| DOI: | 10.1002/2014GL060468
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| 论文题名: | Ion kinetic properties in Mercury's pre-midnight plasma sheet |
| 作者: | Gershman D.J.; Slavin J.A.; Raines J.M.; Zurbuchen T.H.; Anderson B.J.; Korth H.; Baker D.N.; Solomon S.C.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9845
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| EISSN: | 1944-9576
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| 出版年: | 2014
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| 卷: | 41, 期:16 | | 起始页码: | 5740
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| 结束页码: | 5747
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| 语种: | 英语
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| Scopus关键词: | Boltzmann equation
; Electric potential
; Magnetosphere
; Mercury (metal)
; Plasma sheaths
; Solar wind
; Centrifugal acceleration
; Ion temperature
; Maxwell-Boltzmann distribution
; MErcury Surface
; Mercury's magnetosphere
; Solar-wind ions
; Space environment
; Thermal pressure
; Ions
; acceleration
; energetics
; kinetics
; magnetosphere
; Mercury (planet)
; planetary atmosphere
; plasma
; solar wind
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| 英文摘要: | With data from the Fast Imaging Plasma Spectrometer sensor on the MErcury Surface, Space ENvironment, GEochemistry, and Ranging spacecraft, we demonstrate that the average distributions for both solar wind and planetary ions in Mercury's pre-midnight plasma sheet are well-described by hot Maxwell-Boltzmann distributions. Temperatures and densities of the H+-dominated plasma sheet, in the ranges ~1-10 cm-3 and ~5-30MK, respectively, maintain thermal pressures of ~1 nPa. The dominant planetary ion, Na+, has number densities about 10% that of H+. Solar wind ions retain near-solar-wind abundances with respect to H+ and exhibit mass-proportional ion temperatures, indicative of a reconnection-dominated heating in the magnetosphere. Conversely, planetary ion species are accelerated to similar average energies greater by a factor of ~1.5 than that of H+. This energization is suggestive of acceleration in an electric potential, consistent with the presence of a strong centrifugal acceleration process in Mercury's magnetosphere. © 2014. American Geophysical Union. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84906529260&doi=10.1002%2f2014GL060468&partnerID=40&md5=de2ed52df5de4739ada73d1e08df6b9e
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7109
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Geospace Physics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States
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| Recommended Citation: | |
Gershman D.J.,Slavin J.A.,Raines J.M.,et al. Ion kinetic properties in Mercury's pre-midnight plasma sheet[J]. Geophysical Research Letters,2014-01-01,41(16).
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