紫金山天文台赣榆观测站精细结构望远镜终端系统改造及最新观测结果  

Reform of Telescopic Terminal System for the Fine-Heliograph at Gan-Yu Station of Purple Mountain Observatory and Recent New Solar-Observations

作　　者：张延安[1] 宋慕陶[1] 季海生[1] 黄光力[1] 张晓祥[1] 姚大志[1] 

机构地区：[1]中国科学院紫金山天文台,南京210008

出　　处：《天文学报》2006年第4期387-393,共7页Acta Astronomica Sinica

基　　金：国家自然科学基金(J951-1-305;19791090;10473024)资助项目

摘　　要：为了观测太阳耀斑高速电子轰击色球,紫金山天文台赣榆观测站将原精细结构望远镜改造为高速CCD精细结构望远镜,拍摄到局部H_α活动区．在光学系统里增加缩焦器,引进干涉偏振滤光片后,高速CCD就能记录H_α各波段的单色像．经过1999年至2004年的反复试验和改进,目前H_α图像的空间分辨率己达1个角秒,时间分辨率为每秒钟30至40帧图像．2004年11月观测到一个M1．1级耀斑,我们将H_α紫移(H_α-0．5(?))高速图像和硬X-射线暴、射电微波暴比较,结果发现：初始的耀斑成对亮点在上升相相互靠近,特别是微波暴源也显出类似的靠近运动,以前从未观测到这种现象,它可解释为磁弧脚根沿中性线的剪切运动．For the purpose of observing high - speed electrons bombarding solar chromcsphere, the original fine Hα- heliograph at Gan-Yu station has been reformed, using CCD- fast terminal to record local Hα- active regions. Inserting a focus - shorten device in the original optical system and introducing an optical - interference slate - filter, we obtain various images in Ha- spectroscopic region through the fast- CCD. After elaborated testing and improvement during the year 1999--2004, this reformation is completed with a good result： the space - resolution attains 1 arc second and temporal resolution is better than 40 frames per second. A class - M1.1 flare in November, 2004 is observed in high cadence Hα - 0.5A heliograms. Comparing it with hard X - ray and microwave burst observations, we discovered that a pair of conjugated flare Hα- bright points approach one to another, not the usual way - move apart. Such approaching movement can be explained by bright point＇s moving along the magnetic neutral line.

关 键 词：太阳 耀斑 望远镜 技术 图像处理(高速CCD) 

分 类 号：P182[天文地球—天文学]