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Simultaneous Observations of p-mode Light Walls and Magnetic Reconnection Ejections above Sunspot Light Bridges
Hou, Yijun1,2; Zhang, Jun1,2; Li, Ting1,2; Yang, Shuhong1,2; Li, Xiaohong1,2
2017-10-10
发表期刊ASTROPHYSICAL JOURNAL LETTERS
卷号848期号:1
摘要Recent high-resolution observations from the Interface Region Imaging Spectrograph reveal bright wall-shaped structures in active regions (ARs), especially above sunspot light bridges. Their most prominent feature is the bright oscillating front in the 1400/1330 angstrom channel. These structures are named light walls and are often interpreted to be driven by p-mode waves. Above the light bridge of AR 12222 on 2014 December 06, we observed intermittent ejections superimposed on an oscillating light wall in the 1400 angstrom passband. At the base location of each ejection, the emission enhancement was detected in the Solar Dynamics Observatory 1600 angstrom channel. Thus, we suggest that in wall bases (light bridges), in addition to the leaked p-mode waves consistently driving the oscillating light wall, magnetic reconnection could happen intermittently at some locations and eject the heated plasma upward. Similarly, in the second event occurring in AR 12371 on 2015 June 16, a jet was simultaneously detected in addition to the light wall with a wave-shaped bright front above the light bridge. At the footpoint of this jet, lasting brightening was observed, implying magnetic reconnection at the base. We propose that in these events, two mechanisms, p-mode waves and magnetic reconnection, simultaneously play roles in the light bridge, and lead to the distinct kinetic features of the light walls and the ejection-like activities, respectively. To illustrate the two mechanisms and their resulting activities above light bridges, in this study we present a cartoon model.
文章类型Article
关键词Sun: Activity Sun: Atmosphere Sun: Oscillations Sun: Uv Radiation Sunspots Supporting Material: Animations
WOS标题词Science & Technology ; Physical Sciences
资助者National Natural Science Foundations of China(11533008 ; National Natural Science Foundations of China(11533008 ; Youth Innovation Promotion Association of CAS(2017078 ; Youth Innovation Promotion Association of CAS(2017078 ; 11673035 ; 11673035 ; 2014043) ; 2014043) ; 11673034 ; 11673034 ; 11773039) ; 11773039) ; National Natural Science Foundations of China(11533008 ; National Natural Science Foundations of China(11533008 ; Youth Innovation Promotion Association of CAS(2017078 ; Youth Innovation Promotion Association of CAS(2017078 ; 11673035 ; 11673035 ; 2014043) ; 2014043) ; 11673034 ; 11673034 ; 11773039) ; 11773039)
DOI10.3847/2041-8213/aa8edd
关键词[WOS]PLASMA EJECTIONS ; HIGH-RESOLUTION ; FIELDS ; BRIGHTENINGS ; TELESCOPE ; FEATURES ; UMBRA
收录类别SCI
语种英语
资助者National Natural Science Foundations of China(11533008 ; National Natural Science Foundations of China(11533008 ; Youth Innovation Promotion Association of CAS(2017078 ; Youth Innovation Promotion Association of CAS(2017078 ; 11673035 ; 11673035 ; 2014043) ; 2014043) ; 11673034 ; 11673034 ; 11773039) ; 11773039) ; National Natural Science Foundations of China(11533008 ; National Natural Science Foundations of China(11533008 ; Youth Innovation Promotion Association of CAS(2017078 ; Youth Innovation Promotion Association of CAS(2017078 ; 11673035 ; 11673035 ; 2014043) ; 2014043) ; 11673034 ; 11673034 ; 11773039) ; 11773039)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000412577000004
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/20103
专题太阳物理研究部
作者单位1.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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GB/T 7714
Hou, Yijun,Zhang, Jun,Li, Ting,et al. Simultaneous Observations of p-mode Light Walls and Magnetic Reconnection Ejections above Sunspot Light Bridges[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,848(1).
APA Hou, Yijun,Zhang, Jun,Li, Ting,Yang, Shuhong,&Li, Xiaohong.(2017).Simultaneous Observations of p-mode Light Walls and Magnetic Reconnection Ejections above Sunspot Light Bridges.ASTROPHYSICAL JOURNAL LETTERS,848(1).
MLA Hou, Yijun,et al."Simultaneous Observations of p-mode Light Walls and Magnetic Reconnection Ejections above Sunspot Light Bridges".ASTROPHYSICAL JOURNAL LETTERS 848.1(2017).
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