不同速度日冕物质抛射的多波段射电观测特征  

Observational Characteristics of Multi-wavelength Radio Emissions Associated with Different Velocities of Solar Coronal Mass Ejection

作　　者：谢瑞祥[1] 龚玲平 施硕彪[1] 

机构地区：[1]中国科学院国家天文台云南天文台,云南昆明6500111 [2]云南广播电视大学,云南昆明650023

出　　处：《天文研究与技术》2008年第1期13-20,共8页Astronomical Research & Technology

基　　金：973项目(2006CB806300);国家自然科学基金(1033303010473020)资助;中国科学院"西部之光"项目的支持

摘　　要：比较了12个日冕物质抛射(CME)事件,发现它们可以分为两类,其中分别是快速(>1000 km/s)和慢速(≤800 km/s)各6个事件,发现这2类CME事件分别对应于不同的多波段射电辐射类型和不同的日冕磁位形。本文定性地分析了这二个类型的射电爆发的产生过程,指出多重磁极和双磁极结构可能是分别产生二类CME和二类多波段射电爆发类型的原因,并涉及到"磁崩溃"模型与多重磁结构的关系。讨论了CME的不同速度可能是造成多波段不同射电爆发的主要因素,并指出快速或慢速的CME可能取决于日冕的多重或双重磁结构。12 Solar Coronal Mass Ejection （CME） events are compared. It is found that 6, out of 12 events, are fast （ 〉 1000 km/s） CMEs and 6, out of 12 events, are slow （ ≤ 800 km/s） CMEs. In particular, It is found that two types of CMEs are corresponding to the different types of multi-wavelength radio emissions, and to the different coronal magnetic configurations, respectively. In this paper, the producing processes of radio bursts with different types are analyzed qualitatively. The multi-polar and bi-polar magnetic structures are indicated, and they are likely to be the causes produced the two types of CMEs and the different types of muhi-wavelength radio burst, respectively. The correlation between the ＂magnetic breakout＂ model for CME initiation/flare triggering and the multi-polar magnetic structure is concerned. The different velocities of CMEs may be the key factor causing different types of multi-wavelength radio bursts, and the fast or slow CMEs may be attributed to the multi-polar or bi-polar coronal magnetic structures.

关 键 词：太阳 CME 射电爆发 日冕磁结构 

分 类 号：P162.11[天文地球—天文学]