Properties of a Small-scale Short-duration Solar Eruption with a Driven Shock

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	Properties of a Small-scale Short-duration Solar Eruption with a Driven Shock
	Ying, Beili; Feng, Li; Lu, Lei; Zhang, Jie; Magdalenic, Jasmina; Su, Yingna; Su, Yang; Gan, Weiqun
作者部门	空间科学部
发表期刊	ASTROPHYSICAL JOURNAL
	2018
卷号	856 期号:1 页码:24
ISSN	0004-637X
语种	英语
关键词	Shock Waves Sun: Corona Sun: Coronal Mass Ejections (Cmes) Sun: Flares
摘要	Large-scale solar eruptions have been extensively explored over many years. However, the properties of small-scale events with associated shocks have rarely been investigated. We present analyses of a small-scale, short-duration event originating from a small region. The impulsive phase of the M1.9-class flare lasted only four minutes. The kinematic evolution of the CME hot channel reveals some exceptional characteristics, including a very short duration of the main acceleration phase (<2 minutes), a rather high maximal acceleration rate (similar to 50 km s(-2)), and peak velocity (similar to 1800 km s(-1)). The fast and impulsive kinematics subsequently results in a piston-driven shock related to a metric type II radio burst with a high starting frequency of similar to 320 MHz of the fundamental band. The type II source is formed at a low height of below 1.1. R-circle dot less than similar to 2 minutes after the onset of the main acceleration phase. Through the band-split of the type II burst, the shock compression ratio decreases from 2.2 to 1.3, and the magnetic field strength of the shock upstream region decreases from 13 to 0.5 Gauss at heights of 1.1-2.3 R-circle dot. We find that the CME (similar to 4 x 10(30) erg) and flare (similar to 1.6 x 10(30) erg) consume similar amounts of magnetic energy. The same conclusion for large-scale eruptions implies that small-and large-scale events possibly share a similar relationship between CMEs and flares. The kinematic particularities of this event are possibly related to the small footpoint-separation distance of the associated magnetic flux rope, as predicted by the Erupting Flux Rope model.
收录类别	SCI
文献类型	期刊论文
条目标识符	http://ir.nssc.ac.cn/handle/122/6240
专题	空间科学部
通讯作者	Ying, Beili; Feng, Li; Lu, Lei; Zhang, Jie; Magdalenic, Jasmina; Su, Yingna; Su, Yang; Gan, Weiqun
推荐引用方式 GB/T 7714	Ying, Beili,Feng, Li,Lu, Lei,et al. Properties of a Small-scale Short-duration Solar Eruption with a Driven Shock[J]. ASTROPHYSICAL JOURNAL,2018,856(1):24.
APA	Ying, Beili.,Feng, Li.,Lu, Lei.,Zhang, Jie.,Magdalenic, Jasmina.,...&Gan, Weiqun.(2018).Properties of a Small-scale Short-duration Solar Eruption with a Driven Shock.ASTROPHYSICAL JOURNAL,856(1),24.
MLA	Ying, Beili,et al."Properties of a Small-scale Short-duration Solar Eruption with a Driven Shock".ASTROPHYSICAL JOURNAL 856.1(2018):24.

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2018856124.pdf（8764KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	请求全文