太阳的磁绳暗条和一个Ⅲ_b级耀斑  

A Ⅲ_b Flare and a Rope-Shaped Filament

作　　者：张延安[1] 宋慕陶[1] 季海生[1] 

机构地区：[1]中国科学院紫金山天台,南京210008

出　　处：《天文学报》2002年第3期236-241,T001,T002,共8页Acta Astronomica Sinica

基　　金：国家自然科学重点基金(19833050)资助

摘　　要：2000年9月14-18日在紫金山天文台赣榆观测站观测到太阳上有一个中小型活动区,黑子面积不大,但有一个奇特的活动区暗条,16日产生了一个Ⅲb级耀斑,有较强的地球物理效应.计算该区的磁结构,结果发现此磁绳状暗条与磁中性线附近低磁弧系相关,磁场在磁绳附近有强剪切,QSL分析显示三维磁重联能够在暗条附近出现,这可解释大耀斑的形成.A tiny active region NOAA9165 with its sunspots of ~700x10-6 disk area is observed at Ganyu-station, Purple Mountain Observatory. It contains a peculiar active spiral filament near which occurs a large flare of IIIb importance with a relatively strong geophysical effect. Computing its magnetic topology we discover that such spiral filament is associated with the lower height-located magnetic loop systems and the strong magnetic shear near the inversion line of magnetic field. Using QSL analysis, it is shown that 3D-magnetic reconnection may happen in the vicinity of this filament which can be used to explain the IIIb flare appearance.

关 键 词：磁绳暗条 太阳 耀斑 MHD 黑子 QSL分析 

分 类 号：P182.52[天文地球—天文学]