Magnetic Flux of Active Regions Determining the Eruptive Character of Large Solar Flares
文献类型：期刊论文
| 作者 | Li,Ting2,3 ; Hou,Yijun2,3; Yang,Shuhong2,3; Zhang,Jun1,3; Liu,Lijuan5,6; Veronig,Astrid M.4
|
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-09-01 |
| 卷号 | 900期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | Solar flares Solar activity Solar coronal mass ejections Stellar flares Solar magnetic fields Stellar coronal mass ejections |
| DOI | 10.3847/1538-4357/aba6ef |
| 英文摘要 | Abstract We establish the largest eruptive/confined flare database to date and analyze 322 flares of Geostationary Operational Environmental Satellite class M1.0 and larger that occurred during 2010–2019, i.e., almost spanning all of solar cycle 24. We find that the total unsigned magnetic flux ( ) of active regions (ARs) is a key parameter governing the eruptive character of large flares, with the proportion of eruptive flares exhibiting a strong anticorrelation with . This means that an AR containing a large magnetic flux has a lower probability that the large flares it produces will be associated with a coronal mass ejection (CME). This finding is supported by the high positive correlation we obtained between the critical decay index height and , implying that ARs with a larger have a stronger magnetic confinement. Moreover, the confined flares originating from ARs larger than Mx have several characteristics in common: stable filament, slipping magnetic reconnection, and strongly sheared post-flare loops. Our findings reveal new relations between the magnetic flux of ARs and the occurrence of CMEs in association with large flares. The relations obtained here provide quantitative criteria for forecasting CMEs and adverse space weather, and have important implications for “superflares” on solar-type stars and stellar CMEs. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-900-2-ABA6EF |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/61841]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.School of Physics and Materials Science, Anhui University, Hefei 230601, People’s Republic of China 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 3.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China; liting@nao.cas.cn 4.Institute of Physics & Kanzelh?he Observatory for Solar and Environmental Research, University of Graz, A-8010 Graz, Austria 5.CAS Center for Excellence in Comparative Planetology, People’s Republic of China 6.School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, Guangdong, 519082, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Li,Ting,Hou,Yijun,Yang,Shuhong,et al. Magnetic Flux of Active Regions Determining the Eruptive Character of Large Solar Flares[J]. The Astrophysical Journal,2020,900(2). |
| APA | Li,Ting,Hou,Yijun,Yang,Shuhong,Zhang,Jun,Liu,Lijuan,&Veronig,Astrid M..(2020).Magnetic Flux of Active Regions Determining the Eruptive Character of Large Solar Flares.The Astrophysical Journal,900(2). |
| MLA | Li,Ting,et al."Magnetic Flux of Active Regions Determining the Eruptive Character of Large Solar Flares".The Astrophysical Journal 900.2(2020). |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。