一些积极的进展.本文将着重介绍近年来的粒子模拟研究工作及其取得的主要进展,并对现存的一些问题和困难进行简要评述.The radio emission mechanisms,especially the coherent radio emission mechanisms of radio bursts,are one of the most complicated and controversial topics in astrophysics.Due to the complex influence of multiple physical factors,theoretical studies of coherent radio emission mechanisms are very difficult.There has been a constant controversy between the two types of coherent emission mechanisms,i.e.,the plasma emission and the electron cyclotron maser emission,for a long time.In recent years,people have been trying to apply the fully-kinetic Particle-in-Cell(PIC)numerical simulations to the study of coherent radio emissions,and have made some positive progress.In addition to reviewing some existing problems and difficulties in this topic,this paper will focus on the research of PIC simulations for the coherent radio emissions from space plasmas and the main progress in recent years.

关 键 词：等离子体 波 辐射机制:非热 方法:数值 

分 类 号：P144[天文地球—天体物理]