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SDO/AIA OBSERVATIONS OF LARGE-AMPLITUDE LONGITUDINAL OSCILLATIONS IN A SOLAR FILAMENT
Li, Ting; Zhang, Jun
2012-11-20
Source PublicationASTROPHYSICAL JOURNAL LETTERS
Volume760Issue:1
AbstractWe present the first Solar Dynamics Observatory/Atmospheric Imaging Assembly observations of the large-amplitude longitudinal (LAL) oscillations in the south and north parts (SP and NP) of a solar filament on 2012 April 7. Both oscillations are triggered by flare activities close to the filament. The period varies with filamentary threads, ranging from 44 to 67 minutes. The oscillations of different threads are out of phase, and their velocity amplitudes vary from 30 to 60 km s(-1), with a maximum displacement of about 25 Mm. The oscillations of the SP repeat for about four cycles without any significant damping and then a nearby C2.4 flare causes the transition from the LAL oscillations of the filament to its later eruption. The filament eruption is also associated with a coronal mass ejection and a B6.8 flare. However, the oscillations of the NP damp with time and die out at last. Our observations show that the activated part of the SP repeatedly shows a helical motion. This indicates that the magnetic structure of the filament is possibly modified during this process. We suggest that the restoring force is the coupling of the magnetic tension and gravity.
KeywordSun: Activity Sun: Coronal Mass Ejections (Cmes) Sun: Filaments Sun: Oscillations Prominences
DOI10.1088/2041-8205/760/1/L10
Indexed BySCI
Language英语
WOS IDWOS:000310839100010
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/6106
Collection太阳物理研究部
AffiliationChinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Li, Ting,Zhang, Jun. SDO/AIA OBSERVATIONS OF LARGE-AMPLITUDE LONGITUDINAL OSCILLATIONS IN A SOLAR FILAMENT[J]. ASTROPHYSICAL JOURNAL LETTERS,2012,760(1).
APA Li, Ting,&Zhang, Jun.(2012).SDO/AIA OBSERVATIONS OF LARGE-AMPLITUDE LONGITUDINAL OSCILLATIONS IN A SOLAR FILAMENT.ASTROPHYSICAL JOURNAL LETTERS,760(1).
MLA Li, Ting,et al."SDO/AIA OBSERVATIONS OF LARGE-AMPLITUDE LONGITUDINAL OSCILLATIONS IN A SOLAR FILAMENT".ASTROPHYSICAL JOURNAL LETTERS 760.1(2012).
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