A Complex Solar Coronal Jet with Two Phases

被引：15
作者：
Chen, Jie [1 ,2 ]
Su, Jiangtao [1 ,3 ]
Deng, Yuanyong [1 ]
Priest, E. R. [4 ]
机构：
[1] Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
[2] Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China
[3] Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
[4] Univ St Andrews, Math Inst, St Andrews KY16 9SS, Fife, Scotland
来源：
ASTROPHYSICAL JOURNAL | 2017年 / 840卷 / 01期
基金：
中国国家自然科学基金;
关键词：
magnetic reconnection; magnetohydrodynamics (MHD); Sun: activity; Sun: corona; Sun: magnetic fields; X-RAY JETS; H-ALPHA SURGES; MOVING MAGNETIC FEATURES; NUMERICAL-SIMULATION; ACTIVE-REGION; BLOWOUT JET; FLUX EMERGENCE; RECONNECTION; MICROFLARES; DICHOTOMY;
D O I：
10.3847/1538-4357/aa6c59
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Jets often occur repeatedly from almost the same location. In this paper, a complex solar jet was observed with two phases to the west of NOAA AR 11513 on 2012 July 2. If it had been observed at only moderate resolution, the two phases and their points of origin would have been regarded as identical. However, at high resolution we find that the two phases merge into one another and the accompanying footpoint brightenings occur at different locations. The phases originate from different magnetic patches rather than being one phase originating from the same patch. Photospheric line of sight (LOS) magnetograms show that the bases of the two phases lie in two different patches of magnetic flux that decrease in size during the occurrence of the two phases. Based on these observations, we suggest that the driving mechanism of the two successive phases is magnetic cancellation of two separate magnetic fragments with an opposite-polarity fragment between them.
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页数：8
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