YNAO OpenIR  > 选址与日冕观测组
IMAGING OBSERVATIONS OF QUASI-PERIODIC PULSATIONS IN SOLAR FLARE LOOPS WITH SDO/AIA
Su, JT1; Shen YD(申远灯)2; Liu Y(刘煜)2; Liu, Y3; Mao, XJ1,4; Su, JT (reprint author), Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China.
Source PublicationASTROPHYSICAL JOURNAL
2012-08-20
Volume755Issue:2
DOI10.1088/0004-637X/755/2/113
Contribution Rank第2完成单位
Indexed BySCI
KeywordSun: Activity Sun: Corona Sun: Flares Sun: Oscillations
AbstractQuasi-periodic pulsations (QPPs) of flaring emission with periods from a few seconds to tens of minutes have been widely detected from radio bands to gamma-ray emissions. However, in the past the spatial information of pulsations could not be utilized well due to the instrument limits. We report here imaging observations of the QPPs in three loop sections during a C1.7 flare with periods of P = 24 s-3 minutes by means of the extreme-ultraviolet 171 angstrom channel of the Atmospheric Imaging Assembly (AIA) instrument on board the Solar Dynamics Observatory. We confirm that the QPPs with the shortest period of 24 s were not of an artifact produced by the Nyquist frequency of the AIA 12 s cadence. The QPPs in the three loop sections were interconnected and closely associated with the flare. The detected perturbations propagated along the loops at speeds of 65-200 km s(-1), close to those of acoustic waves in them. The loops were made up of many bright blobs arranged in alternating bright and dark changes in intensity (spatial periodical distribution) with the wavelengths 2.4-5 Mm (as if they were magnetohydrodynamic waves). Furthermore, in the time-distance diagrams, the detected perturbation wavelengths of the QPPs are estimated to be similar to 10 Mm, which evidently do not fit the above ones of the spatial periodic distributions and produce a difference of a factor of 2-4 with them. It is suggested that the short QPPs with periods P < 60 s were possibly sausagemode oscillations and the long QPPs with periods P > 60 s were the higher (e. g., > 2nd) harmonics of slow magnetoacoustic waves.
Funding OrganizationAJFC [10878016, 11073050] ; National Astronomical Observatories, Chinese Academy of Sciences (CAS) ; Key Laboratory of Solar Activity of CAS ; National Basic Research Program of China [2011CB8114001]
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-637X
URL查看原文
WOS IDWOS:000307791400030
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS Keyword2011 FEBRUARY 15 ; X-RAY FLARE ; CORONAL LOOPS ; MAGNETOHYDRODYNAMIC OSCILLATIONS ; PROPAGATING WAVES ; RADIO PULSATIONS ; MAGNETIC-FIELD ; X2.2 FLARE ; EMISSION ; EVENT
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/7179
Collection选址与日冕观测组
Corresponding AuthorSu, JT (reprint author), Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China.
Affiliation1.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Science, Beijing 100012, China
2.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
3.W. W. Hansen Experimental Physical Laboratory, Stanford University, Stanford, CA 94305, USA
4.Department of Astronomy, Beijing Normal University, Beijing 100875, China
Recommended Citation
GB/T 7714
Su, JT,Shen YD,Liu Y,et al. IMAGING OBSERVATIONS OF QUASI-PERIODIC PULSATIONS IN SOLAR FLARE LOOPS WITH SDO/AIA[J]. ASTROPHYSICAL JOURNAL,2012,755(2).
APA Su, JT,Shen YD,Liu Y,Liu, Y,Mao, XJ,&Su, JT .(2012).IMAGING OBSERVATIONS OF QUASI-PERIODIC PULSATIONS IN SOLAR FLARE LOOPS WITH SDO/AIA.ASTROPHYSICAL JOURNAL,755(2).
MLA Su, JT,et al."IMAGING OBSERVATIONS OF QUASI-PERIODIC PULSATIONS IN SOLAR FLARE LOOPS WITH SDO/AIA".ASTROPHYSICAL JOURNAL 755.2(2012).
Files in This Item:
File Name/Size DocType Version Access License
IMAGING OBSERVATIONS(2956KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Su, JT]'s Articles
[Shen YD(申远灯)]'s Articles
[Liu Y(刘煜)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Su, JT]'s Articles
[Shen YD(申远灯)]'s Articles
[Liu Y(刘煜)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Su, JT]'s Articles
[Shen YD(申远灯)]'s Articles
[Liu Y(刘煜)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: IMAGING OBSERVATIONS OF QUASI-PERIODIC PULSATIONS IN SOLAR FLARE LOOPS WITH SDO_AIA.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.