DOI: 10.1002/2014GL060229
论文题名: Dayside/nightside asymmetry of ion densities and velocities in Saturn's inner magnetosphere
作者: Holmberg M.M.K.G. ; Wahlund J.-E. ; Morooka M.W.
刊名: Geophysical Research Letters
ISSN: 0094-10609
EISSN: 1944-10340
出版年: 2014
卷: 41, 期: 11 起始页码: 3717
结束页码: 3723
语种: 英语
英文关键词: Cassini
; day/night asymmetry
; E-ring
; plasma disk
; Saturn's magnetosphere
Scopus关键词: Electric fields
; Langmuir probes
; Magnetosphere
; Planets
; Cassini
; day/night asymmetry
; E-ring
; Inner magnetosphere
; Langmuir probe measurements
; Negatively charged
; Radiation pressure
; Radio and plasma wave science
; Ions
; asymmetry
; dust
; electric field
; magnetosphere
; planetary atmosphere
; radio wave
; Saturn
英文摘要: We present Radio and Plasma Wave Science Langmuir probe measurements from 129 Cassini orbits, which show a day/night asymmetry in both ion density and ion velocity in the radial region 4-6 RS (1 RS = 60,268 km) from the center of Saturn. The ion densities ni vary from an average of ∼35 cm-3 around noon up to ∼70 cm-3 around midnight. The ion velocities vi,θ vary from ∼28-32 km/s at the lowest dayside values to ∼36-40 km/s at the highest nightside values. The day/night asymmetry is suggested to be due to the radiation pressure force acting on negatively charged nanometer-sized dust of the E ring. This force will introduce an extra grain and ion drift component equivalent to the force of an additional electric field of 0.1-2 mV/m for 10-50 nm sized grains. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901889595&doi=10.1002%2f2014GL060229&partnerID=40&md5=c5ed8b8a44b9e7a89d5c5d553cba8854
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7873
Appears in Collections: 气候减缓与适应
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作者单位: Swedish Institute of Space Physics, Uppsala, Sweden
Recommended Citation:
Holmberg M.M.K.G.,Wahlund J.-E.,Morooka M.W.. Dayside/nightside asymmetry of ion densities and velocities in Saturn's inner magnetosphere[J]. Geophysical Research Letters,2014-01-01,41(11).