YNAO OpenIR  > 光纤阵列太阳光学望远镜研究组
Magnetic Connectivity between the Light Bridge and Penumbra in a Sunspot
Feng, Song1,2; Miao, Yuhu3; Yuan, Ding3; Qu ZQ(屈中权)2; Nakariakov, Valery M.4,5
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2020-04-10
Volume893Issue:1Pages:6
DOI10.3847/2041-8213/ab7dc4
Contribution Rank第2完成单位
Indexed BySCI
KeywordSunspots Magnetohydrodynamics sunspot flow Solar coronal waves Solar magnetic fields Solar magnetic reconnection
Abstract

A light bridge is a prominent structure commonly observed within a sunspot. Its presence usually triggers a wealth of dynamics in a sunspot and has a lasting impact on sunspot evolution. However, the fundamental structure of light bridges is still not well understood. In this study, we used the high-resolution spectropolarimetry data obtained by the Solar Optical Telescope on board the Hinode satellite to analyze the magnetic and thermal structure of a light bridge at AR 12838. We also combined the high-cadence 1700 angstrom channel data provided by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory to study the dynamics on this bridge. We found a pair of blue and red Doppler shift patches at two ends of this bridge; this pattern appears to be the convective motion directed by the horizontal component of the magnetic field aligned with the spine of the bridge. Paired upward and downward motions imply that the light bridge could have a two-legged or undulating magnetic field. Significant 4 minute oscillations in the emission intensity of the 1700 angstrom bandpass were detected at two ends, which overlapped the paired blue- and redshift patches. The oscillatory signals at the light bridge and the penumbra were highly correlated with each other. Although they are separated in space at the photosphere, the periodicity seems to have a common origin from underneath the sunspot. Therefore, we infer that the light bridge and penumbra could share a common magnetic source and become fragmented at the photosphere by magnetoconvection.

Funding ProjectNational Natural Science Foundation of China (NSFC)[11803005] ; National Natural Science Foundation of China (NSFC)[11911530690] ; Shenzhen Technology Project[JCYJ20180306172239618] ; NSFC[U1931107] ; Key Applied Basic Research program of the Yunnan Province[2018FA035]
Funding OrganizationNational Natural Science Foundation of China (NSFC)[11803005, 11911530690] ; Shenzhen Technology Project[JCYJ20180306172239618] ; NSFC[U1931107] ; Key Applied Basic Research program of the Yunnan Province[2018FA035]
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN2041-8205
URL查看原文
WOS IDWOS:000526698900001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/23033
Collection光纤阵列太阳光学望远镜研究组
Corresponding AuthorYuan, Ding
Affiliation1.Yunnan Key Laboratory of Computer Technology Application, Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, People's Republic of China
2.Yunnan Astronomical Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, People's Republic of China
3.Institute of Space Science and Applied Technology, Harbin Institute of Technology, Shenzhen, Guangdong 518055, People's Republic of China
4.Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, CV4 7AL, UK
5.St. Petersburg Branch, Special Astrophysical Observatory, Russian Academy of Sciences, St. Petersburg, 196140, Russia
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Feng, Song,Miao, Yuhu,Yuan, Ding,et al. Magnetic Connectivity between the Light Bridge and Penumbra in a Sunspot[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,893(1):6.
APA Feng, Song,Miao, Yuhu,Yuan, Ding,Qu ZQ,&Nakariakov, Valery M..(2020).Magnetic Connectivity between the Light Bridge and Penumbra in a Sunspot.ASTROPHYSICAL JOURNAL LETTERS,893(1),6.
MLA Feng, Song,et al."Magnetic Connectivity between the Light Bridge and Penumbra in a Sunspot".ASTROPHYSICAL JOURNAL LETTERS 893.1(2020):6.
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