Polar plumes observed at the total solar eclipse in 2009  

作　　者：YANG ShuHong ZHANG Jun ZHANG ZhiYong ZHAO ZhaoWang LIU YangBing SONG Qian YANG ShangBin BAO XingMing LI LePing CHU Zhe LI Ting 

机构地区：[1]Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2011年第10期1906-1910,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (11025315, 40890161, 10921303, 41074123, 11003024 and 1100302);the CAS Project KJCX2-YW-T04;the National Basic Research Program of China (Grant No. 2011CB811403);the Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences

摘　　要：During the total solar eclipse of July 22, 2009, we carried out a white-light observation in Anji, Zhejiang, China. The aim wasto observe the polar plumes (PPs) with high spatial and temporal resolutions in white-light. With the observational data, weinvestigate the properties and evolution of the PPs and compare them with those of the low-latitude plumes (LPs). We find thatboth the PPs and the LPs have comparable lengths and widths, and the mean length and width are 300 Mm and 16 Mm, re-spectively. The average inclination angle (13 degree) of the PPs is smaller than that (32 degree) of the LPs. Generally, theplumes which are closer to the coronal hole center are more vertical. We trace the PPs and the LPs in the sequence of imagesand find that none of them disappears and no new one is created. Additionally, neither plasma outflow nor transverse oscilla-tion is observed. These imply that the evolution process of plumes is much longer than the timescale of eclipse.During the total solar eclipse of July 22, 2009, we carried out a white-light observation in Anji, Zhejiang, China. The aim wasto observe the polar plumes （PPs） with high spatial and temporal resolutions in white-light. With the observational data, weinvestigate the properties and evolution of the PPs and compare them with those of the low-latitude plumes （LPs）. We find thatboth the PPs and the LPs have comparable lengths and widths, and the mean length and width are 300 Mm and 16 Mm, re-spectively. The average inclination angle （13 degree） of the PPs is smaller than that （32 degree） of the LPs. Generally, theplumes which are closer to the coronal hole center are more vertical. We trace the PPs and the LPs in the sequence of imagesand find that none of them disappears and no new one is created. Additionally, neither plasma outflow nor transverse oscilla-tion is observed. These imply that the evolution process of plumes is much longer than the timescale of eclipse.

关 键 词：Sun： eclipses Sun： corona Sun： evolution 

分 类 号：P315.7[天文地球—地震学] P343.6[天文地球—固体地球物理学]