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Fundamental and Harmonic Oscillations in Neighboring Coronal Loops
Li HB(李洪波)1,2,3; Liu Y(刘煜)1,2; Tam, Kuan Vai4
Source PublicationASTROPHYSICAL JOURNAL
2017-06-20
Volume842Issue:2
DOI10.3847/1538-4357/aa7677
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: Activity Sun: Corona Sun: Oscillations
Abstract

We present observations of multimode (fundamental and harmonic) oscillations in a loop system, which appear to be simultaneously excited by a GOES C-class flare. Analysis of the periodic oscillations reveals that (1) the primary loop with a period of P-a approximate to 4 minutes and a secondary loop with two periods of Pa approximate to 4 minutes and Pb approximate to 2 minutes are detected simultaneously in closely spaced loop strands; (2) both oscillation components have their peak amplitudes near the loop apex, while in the second loop the low-frequency component Pa dominates in a loop segment that is two times larger than the high-frequency component Pb; (3) the harmonic mode Pb shows the largest deviation from a sinusoidal loop shape at the loop apex. We conclude that multiple harmonic modes with different displacement profiles can be excited simultaneously even in closely spaced strands, similar to the overtones of a violin string.

Funding ProjectNational Scientific Foundation of China[NSFC 11533009] ; Key Laboratory of Geospace Environment, CAS, University of Science & Technology of China ; Macao Science and Technology Development Fund[FDCT-16-003-SSI]
Funding OrganizationNational Scientific Foundation of China[NSFC 11533009] ; Key Laboratory of Geospace Environment, CAS, University of Science & Technology of China ; Macao Science and Technology Development Fund[FDCT-16-003-SSI]
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
ISSN0004-637X
URL查看原文
WOS IDWOS:000403775600001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordDYNAMICS-OBSERVATORY SDO ; TRANSVERSE OSCILLATIONS ; PROMINENCE ; SEISMOLOGY ; FIBRILS ; SDO/AIA ; SYSTEM ; ARCADE ; MODES ; FLARE
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/10142
Collection选址与日冕观测组
Corresponding AuthorLi HB(李洪波)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science & Technology of China, Hefei 230026, China
3.University of Chinese Academy of Sciences, Beijing 100049, China
4.Space Science Institute, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li HB,Liu Y,Tam, Kuan Vai. Fundamental and Harmonic Oscillations in Neighboring Coronal Loops[J]. ASTROPHYSICAL JOURNAL,2017,842(2).
APA Li HB,Liu Y,&Tam, Kuan Vai.(2017).Fundamental and Harmonic Oscillations in Neighboring Coronal Loops.ASTROPHYSICAL JOURNAL,842(2).
MLA Li HB,et al."Fundamental and Harmonic Oscillations in Neighboring Coronal Loops".ASTROPHYSICAL JOURNAL 842.2(2017).
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