Home > Papers

 
 
Waiting times of Quasi-homologous Coronal Mass Ejections from Super Active Regions
Yuming Wang *,Lijuan Liu #,Chenglong Shen,Rui Liu,S.Wang
CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Sciences, University of Science and Technolgy of China, Hefei, Anhui 230026, China
*Correspondence author
#Submitted by
Subject:
Funding: 973 key project（No.2001CB811403）, 100-Talent Program, NSF（No.41131065,40904046,40874075,41121003）, CAS Key Research Program（No.KZZD-EW-01）
Opened online: 7 March 2013
Accepted by: none
Citation: Yuming Wang,Lijuan Liu,Chenglong Shen.Waiting times of Quasi-homologous Coronal Mass Ejections from Super Active Regions[OL]. [ 7 March 2013] http://en.paper.edu.cn/en_releasepaper/content/4522873
 
 
Why and how may some active regions (ARs) frequently produce coronal mass ejections (CMEs)? It is one of the key questions to deepen our understanding of the mechanisms and processes of energy accumulation and sudden release in ARs and to improve our capability of space weather prediction. Although some case studies have been made, the question is still far from fully answered. This issue is now being tried to address statistically through an investigation of waiting times of quasi-homologous CMEs from super ARs in solar cycle 23. It is found that the waiting times of quasi-homologous CMEs have a two-component distribution with a separation at about 18 hours, the peak waiting time of the first component is at about 7 hours, and the likelihood of occurrences of two or more CMEs faster than 1200 km /s within 18 hours is about 20%. Furthermore, the correlation analysis among CME waiting times, CME speeds and CME occurrence rates reveals that these quantities are independent to each other, suggesting that the perturbation by preceding CMEs rather than free energy input be the direct cause of quasi-homologous CMEs. The peak waiting time of 7 hours probably characterize the time scale of the growth of instabilities triggered by preceding CMEs. This study uncovers more clues for us to understand quasi-homologous CMEs as well as CME-rich ARs.
Keywords:Space Physics; Sun; coronal mass ejections; instabilities
 
 
 

For this paper
  • ● PDF (0B)
  • ● Revision 0 　　
  • ● Print this paper
  • ● Recommend this paper to a friend
  • ● Add to my favorite list

    Saved Papers

    Please enter a name for this paper to be shown in your personalized Saved Papers list

Tags
Add yours

Related Papers

Statistics
PDF Downloaded 190
Bookmarked 0
Recommend 5
Comments Array
Submit your papers