Homologous Microflares with Mass Ejection and Plasma Heating on the Quiet Sun
文献类型：期刊论文
| 作者 | Jin,C. L.1; Zhou,G. P.1; Wang,J. X.1,2 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2021-06-01 |
| 卷号 | 914期号:2 |
| ISSN号 | 2041-8205 |
| 关键词 | Solar magnetic fields Solar activity Solar ultraviolet emission |
| DOI | 10.3847/2041-8213/ac097c |
| 英文摘要 | Abstract Study of microflares on the quiet Sun is extremely important in learning the physics of both solar flare and atmospheric heating. Here, for the first time, we report the detailed observations of two homologous microflares from Atmospheric Imager Assembly (AIA) images and Heliospheric Magnetic Imager magnetograms in a very quiet region. The two microflares are observed clearly in the extreme ultraviolet and faintly in the ultraviolet in AIA images. They have an area of ～59 Mm2 and ～46 Mm2, and a duration of 25 minutes and 22 minutes. The magnetic cancellation continuously takes place during the microflares, and the magnetic flux decrease is apparent, with a value of ～4 × 1018 Mx. The obvious mass ejections are observed during the microflares, and dimming occurs during and after the microflares. The velocity of mass ejection is up to 160 km s?1. For the two microflares, the time of peak intensity in λ 30.4 nm precedes that of the coronal peak emission, up to 2.4–3.3 minutes. Their thermal energy is estimated to be 1.3 × 1027 erg and 2.5 × 1026 erg, respectively, which heats the corona up to 5.8 MK and 2.8 MK. There are many similarities of microflares on the quiet Sun to major flares in the active regions. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:2041-8205-914-2-AC097C |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/57470]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Jin,C. L. |
| 作者单位 | 1.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Science, Beijing 100101, People's Republic of China; cljin@nao.cas.cn 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, 100049, Beijing, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Jin,C. L.,Zhou,G. P.,Wang,J. X.. Homologous Microflares with Mass Ejection and Plasma Heating on the Quiet Sun[J]. The Astrophysical Journal Letters,2021,914(2). |
| APA | Jin,C. L.,Zhou,G. P.,&Wang,J. X..(2021).Homologous Microflares with Mass Ejection and Plasma Heating on the Quiet Sun.The Astrophysical Journal Letters,914(2). |
| MLA | Jin,C. L.,et al."Homologous Microflares with Mass Ejection and Plasma Heating on the Quiet Sun".The Astrophysical Journal Letters 914.2(2021). |
入库方式： OAI收割
来源：国家天文台
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