On-disk Solar Coronal Condensations Facilitated by Magnetic Reconnection between Open and Closed Magnetic Structures
文献类型：期刊论文
| 作者 | Li,Leping2,3 ; Peter,Hardi1; Chitta,Lakshmi Pradeep1; Song,Hongqiang4
|
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2021-03-30 |
| 卷号 | 910期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | Solar magnetic reconnection Plasma physics Solar corona Solar ultraviolet emission Solar magnetic fields |
| DOI | 10.3847/1538-4357/abe537 |
| 英文摘要 | Abstract Coronal condensation and rain are a crucial part of the mass cycle between the corona and chromosphere. In some cases, condensation and subsequent rain originate in the magnetic dips formed during magnetic reconnection. This provides a new and alternative formation mechanism for coronal rain. Until now, only off-limb, rather than on-disk, condensation events during reconnection have been reported. In this paper, employing extreme-ultraviolet (EUV) images of the Solar Terrestrial Relations Observatory (STEREO) and Solar Dynamics Observatory (SDO), we investigate the condensations facilitated by reconnection from 2011 July 14–15, when STEREO was in quadrature with respect to the Sun–Earth line. Above the limb, in STEREO/EUV Imager (EUVI) 171 ? images, higher-lying open structures move downward, reconnect with the lower-lying closed loops, and form dips. Two sets of newly reconnected structures then form. In the dips, bright condensations occur in the EUVI 304 ? images repeatedly, which then flow downward to the surface. In the on-disk observations by SDO/Atmospheric Imaging Assembly (AIA) in the 171 ? channel, these magnetic structures are difficult to identify. Dark condensations appear in the AIA 304 ? images, and then move to the surface as on-disk coronal rain. The cooling and condensation of coronal plasma is revealed by the EUV light curves. If only the on-disk observations were be available, the relation between the condensations and reconnection, shown clearly by the off-limb observations, could not be identified. Thus, we suggest that some on-disk condensation events seen in transition region and chromospheric lines may be facilitated by reconnection. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-910-2-ABE537 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/60042]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Li,Leping |
| 作者单位 | 1.Max Planck Institute for Solar System Research, D-37077 G?ttingen, Germany 2.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 Chinalepingli@nao.cas.cn 4.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, and Institute of Space Sciences, Shandong University, Weihai, Shandong 264209, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Li,Leping,Peter,Hardi,Chitta,Lakshmi Pradeep,et al. On-disk Solar Coronal Condensations Facilitated by Magnetic Reconnection between Open and Closed Magnetic Structures[J]. The Astrophysical Journal,2021,910(2). |
| APA | Li,Leping,Peter,Hardi,Chitta,Lakshmi Pradeep,&Song,Hongqiang.(2021).On-disk Solar Coronal Condensations Facilitated by Magnetic Reconnection between Open and Closed Magnetic Structures.The Astrophysical Journal,910(2). |
| MLA | Li,Leping,et al."On-disk Solar Coronal Condensations Facilitated by Magnetic Reconnection between Open and Closed Magnetic Structures".The Astrophysical Journal 910.2(2021). |
入库方式： OAI收割
来源：国家天文台
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