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Simultaneous Observations of p-mode Light Walls and Magnetic Reconnection Ejections above Sunspot Light Bridges

文献类型：期刊论文

作者Hou, Yijun1,2; Li, Xiaohong1,2; Li, Ting1,2; Yang, Shuhong1,2; Zhang, Jun1,2; Yang,Shuhong; Zhang,Jun; Li,Ting
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2017-10-10
卷号848期号:1
关键词Sun: Activity Sun: Atmosphere Sun: Oscillations Sun: Uv Radiation Sunspots Supporting Material: Animations
DOI10.3847/2041-8213/aa8edd
文献子类Article
英文摘要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.
WOS关键词PLASMA EJECTIONS ; HIGH-RESOLUTION ; FIELDS ; BRIGHTENINGS ; TELESCOPE ; FEATURES ; UMBRA
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000412577000004
资助机构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)
源URL[http://ir.bao.ac.cn/handle/114a11/20103]  
专题国家天文台_太阳物理研究部
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式
GB/T 7714		 Hou, Yijun,Li, Xiaohong,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.,Li, Xiaohong.,Li, Ting.,Yang, Shuhong.,Zhang, Jun.,...&Li,Ting.(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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