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Reconnection Acceleration in Saturn's Dayside Magnetodisk: A Multicase Study with Cassini

文献类型：期刊论文

作者Guo, R. L.1,2; Yao, Z. H.2; Sergis, N.3,4; Wei, Y.1,5; Mitchell, D.6; Roussos, E.7; Palmaerts, B.2; Dunn, W. R.8; Radioti, A.2; Ray, L. C.9
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2018-12-01
卷号868期号:2页码:8
ISSN号2041-8205
关键词acceleration of particles magnetic reconnection planetary systems
DOI10.3847/2041-8213/aaedab
英文摘要Recently, rotationally driven magnetic reconnection was first discovered in Saturn's dayside magnetosphere. This newly confirmed process could potentially drive bursty phenomena at Saturn, i.e., pulsating energetic particles and auroral emissions. Using Cassini's measurements of magnetic fields and charged particles, we investigate particle acceleration features during three magnetic reconnection events observed in Saturn's dayside magnetodisk. The results suggest that the rotationally driven reconnection process plays a key role in producing energetic electrons (up to 100 keV) and ions (several hundreds of kiloelectron volts). In particular, we find that energetic oxygen ions are locally accelerated at all three reconnection sites. Isolated, multiple reconnection sites were recorded in succession during an interval lasting for much less than one Saturn rotation period. Moreover, a secondary magnetic island is reported for the first time at the dayside, collectively suggesting that the reconnection process is not steady and could be "drizzle-like." This study demonstrates the fundamental importance of internally driven magnetic reconnection in accelerating particles in Saturn's dayside magnetosphere, and likewise in the rapidly rotating Jovian magnetosphere and beyond.
WOS关键词MAGNETIC RECONNECTION ; ELECTRON ACCELERATION ; PLASMA ; FIELD ; MAGNETOSPHERE ; MAGNETOPAUSE ; MAGNETOTAIL
资助项目National Science Foundation of China[41704169] ; National Science Foundation of China[41525016] ; National Science Foundation of China[41474155] ; National Science Foundation of China[41274167] ; Belgian Federal Science Policy Office (BELSPO) via the PRODEX Programme of ESA ; STFC Consolidated Grant[ST/R000816/1] ; NASA JPL[1243218] ; NASA JPL[1405851] ; STFC consolidated grants[ST/K000977/1] ; STFC consolidated grants[ST/N000722/1]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000450844500007
资助机构National Science Foundation of China ; National Science Foundation of China ; Belgian Federal Science Policy Office (BELSPO) via the PRODEX Programme of ESA ; Belgian Federal Science Policy Office (BELSPO) via the PRODEX Programme of ESA ; STFC Consolidated Grant ; STFC Consolidated Grant ; NASA JPL ; NASA JPL ; STFC consolidated grants ; STFC consolidated grants ; National Science Foundation of China ; National Science Foundation of China ; Belgian Federal Science Policy Office (BELSPO) via the PRODEX Programme of ESA ; Belgian Federal Science Policy Office (BELSPO) via the PRODEX Programme of ESA ; STFC Consolidated Grant ; STFC Consolidated Grant ; NASA JPL ; NASA JPL ; STFC consolidated grants ; STFC consolidated grants ; National Science Foundation of China ; National Science Foundation of China ; Belgian Federal Science Policy Office (BELSPO) via the PRODEX Programme of ESA ; Belgian Federal Science Policy Office (BELSPO) via the PRODEX Programme of ESA ; STFC Consolidated Grant ; STFC Consolidated Grant ; NASA JPL ; NASA JPL ; STFC consolidated grants ; STFC consolidated grants ; National Science Foundation of China ; National Science Foundation of China ; Belgian Federal Science Policy Office (BELSPO) via the PRODEX Programme of ESA ; Belgian Federal Science Policy Office (BELSPO) via the PRODEX Programme of ESA ; STFC Consolidated Grant ; STFC Consolidated Grant ; NASA JPL ; NASA JPL ; STFC consolidated grants ; STFC consolidated grants
源URL[http://ir.iggcas.ac.cn/handle/132A11/89438]  
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.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
2.Univ Liege, STAR Inst, Lab Phys Atmospher & Planetaire, Liege, Belgium
3.Acad Athens, Off Space Res & Technol, Athens, Greece
4.Natl Observ Athens, Inst Astron Astrophys Space Applicat & Remote Sen, Athens, Greece
5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
6.Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA
7.Max Planck Inst Sonnensyst Forsch, Gottingen, Germany
8.Univ Coll London, Mullard Space Sci Lab, Holmbury St Mary, Dorking RH5 6NT, Surrey, England
9.Univ Lancaster, Dept Phys, Lancaster LA14 YB, England
10.Southwest Res Inst, San Antonio, TX USA
推荐引用方式
GB/T 7714		 Guo, R. L.,Yao, Z. H.,Sergis, N.,et al. Reconnection Acceleration in Saturn's Dayside Magnetodisk: A Multicase Study with Cassini[J]. ASTROPHYSICAL JOURNAL LETTERS,2018,868(2):8.
APA Guo, R. L..,Yao, Z. H..,Sergis, N..,Wei, Y..,Mitchell, D..,...&Wan, W. X..(2018).Reconnection Acceleration in Saturn's Dayside Magnetodisk: A Multicase Study with Cassini.ASTROPHYSICAL JOURNAL LETTERS,868(2),8.
MLA Guo, R. L.,et al."Reconnection Acceleration in Saturn's Dayside Magnetodisk: A Multicase Study with Cassini".ASTROPHYSICAL JOURNAL LETTERS 868.2(2018):8.

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来源：地质与地球物理研究所

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