Signatures of Magnetic Reconnection at the Footpoints of Fan-shaped Jets on a Light Bridge Driven by Photospheric Convective Motions

doi:10.3847/1538-4357/aaf1d1

CORC > 国家天文台 > 中国科学院国家天文台

	Signatures of Magnetic Reconnection at the Footpoints of Fan-shaped Jets on a Light Bridge Driven by Photospheric Convective Motions
	Bai, Xianyong 2,3; Socas-Navarro, Hector 4,5; Nobrega-Siverio, Daniel 6,7; Su, Jiangtao 2,3; Deng, Yuanyong 2,3; Li, Dong 8,9; Cao, Wenda 1; Ji, Kaifan 10
刊名	ASTROPHYSICAL JOURNAL
	2019-01-10
卷号	870 期号:2 页码:12
关键词	methods: observational Sun: activity Sun: atmosphere Sun: magnetic fields sunspots
ISSN号	0004-637X
DOI	10.3847/1538-4357/aaf1d1
英文摘要	Dynamical jets are generally found on light bridges (LBs), which are key to studying sunspot decay. So far, their formation mechanism is not fully understood. In this paper, we used state-of-the-art observations from the Goode Solar Telescope, the Interface Region Imaging Spectrograph, the Spectro-polarimeter on board Hinode, and the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory to analyze the fan-shaped jets on LBs in detail. A continuous upward motion of the jets in the ascending phase is found from the H alpha velocity that lasts for 12 minutes and is associated with the H alpha line wing enhancements. Two mini jets appear on the bright fronts of the fan-shaped jets visible in the AIA 171 and 193 angstrom channels, with a time interval as short as 1 minute. Two kinds of small-scale convective motions are identified in the photospheric images, along with the H alpha line wing enhancements. One seems to be associated with the formation of a new convection cell, and the other manifests as the motion of a dark lane passing through the convection cell. The finding of three-lobe Stokes V profiles and their inversion with the NICOLE code indicate that there are magnetic field lines with opposite polarities in LBs. From the H alpha - 0.8 angstrom images, we found ribbon-like brightenings propagating along the LBs, possibly indicating slipping reconnection. Our observation supports the idea that the fan-shaped jets under study are caused by magnetic reconnection, and photospheric convective motions play an important role in triggering the magnetic reconnection.
资助项目	NJIT ; NSF[AGS-1821294] ; Korea Astronomy and Space Science Institute ; Seoul National University ; strategic priority research program of the Chinese Academy of Science (CAS)[XDB09000000] ; ESA ; Norwegian Space Centre ; U.S. NSF[AGS-1821294] ; Young Researcher Grant from the National Astronomical Observatories, Chinese Academy of Sciences ; Research Council of Norway through its Centres of Excellence scheme[262622] ; [11873062] ; [11427901] ; [11427803] ; [11773072] ; [11773038] ; [11773040] ; [11703042] ; [U1731241] ; [11573012] ; [11673038] ; [XDA15010800] ; [XDB09040200]
WOS关键词	HIGH-RESOLUTION ; SI IV ; FIELDS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000455820100036
资助机构	NJIT ; NJIT ; NSF ; NSF ; Korea Astronomy and Space Science Institute ; Korea Astronomy and Space Science Institute ; Seoul National University ; Seoul National University ; strategic priority research program of the Chinese Academy of Science (CAS) ; strategic priority research program of the Chinese Academy of Science (CAS) ; ESA ; ESA ; Norwegian Space Centre ; Norwegian Space Centre ; U.S. NSF ; U.S. NSF ; Young Researcher Grant from the National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant from the National Astronomical Observatories, Chinese Academy of Sciences ; Research Council of Norway through its Centres of Excellence scheme ; Research Council of Norway through its Centres of Excellence scheme ; NJIT ; NJIT ; NSF ; NSF ; Korea Astronomy and Space Science Institute ; Korea Astronomy and Space Science Institute ; Seoul National University ; Seoul National University ; strategic priority research program of the Chinese Academy of Science (CAS) ; strategic priority research program of the Chinese Academy of Science (CAS) ; ESA ; ESA ; Norwegian Space Centre ; Norwegian Space Centre ; U.S. NSF ; U.S. NSF ; Young Researcher Grant from the National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant from the National Astronomical Observatories, Chinese Academy of Sciences ; Research Council of Norway through its Centres of Excellence scheme ; Research Council of Norway through its Centres of Excellence scheme ; NJIT ; NJIT ; NSF ; NSF ; Korea Astronomy and Space Science Institute ; Korea Astronomy and Space Science Institute ; Seoul National University ; Seoul National University ; strategic priority research program of the Chinese Academy of Science (CAS) ; strategic priority research program of the Chinese Academy of Science (CAS) ; ESA ; ESA ; Norwegian Space Centre ; Norwegian Space Centre ; U.S. NSF ; U.S. NSF ; Young Researcher Grant from the National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant from the National Astronomical Observatories, Chinese Academy of Sciences ; Research Council of Norway through its Centres of Excellence scheme ; Research Council of Norway through its Centres of Excellence scheme ; NJIT ; NJIT ; NSF ; NSF ; Korea Astronomy and Space Science Institute ; Korea Astronomy and Space Science Institute ; Seoul National University ; Seoul National University ; strategic priority research program of the Chinese Academy of Science (CAS) ; strategic priority research program of the Chinese Academy of Science (CAS) ; ESA ; ESA ; Norwegian Space Centre ; Norwegian Space Centre ; U.S. NSF ; U.S. NSF ; Young Researcher Grant from the National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant from the National Astronomical Observatories, Chinese Academy of Sciences ; Research Council of Norway through its Centres of Excellence scheme ; Research Council of Norway through its Centres of Excellence scheme
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/24706]
专题	中国科学院国家天文台
通讯作者	Bai, Xianyong
作者单位	1.New Jersey Inst Technol, Big Bear Solar Observ, Big Bear City, CA 92314 USA 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, 20 Datun Rd, Beijing 100012, Peoples R China 3.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 4.Inst Astrofis Canarias, Via Lactea S-N, San Cristobal la Laguna, Tenerife, Spain 5.Univ La Laguna, Dept Astrophys, E-38200 San Cristobal la Laguna, Tenerife, Spain 6.Univ Oslo, Inst Theoret Astrophys, POB 1029, NO-0315 Oslo, Norway 7.Univ Oslo, Rosseland Ctr Solar Phys, POB 1029, NO-0315 Oslo, Norway 8.Chinese Acad Sci, Purple Mt Observ, 8 Yuanhua Rd, Nanjing 210034, Jiangsu, Peoples R China 9.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210034, Jiangsu, Peoples R China 10.Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Bai, Xianyong,Socas-Navarro, Hector,Nobrega-Siverio, Daniel,et al. Signatures of Magnetic Reconnection at the Footpoints of Fan-shaped Jets on a Light Bridge Driven by Photospheric Convective Motions[J]. ASTROPHYSICAL JOURNAL,2019,870(2):12.
APA	Bai, Xianyong.,Socas-Navarro, Hector.,Nobrega-Siverio, Daniel.,Su, Jiangtao.,Deng, Yuanyong.,...&Ji, Kaifan.(2019).Signatures of Magnetic Reconnection at the Footpoints of Fan-shaped Jets on a Light Bridge Driven by Photospheric Convective Motions.ASTROPHYSICAL JOURNAL,870(2),12.
MLA	Bai, Xianyong,et al."Signatures of Magnetic Reconnection at the Footpoints of Fan-shaped Jets on a Light Bridge Driven by Photospheric Convective Motions".ASTROPHYSICAL JOURNAL 870.2(2019):12.