EFFECT OF A SAUSAGE OSCILLATION ON RADIO ZEBRA-PATTERN STRUCTURES IN A SOLAR FLARE
文献类型：期刊论文
| 作者 | Yu, Sijie1 ; Nakariakov, V. M.2,3,4; Yan, Yihua1
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2016-07-20 |
| 卷号 | 826期号:1 |
| 关键词 | Sun: flares Sun: oscillations Sun: radio radiation |
| 英文摘要 | Sausage modes that are axisymmetric fast magnetoacoustic oscillations of solar coronal loops are characterized by variation of the plasma density and magnetic field, and hence cause time variations of the electron plasma frequency and cyclotron frequency. The latter parameters determine the condition for the double plasma resonance (DPR), which is responsible for the appearance of zebra-pattern (ZP) structures in time spectra of solar type IV radio bursts. We perform numerical simulations of standing and propagating sausage oscillations in a coronal loop modeled as a straight, field-aligned plasma slab, and determine the time variation of the DPR layer locations. Instant values of the plasma density and magnetic field at the DPR layers allowed us to construct skeletons of the time variation of ZP stripes in radio spectra. In the presence of a sausage oscillation, the ZP structures are shown to have characteristic wiggles with the time period prescribed by the sausage oscillation. Standing and propagating sausage oscillations are found to have different signatures in ZP patterns. We conclude that ZP wiggles can be used for the detection of short-period sausage oscillations and the exploitation of their seismological potential. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000381962200078 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5282]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Warwick, Dept Phys, Ctr Fus Space & Astrophys, Coventry CV4 7AL, W Midlands, England 3.Kyung Hee Univ, Sch Space Res, Yongin 446701, Gyeonggi, South Korea 4.RAS, Cent Astron Observ Pulkovo, St Petersburg 196140, Russia |
| 推荐引用方式 GB/T 7714 | Yu, Sijie,Nakariakov, V. M.,Yan, Yihua. EFFECT OF A SAUSAGE OSCILLATION ON RADIO ZEBRA-PATTERN STRUCTURES IN A SOLAR FLARE[J]. ASTROPHYSICAL JOURNAL,2016,826(1). |
| APA | Yu, Sijie,Nakariakov, V. M.,&Yan, Yihua.(2016).EFFECT OF A SAUSAGE OSCILLATION ON RADIO ZEBRA-PATTERN STRUCTURES IN A SOLAR FLARE.ASTROPHYSICAL JOURNAL,826(1). |
| MLA | Yu, Sijie,et al."EFFECT OF A SAUSAGE OSCILLATION ON RADIO ZEBRA-PATTERN STRUCTURES IN A SOLAR FLARE".ASTROPHYSICAL JOURNAL 826.1(2016). |
入库方式： OAI收割
来源：国家天文台
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