A Rotating Azimuthally Distributed Auroral Current System on Saturn Revealed by the Cassini Spacecraft
文献类型：期刊论文
| 作者 | Guo,R. L.1,9,10; Yao,Z. H.1; Dunn,W. R.7,8; Palmaerts,B.10; Sergis,N.5,6; Grodent,D.10; Badman,S. V.4; Ye,S. Y.3; Pu,Z. Y.16; Mitchell,D. G.2 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2021-10-01 |
| 卷号 | 919期号:2 |
| ISSN号 | 2041-8205 |
| 关键词 | Planetary magnetospheres Saturn Aurorae |
| DOI | 10.3847/2041-8213/ac26b5 |
| 英文摘要 | Abstract Stunning aurorae are mainly produced when accelerated electrons travel along magnetic field lines to collide with the atmosphere. The motion of electrons often corresponds to the evolution of a magnetic field-aligned current system. In the terrestrial magnetosphere, the current system is formed at the night-side sector, and thus produces an auroral bulge at night. Due to the different energy sources between Saturn and the Earth, it is expected that their auroral current systems are fundamentally different, although the specific auroral driver at Saturn is poorly understood. Using simultaneous measurements of the aurora, particles, magnetic fields, and energetic neutral atoms, we reveal that a chain of paired currents, each of which includes a downward and an upward current branch, is formed in Saturn's magnetosphere, which generates separated auroral patches. These findings inform similar auroral current structures between the Earth and Saturn, while the difference is that Saturn's unique mass and energy sources lead to a rotational characteristic. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:2041-8205-919-2-AC26B5 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102690]  |
| 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 |
| 通讯作者 | Guo,R. L. |
| 作者单位 | 1.Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, People’s Republic of ChinaRuilong.guo@uliege.be, z.yao@ucl.ac.uk 2.Applied Physics Laboratory, Johns Hopkins University, Laurel, MD 20723, USA 3.Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen 518055, People’s Republic of China 4.Department of Physics, Lancaster University, Lancaster LA1 4YB, UK 5.Institute of Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, Athens 118 10, Greece 6.Office of Space Research and Technology, Academy of Athens, Athens 106 79, Greece 7.Centre for Planetary Sciences at UCL/Birkbeck, London WC1E 6BT, UK 8.Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking RH5 6NT, UK 9.Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, School of Space Science and Physics, Shandong University, Weihai, Shandong, People’s Republic of China 10.Laboratory for Planetary and Atmospheric Physics, STAR Institute, Université de Liège, Liège B-4000, Belgium |
| 推荐引用方式 GB/T 7714 | Guo,R. L.,Yao,Z. H.,Dunn,W. R.,et al. A Rotating Azimuthally Distributed Auroral Current System on Saturn Revealed by the Cassini Spacecraft[J]. The Astrophysical Journal Letters,2021,919(2). |
| APA | Guo,R. L..,Yao,Z. H..,Dunn,W. R..,Palmaerts,B..,Sergis,N..,...&Dougherty,M. K..(2021).A Rotating Azimuthally Distributed Auroral Current System on Saturn Revealed by the Cassini Spacecraft.The Astrophysical Journal Letters,919(2). |
| MLA | Guo,R. L.,et al."A Rotating Azimuthally Distributed Auroral Current System on Saturn Revealed by the Cassini Spacecraft".The Astrophysical Journal Letters 919.2(2021). |
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来源：地质与地球物理研究所
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