Observational Analysis on the Early Evolution of a CME Flux Rope: Preflare Reconnection and Flux Rope's Footpoint Drift
文献类型:期刊论文
作者 | Chen HC(陈何超)1,2,3; Yang JY(杨家艳)1,3; Ji KF(季凯帆)1,3; Duan, Yadan4 |
刊名 | ASTROPHYSICAL JOURNAL |
出版日期 | 2019-12-20 |
卷号 | 887期号:2页码:14 |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/ab527e |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | We study the early evolution of a hot-channel-like magnetic flux rope (MFR) toward eruption. Combining with imaging observation and magnetic field extrapolation, we find that the hot channel possibly originated from a preexisting seed MFR with a hyperbolic flux tube (HFT). In the precursor phase, three-dimensional tether-cutting reconnection at the HFT is most likely resulting in the heating and buildup of the hot channel. In this process, the forming hot channel was rapidly enlarged at its spatial size and slipped its feet to two remote positions. Afterward, it instantly erupted outwards with an exponential acceleration, leaving two core dimmings near its feet. We suggest that preflare reconnection at the HFT played a crucial role in enlarging the seed MFR and facilitating the onset of its final solar eruption. Moreover, a recently predicted drifting of MFR's footpoints was detected at both core dimmings. In particular, we find that MFR's west footpoint drift was induced by a new reconnection geometry among the erupting MFR's leg and thereby inclined arcades. As MFR's west footpoints gradually drifted to a new position, a set of newborn atypical flare loops connected into the west core dimming, causing a rapid decrease of dimmed area inside this core dimming and also generating a secondary flare ribbon at their remote feet. This reveals that core dimmings may suffer a pronounced diminishment due to the eruptive MFR's footpoint drift, implying that mapping the real footpoints of the erupting MFR down to the Sun's surface is more difficult than previously thought. |
学科主题 | 天文学 ; 太阳与太阳系 ; 太阳物理学 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
WOS关键词 | QUASI-SEPARATRIX LAYERS ; CORONAL MASS EJECTION ; MAGNETIC RECONNECTION ; SOLAR-FLARES ; H-ALPHA ; MODEL ; RECONSTRUCTION ; CATASTROPHE ; DIMMINGS |
资助项目 | Natural Science Foundation of China (NSFC)[11633008] ; Natural Science Foundation of China (NSFC)[11703084] ; Natural Science Foundation of China (NSFC)[11873088] ; Natural Science Foundation of China (NSFC)[11973085] ; NSFC[11773072] ; NSFC[11873027] ; NSFC[11933009] ; Key Programs of the Chinese Academy of Sciences[QYZDJ-SSW-SLH012] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000506012000012 |
资助机构 | Natural Science Foundation of China (NSFC)[11633008, 11703084, 11873088, 11973085] ; NSFC[11773072, 11873027, 11933009] ; Key Programs of the Chinese Academy of Sciences[QYZDJ-SSW-SLH012] |
源URL | [http://ir.ynao.ac.cn/handle/114a53/22218] |
专题 | 云南天文台_太阳物理研究组 |
通讯作者 | Chen HC(陈何超) |
作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, People's Republic of China 2.University of Chinese Academy of Sciences, 19A Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, People's Republic of China 4.Yunnan Normal University, Department of Physics, Kunming 650500, Yunnan, People's Republic of China |
推荐引用方式 GB/T 7714 | Chen HC,Yang JY,Ji KF,et al. Observational Analysis on the Early Evolution of a CME Flux Rope: Preflare Reconnection and Flux Rope's Footpoint Drift[J]. ASTROPHYSICAL JOURNAL,2019,887(2):14. |
APA | Chen HC,Yang JY,Ji KF,&Duan, Yadan.(2019).Observational Analysis on the Early Evolution of a CME Flux Rope: Preflare Reconnection and Flux Rope's Footpoint Drift.ASTROPHYSICAL JOURNAL,887(2),14. |
MLA | Chen HC,et al."Observational Analysis on the Early Evolution of a CME Flux Rope: Preflare Reconnection and Flux Rope's Footpoint Drift".ASTROPHYSICAL JOURNAL 887.2(2019):14. |
入库方式: OAI收割
来源:云南天文台
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