QUASI-PERIODIC PULSATIONS WITH VARYING PERIOD IN MULTI-WAVELENGTH OBSERVATIONS OF AN X-CLASS FLARE
文献类型：期刊论文
| 作者 | Huang, Jing1 ; Tan, Baolin1; Zhang, Yin1; Karlicky, Marian2; Meszarosova, Hana2
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2014-08-10 |
| 卷号 | 791期号:1 |
| 关键词 | Sun: flares Sun: oscillations Sun: radio radiation Sun: UV radiation |
| 英文摘要 | This work presents an interesting phenomenon of the period variation in quasi-periodic pulsations (QPPs) observed during the impulsive phase of a coronal mass ejection-related X1.1 class flare on 2012 July 6. The period of QPPs was changed from 21 s at soft X-rays (SXR) to 22-23 s at microwaves, to similar to 24 s at extreme ultraviolet emissions (EUV), and to 27-32 s at metric-decimetric waves. The microwave, EUV, and SXR QPPs, emitted from flare loops of different heights, were oscillating in phase. Fast kink mode oscillations were proposed to be the modulation mechanism, which may exist in a wide region in the solar atmosphere from the chromosphere to the upper corona or even to the interplanetary space. Changed parameters of flare loops through the solar atmosphere could result in the varying period of QPPs at different wavelengths. The first appearing microwave QPPs and quasi-periodic metric-decimetric type III bursts were generated by energetic electrons. This may imply that particle acceleration or magnetic reconnection were located between these two non-thermal emission sources. Thermal QPPs (in SXR and EUV emissions) occurred later than the nonthermal ones, which would suggest a some time for plasma heating or energy dissipation in flare loops during burst processes. At the beginning of flare, a sudden collapse and expansion of two separated flare loop structures occurred simultaneously with the multi-wavelength QPPs. An implosion in the corona, including both collapse and expansion of flare loops, could be a trigger of loop oscillations in a very large region in the solar atmosphere. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000339657700044 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6541]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Activ, Beijing 100012, Peoples R China 2.Acad Sci Czech Republic, Astron Inst, CZ-25165 Ondrejov, Czech Republic |
| 推荐引用方式 GB/T 7714 | Huang, Jing,Tan, Baolin,Zhang, Yin,et al. QUASI-PERIODIC PULSATIONS WITH VARYING PERIOD IN MULTI-WAVELENGTH OBSERVATIONS OF AN X-CLASS FLARE[J]. ASTROPHYSICAL JOURNAL,2014,791(1). |
| APA | Huang, Jing,Tan, Baolin,Zhang, Yin,Karlicky, Marian,&Meszarosova, Hana.(2014).QUASI-PERIODIC PULSATIONS WITH VARYING PERIOD IN MULTI-WAVELENGTH OBSERVATIONS OF AN X-CLASS FLARE.ASTROPHYSICAL JOURNAL,791(1). |
| MLA | Huang, Jing,et al."QUASI-PERIODIC PULSATIONS WITH VARYING PERIOD IN MULTI-WAVELENGTH OBSERVATIONS OF AN X-CLASS FLARE".ASTROPHYSICAL JOURNAL 791.1(2014). |
入库方式： OAI收割
来源：国家天文台
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