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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
Source PublicationASTROPHYSICAL JOURNAL LETTERS
Volume848Issue:1
AbstractRecent 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.
SubtypeArticle
KeywordSun: Activity Sun: Atmosphere Sun: Oscillations Sun: Uv Radiation Sunspots Supporting Material: Animations
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNational 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
WOS KeywordPLASMA EJECTIONS ; HIGH-RESOLUTION ; FIELDS ; BRIGHTENINGS ; TELESCOPE ; FEATURES ; UMBRA
Indexed BySCI
Language英语
Funding OrganizationNational 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 Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000412577000004
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/20103
Collection太阳物理研究部
Affiliation1.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
Recommended Citation
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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