On the Relation between Flare and CME during GLE-SEP and Non-GLE-SEP Events

doi:10.3847/1538-4357/ab3c4e

	On the Relation between Flare and CME during GLE-SEP and Non-GLE-SEP Events
	Firoz,K. A.1,2; Gan,W. Q.2; Moon,Y.-J.1; Rodríguez-Pacheco,J.3; Li,Y. P.2
刊名	The Astrophysical Journal
	2019-09-24
卷号	883 期号:1
关键词	The Sun
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab3c4e
英文摘要	Abstract Association of solar flares and coronal mass ejections (CMEs) with ground-level enhancement (GLE) is a recognized fact, but questions arise when a similar association is observed for non-GLEs. In this respect, we carry out a detailed study of the relation between flare fluences (? J m?2) and CME speeds (Vcme km s?1) during some selected GLEs and non-GLEs. As we found, most of the data points of ? (J m?2) and Vcme (km s?1) of GLEs follow a near-linear trend, with the ? (J m?2) increasing as the Vcme (km s?1) increases, resulting in a strong positive correlation (r?≥?0.82), while the correlation (r?≤?0.47) remains weak for non-GLEs. For any exceptional GLE, the ? (J m?2) and Vcme (km s?1) that do not maintain a near-linear trend over the whole flare phase do maintain at least a minimum rational proportionality over the flare rise phase, whereas this characteristic was not generally observed for non-GLEs. Although the ? (J m?2) and Vcme (km s?1) of some non-GLEs show a trend similar to those of GLEs, they indeed originated over the flare impulsive phases concomitant with coronal shock manifested in m type II bursts, while GLEs originated over the flare initial phase before the m type II. Flare peak fluences (?pk J m?2) and Vcme (km s?1) maintain weak correlation for both GLEs and non-GLEs, likely because the CME main acceleration ceases around the flare peak. However, though the ?pk (J m?2) governs the flare total fluence, it does not blur the correlation between the fluence over the flare rise phase (?r J m?2) and Vcme (km s?1), indicating that the flare peak/strength does not control the GLE occurrence.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-883-1-AB3C4E
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/28010]
专题	中国科学院紫金山天文台
作者单位	1.School of Space Research, Kyung Hee University, Yongin-si, Gyeonggi-do, 17104, Republic of Korea 2.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210008 Nanjing, People's Republic of China 3.Space Research Group, Alcalá University, E-28871 Alcalá de Henares, Spain
推荐引用方式 GB/T 7714	Firoz,K. A.,Gan,W. Q.,Moon,Y.-J.,et al. On the Relation between Flare and CME during GLE-SEP and Non-GLE-SEP Events[J]. The Astrophysical Journal,2019,883(1).
APA	Firoz,K. A.,Gan,W. Q.,Moon,Y.-J.,Rodríguez-Pacheco,J.,&Li,Y. P..(2019).On the Relation between Flare and CME during GLE-SEP and Non-GLE-SEP Events.The Astrophysical Journal,883(1).
MLA	Firoz,K. A.,et al."On the Relation between Flare and CME during GLE-SEP and Non-GLE-SEP Events".The Astrophysical Journal 883.1(2019).