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MESSENGER Observations of Disappearing Dayside Magnetosphere Events at Mercury

文献类型：期刊论文

作者Slavin, J. A.8; Middleton, H. R.7; Raines, J. M.8; Jia, Xianzhe8; Zhong, J.6; Sun, W-J8; Livi, S.5,8; Imber, S. M.4,8; Poh, G-K3,8; Akhavan-Tafti, M.8
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期2019-08-01
卷号124期号:8页码:6613-6635
关键词Mercury magnetosphere exosphere reconnection induction coronal mass ejections
ISSN号2169-9380
DOI10.1029/2019JA026892
英文摘要MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) measurements taken during passes over Mercury's dayside hemisphere indicate that on four occasions the spacecraft remained in the magnetosheath even though it reached altitudes below 300 km. During these disappearing dayside magnetosphere (DDM) events, the spacecraft did not encounter the magnetopause until it was at very high magnetic latitudes, similar to 66 to 80 degrees. These DDM events stand out with respect to their extremely high solar wind dynamic pressures, P-sw similar to 140 to 290 nPa, and intense southward magnetic fields, B-z similar to -100 to -400 nT, measured in the magnetosheath. In addition, the bow shock was observed very close to the surface during these events with a subsolar altitude of similar to 1,200 km. It is suggested that DDM events, which are closely associated with coronal mass ejections, are due to solar wind compression and/or reconnection-driven erosion of the dayside magnetosphere. The very low altitude of the bow shock during these events strongly suggests that the solar wind impacts much of Mercury's sunlit hemisphere during these events. More study of these disappearing dayside events is required, but it is likely that solar wind sputtering of neutrals from the surface into the exosphere maximizes during these intervals.
WOS关键词FLUX-TRANSFER EVENTS ; INTERPLANETARY MAGNETIC-FIELD ; BOW SHOCK ; HYBRID SIMULATION ; WIND ; MAGNETOPAUSE ; PLASMA ; SURFACE ; FLOW ; INSTRUMENT
资助项目NASA[NNX16AJ67G] ; NASA[NNX15AL01G] ; NASA[NNX16AJ03G] ; NASA[80NSSC18K1137]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000490956600015
出版者AMER GEOPHYSICAL UNION
资助机构NASA ; NASA ; NASA ; NASA ; NASA ; NASA ; NASA ; NASA
源URL[http://ir.iggcas.ac.cn/handle/132A11/93920]  
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Slavin, J. A.
作者单位1.Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA
2.CALTECH, Jet Prop Lab, Pasadena, CA USA
3.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA
4.Univ Leicester, Leicester, Leics, England
5.Southwest Res Inst, San Antonio, TX USA
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
7.ESA, European Space & Astron Ctr, Madrid, Spain
8.Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA
推荐引用方式
GB/T 7714		 Slavin, J. A.,Middleton, H. R.,Raines, J. M.,et al. MESSENGER Observations of Disappearing Dayside Magnetosphere Events at Mercury[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2019,124(8):6613-6635.
APA Slavin, J. A..,Middleton, H. R..,Raines, J. M..,Jia, Xianzhe.,Zhong, J..,...&Mays, M. L..(2019).MESSENGER Observations of Disappearing Dayside Magnetosphere Events at Mercury.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,124(8),6613-6635.
MLA Slavin, J. A.,et al."MESSENGER Observations of Disappearing Dayside Magnetosphere Events at Mercury".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 124.8(2019):6613-6635.

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来源：地质与地球物理研究所

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