KMS National Astronomical Observatories, CAS
| SDO/AIA OBSERVATIONS OF LARGE-AMPLITUDE LONGITUDINAL OSCILLATIONS IN A SOLAR FILAMENT | |
Li, Ting ; Zhang, Jun
| |
| 2012-11-20 | |
| Source Publication | ASTROPHYSICAL JOURNAL LETTERS
 |
| Volume | 760Issue:1 |
| Abstract | We 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. |
| Keyword | Sun: Activity Sun: Coronal Mass Ejections (Cmes) Sun: Filaments Sun: Oscillations Prominences |
| DOI | 10.1088/2041-8205/760/1/L10 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000310839100010 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.bao.ac.cn/handle/114a11/6106 |
| Collection | 太阳部 |
| Affiliation | Chinese 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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