The intensity of the green line (Fe XIV 5303 ?) is the strongest in the visible spectrum of the solar corona, and this line has been used as long-term powerful diagnostic tools for studying the coronal configurations and hot plasma dynamics. However, it remains unclear and an open question whether there exists close relationship between the green line intensities and the coronal extreme ultraviolet (EUV) line emissions for various coronal structures. In this paper, we use the green-line data by the Lijiang YOGIS Lyot coronagraph and the EUV data from the Solar Dynamics Observatory/Atmospheric Imaging Assembly instruments in order to perform direct comparisons and analyses, based on two algorithms developed to extract particular features in the low corona. It is found that, among the correlation coefficients obtained between the intensities of 5303 ? and the EUV lines, the coefficients between the green line and the 211 ? wavelength for different coronal structures and different limb locations always keep the highest values (ranging from 0.89 to 0.99), which has not been reported before. This result can be helpful and promising to link together the various physical processes involved at different heights in the corona by precisely tracking the bright loops or other features observed in 5303 ? above the limb down to the correct surface locations revealed by the 211 ? data. Furthermore, the ground-based observations of the coronal green line and the space-based EUV observations at 211 ? can advantageously complement each other when there is a need.

Xue-Fei Zhang;Yu Liu;Ming-Yu Zhao;Ji-Hong Liu;Abouazza Elmhamdi;Teng-Fei Song;Zi-Han Li;Hong-Bo Li;Fei-Yang Sha;Jing-Xing Wang;Xiao-Bo Li;Yuan-Deng Shen;Shun-Qing Liu;Hong-Fei Liang;R.M.Al-Shammari

Yunnan Observatories,Chinese Academy of Sciences,Kunming 650011,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shijiazhuang University,Shijiazhuang 050035,China;School of Physical Science and Technology,Southwest Jiaotong University,Chengdu 610031,China;Department of Physics and Astronomy,King Saud University,P.O.Box 2455,Riyadh 11451,Saudi Arabia;Yunnan Normal University,School of Physics and Electronic Information,Kunming 650500,China;Institute of Space Physics,Luoyang Normal University,Luoyang 471934,China

天文和天体物理学研究

[1]Xue-Fei Zhang;Yu Liu;Ming-Yu Zhao;Ji-Hong Liu;Abouazza Elmhamdi;Teng-Fei Song;Zi-Han Li;Hong-Bo Li;Fei-Yang Sha;Jing-Xing Wang;Xiao-Bo Li;Yuan-Deng Shen;Shun-Qing Liu;Hong-Fei Liang;R.M.Al-Shammari-.Comparison of the Coronal Green-line Intensities with the EUV Measurements from SDO/AIA)[J].天文和天体物理学研究,2022(07):191-205

Intensities,XIV,YOGIS,coronagraph,advantageously

Comparison,Coronal,Green,EUV,Measurements,from,SDO,AIA,intensity,green,strongest,visible,spectrum,solar,this,has,been,used,long,term,powerful,diagnostic,tools,studying,coronal,configurations,hot,plasma,dynamics,However,remains,unclear,open,question,whether,there,exists,close,relationship,between,intensities,extreme,ultraviolet,emissions,various,structures,paper,data,by,Lijiang,Lyot,Solar,Dynamics,Observatory,Atmospheric,Imaging,Assembly,instruments,order,perform,direct,comparisons,analyses,two,algorithms,developed,extract,particular,features,low,It,found,that,among,correlation,coefficients,obtained,lines,wavelength,different,limb,locations,always,keep,highest,values,ranging,which,not,reported,before,This,result,can,helpful,promising,link,together,physical,processes,involved,heights,precisely,tracking,bright,loops,other,observed,above,down,correct,surface,revealed,Furthermore,ground,observations,space,complement,each,when,need

0.552273