Long-standing Small-scale Reconnection Processes at Saturn Revealed by Cassini
文献类型：期刊论文
| 作者 | Guo,R. L.12,13; Yao,Z. H.11; Sergis,N.9,10; Wei,Y.8,13; Xu,X. J.12; Coates,A. J.7; Delamere,P. A.6; Roussos,E.5; Arridge,C. S.4; Waite,J. H.3 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2019-10-07 |
| 卷号 | 884期号:1 |
| 关键词 | Solar magnetic reconnection Planetary magnetosphere Interplanetary particle acceleration |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/ab4429 |
| 英文摘要 | Abstract The internal mass source from the icy moon Enceladus in Saturn’s rapidly rotating magnetosphere drives electromagnetic dynamics in multiple spatial and temporal scales. The distribution and circulation of the internal plasma and associated energy are thus crucial in understanding Saturn’s magnetospheric environment. Magnetic reconnection is one of the key processes in driving plasma and energy transport in the magnetosphere, and also a fundamental plasma process in energizing charged particles. Recent works suggested that reconnection driven by Saturn’s rapid rotation might appear as a chain of microscale structures, named drizzle-like reconnection. The drizzle-like reconnection could exist not only in the nightside magnetodisk, but also in the dayside magnetodisk. Here, using in situ measurements from the Cassini spacecraft, we report multiple reconnection sites that were successively detected during a time interval longer than one rotation period. The time separation between two adjacently detected reconnection sites can be much less than one rotation period, implying that the reconnection processes are likely small-scale, or frequently repetitive. The spatial distribution of the identified long-standing multiple small reconnection site sequences shows no significant preference on local times. We propose that the small reconnection sites discussed in this Letter are rotationally driven and rotate with the magnetosphere. Since the reconnection process on Saturn can be long-durational, the rotational regime can cause these small-scale reconnection sites to spread to all local times, resulting in global release of energy and mass from the magnetosphere. |
| 语种 | 英语 |
| WOS记录号 | IOP:2041-8205-884-1-AB4429 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/93872]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 作者单位 | 1.Faculty of Natural Sciences, Department of Physics, Imperial College, London, UK 2.Applied Physics Laboratory, Johns Hopkins University, Laurel, MD, USA 3.Southwest Research Institute, San Antonio, TX, USA 4.Department of Physics, Lancaster University, Bailrigg, Lancaster LA1 4YB, UK 5.Max-Planck-Institut für Sonnensystemforschung, G?ttingen, Germany 6.University of Alaska Fairbanks, Geophysical Institute, 903 Koyokuk Drive, Fairbanks, AK 99775-7320, USA 7.UCL Mullard Space Science Laboratory, Dorking, RH5 6NT, UK 8.College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, People’s Republic of China 9.Institute of Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, Athens, Greece 10.Office for Space Research and Technology, Academy of Athens, Athens, Greece |
| 推荐引用方式 GB/T 7714 | Guo,R. L.,Yao,Z. H.,Sergis,N.,et al. Long-standing Small-scale Reconnection Processes at Saturn Revealed by Cassini[J]. The Astrophysical Journal Letters,2019,884(1). |
| APA | Guo,R. L..,Yao,Z. H..,Sergis,N..,Wei,Y..,Xu,X. J..,...&Wan,W. X..(2019).Long-standing Small-scale Reconnection Processes at Saturn Revealed by Cassini.The Astrophysical Journal Letters,884(1). |
| MLA | Guo,R. L.,et al."Long-standing Small-scale Reconnection Processes at Saturn Revealed by Cassini".The Astrophysical Journal Letters 884.1(2019). |
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来源：地质与地球物理研究所
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