Large-amplitude Longitudinal Oscillations Triggered by the Merging of Two Solar Filaments: Observations and Magnetic Field Analysis
文献类型：期刊论文
| 作者 | Luna, M.1,2; Su, Y.3,4 ; Schmieder, B.5; Chandra, R.5,6; Kucera, T. A.7
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2017-12-01 |
| 卷号 | 850期号:2页码:13 |
| 关键词 | Sun: filaments, prominences Sun: magnetic fields Sun: oscillations |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aa9713 |
| 通讯作者 | Luna, M.() |
| 英文摘要 | We follow the eruption of two related intermediate filaments observed in Ha (from GONG) and EUV (from Solar Dynamics Observatory SDO/Atmospheric Imaging assembly AIA) and the resulting large-amplitude longitudinal oscillations of the plasma in the filament channels. The events occurred in and around the decayed active region AR12486 on 2016 January 26. Our detailed study of the oscillation reveals that the periods of the oscillations are about one hour. In H alpha, the period decreases with time and exhibits strong damping. The analysis of 171 angstrom images shows that the oscillation has two phases: an initial long-period phase and a subsequent oscillation with a shorter period. In this wavelength, the damping appears weaker than in Ha. The velocity is the largest ever detected in a prominence oscillation, approximately 100 km s(-1). Using SDO/HMI magnetograms, we reconstruct the magnetic field of the filaments, modeled as flux ropes by using a flux-rope insertion method. Applying seismological techniques, we determine that the radii of curvature of the field lines in which cool plasma is condensed are in the range 75-120. Mm, in agreement with the reconstructed field. In addition, we infer a field strength of >= 7 to 30 Gauss, depending on the electron density assumed, that is also in agreement with the values from the reconstruction (8-20 Gauss). The poloidal flux is zero and the axis flux is on the order of 10(20) to 10(21) Mx, confirming the high shear existing even in a non-active filament. |
| WOS关键词 | QUIESCENT PROMINENCE DYNAMICS ; PERIODIC MOTION ; MORETON WAVE ; POLAR CROWN ; HINODE ; FLOWS ; TRACE ; EUV ; SUN ; SDO |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000425485500002 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/22289]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Luna, M. |
| 作者单位 | 1.Inst Astrofis Canarias, E-38200 Tenerife, Spain 2.Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain 3.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Sci, Nanjing 210008, Jiangsu, Peoples R China 4.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China 5.CNRS, UMR8109, LESIA, Observ Paris, F-92195 Meudon, France 6.Kumaun Univ, Dept Phys, DSB Campus, Naini Tal, India 7.NASA, Goddard Space Flight Ctr, Code 671, Greenbelt, MD 20771 USA |
| 推荐引用方式 GB/T 7714 | Luna, M.,Su, Y.,Schmieder, B.,et al. Large-amplitude Longitudinal Oscillations Triggered by the Merging of Two Solar Filaments: Observations and Magnetic Field Analysis[J]. ASTROPHYSICAL JOURNAL,2017,850(2):13. |
| APA | Luna, M.,Su, Y.,Schmieder, B.,Chandra, R.,&Kucera, T. A..(2017).Large-amplitude Longitudinal Oscillations Triggered by the Merging of Two Solar Filaments: Observations and Magnetic Field Analysis.ASTROPHYSICAL JOURNAL,850(2),13. |
| MLA | Luna, M.,et al."Large-amplitude Longitudinal Oscillations Triggered by the Merging of Two Solar Filaments: Observations and Magnetic Field Analysis".ASTROPHYSICAL JOURNAL 850.2(2017):13. |
入库方式： OAI收割
来源：紫金山天文台
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