Influence of coronal holes on CMEs in causing SEP events  

作　　者：Cheng-Long Shen Jia Yao Yu-Ming Wang Pin-Zhong Ye Xue-Pu Zhao Shui Wang 

机构地区：[1]CAS Key Laboratory of Basic Plasma Physics, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China [2]State Key Laboratory of Space Weather, Chinese Academy of Science, Beijing 100080, China [3]W. W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305, USA

出　　处：《Research in Astronomy and Astrophysics》2010年第10期1049-1060,共12页天文和天体物理学研究（英文版）

基　　金：supported by grants from the National Natural Science Foundation of China(Grant Nos.40904046,40874075 and 40525014);the 973 National Basic Research Program(2006CB806304);the Ministry of Education of China(200530);the Program for New Century Excellent Talents in University(NCET-08-0524);the Chinese Academy of Sciences(KZCX2-YW-QN511, KJCX2-YW-N28 and the startup fund)

摘　　要：The issue of the influence of coronal holes （CHs） on coronal mass ejections （CMEs） in causing solar energetic particle （SEP） events is revisited. It is a continuation and extension of our previous work, in which no evident effects of CHs on CMEs in generating SEPs were found by statistically investigating 56 CME events. This result is consistent with the conclusion obtained by Kahler in 2004. We extrapolate the coronal magnetic field, define CHs as the regions consisting of only open magnetic field lines and perform a similar analysis on this issue for 76 events in total by extending the study interval to the end of 2008. Three key parameters, CH proximity, CH area and CH relative position, are involved in the analysis. The new result confirms the previous conclusion that CHs did not show any evident effect on CMEs in causing SEP events.The issue of the influence of coronal holes （CHs） on coronal mass ejections （CMEs） in causing solar energetic particle （SEP） events is revisited. It is a continuation and extension of our previous work, in which no evident effects of CHs on CMEs in generating SEPs were found by statistically investigating 56 CME events. This result is consistent with the conclusion obtained by Kahler in 2004. We extrapolate the coronal magnetic field, define CHs as the regions consisting of only open magnetic field lines and perform a similar analysis on this issue for 76 events in total by extending the study interval to the end of 2008. Three key parameters, CH proximity, CH area and CH relative position, are involved in the analysis. The new result confirms the previous conclusion that CHs did not show any evident effect on CMEs in causing SEP events.

关 键 词：acceleration of particles -- Sun coronal mass ejections -- Sun coronal holes -- Sun particle emission 

分 类 号：P182.62[天文地球—天文学] P182.24