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 

作者机构：CAS Key Laboratory of Basic Plasma Physics School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China State Key Laboratory of Space Weather Chinese Academy of Science Beijing 100080 China W. W. Hansen Experimental Physics Laboratory Stanford University Stanford CA 94305 USA 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2010年第10卷第10期

页      面：1049-1060页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

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) 

主　　题：acceleration of particles -- Sun coronal mass ejections -- Sun coronal holes -- Sun particle emission 

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.