Repeated Coronal Condensations Caused by Magnetic Reconnection between Solar Coronal Loops

doi:10.3847/1538-4357/ab4134

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	Repeated Coronal Condensations Caused by Magnetic Reconnection between Solar Coronal Loops
	Li,Leping 1,2,3; Peter,Hardi 4; Chitta,Lakshmi Pradeep 4; Zhang,Jun 1,3; Su,Jiangtao 1,3; Song,Hongqiang 2; Hou,Yijun 1,3; Xia,Chun 5
刊名	The Astrophysical Journal
	2019-10-10
卷号	884 期号:1
关键词	magnetic fields magnetic reconnection plasmas Sun: corona Sun: UV radiation
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab4134
英文摘要	Abstract We recently presented coronal condensations, caused by magnetic reconnection (MR) between coronal loops from extreme ultraviolet observations, over the course of one day, on 2012 January 19. In this paper, by investigating the loops over an extended period of time from January 16 to 20, we present a case for repeated coronal condensations caused by repeated MR between them. In these five days, MR between higher-lying open loops and lower-lying closed loops occurs repeatedly, forming magnetic dips in the higher-lying open loops. During the MR process, cooling and condensation of coronal plasma occur repeatedly. Early on January 16, cooling, but not condensation, of coronal plasma happens. Later, condensation appears at the edge of the dips and falls down along the loops as coronal rains. On January 17, a similar condensation happens at the edge of the higher-lying dips and falls down along the loops. However, another condensation appears in the lower-lying dips and rains down across them. From January 18 to 19, multiple condensations mostly occur at the edge of the dips and fall down both along the loops and across the dips. On January 20, five condensations sequentially appear and rain down across the dips. Overall, 15 condensation events occur in five days, lasting from 0.5 to 15.6 hr. We suggest that the formation of coronal condensations by MR between loops is common in the solar corona. The repeated MR between loops thus plays an essential role in the mass cycle of coronal plasma by initiating repeated catastrophic cooling and condensation.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-884-1-AB4134
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/28422]
专题	中国科学院国家天文台
作者单位	1.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China lepingli@nao.cas.cn 2.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, and Institute of Space Sciences, Shandong University, Weihai, Shandong 264209, People’s Republic of China 3.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 4.Max Planck Institute for Solar System Research, D-37077 G?ttingen, Germany 5.School of Physics and Astronomy, Yunnan University, Kunming 650050, People’s Republic of China
推荐引用方式 GB/T 7714	Li,Leping,Peter,Hardi,Chitta,Lakshmi Pradeep,et al. Repeated Coronal Condensations Caused by Magnetic Reconnection between Solar Coronal Loops[J]. The Astrophysical Journal,2019,884(1).
APA	Li,Leping.,Peter,Hardi.,Chitta,Lakshmi Pradeep.,Zhang,Jun.,Su,Jiangtao.,...&Xia,Chun.(2019).Repeated Coronal Condensations Caused by Magnetic Reconnection between Solar Coronal Loops.The Astrophysical Journal,884(1).
MLA	Li,Leping,et al."Repeated Coronal Condensations Caused by Magnetic Reconnection between Solar Coronal Loops".The Astrophysical Journal 884.1(2019).