DOI: 10.1002/grl.50579
论文题名: Extreme densities in Titan's ionosphere during the T85 magnetosheath encounter
作者: Edberg N.J.T. ; Andrews D.J. ; Shebanits O. ; Ågren K. ; Wahlund J.-E. ; Opgenoorth H.J. ; Roussos E. ; Garnier P. ; Cravens T.E. ; Badman S.V. ; Modolo R. ; Bertucci C. ; Dougherty M.K.
刊名: Geophysical Research Letters
ISSN: 0094-8847
EISSN: 1944-8578
出版年: 2013
卷: 40, 期: 12 起始页码: 2879
结束页码: 2883
语种: 英语
英文关键词: Cassini
; ionization
; ionosphere
; magnetosheath
; Titan
Scopus关键词: Cassini
; Coronal mass ejection
; Electron number densities
; Ionospheric electron densities
; Langmuir probe measurements
; Magnetosheaths
; Solar zenith angle
; Titan
; Impact ionization
; Ionization
; Ionospheric measurement
; Solar wind
; Ionosphere
; electron density
; ionization
; ionosphere
; magnetopause
; magnetosphere
; planetary atmosphere
; probe
; Saturn
; spacecraft
; Titan
; zenith angle
英文摘要: We present Cassini Langmuir probe measurements of the highest electron number densities ever reported from the ionosphere of Titan. The measured density reached 4310 cm-3 during the T85 Titan flyby. This is at least 500 cm-3 higher than ever observed before and at least 50% above the average density for similar solar zenith angles. The peak of the ionospheric density is not reached on this flyby, making the maximum measured density a lower limit. During this flyby, we also report that an impacting coronal mass ejection (CME) leaves Titan in the magnetosheath of Saturn, where it is exposed to shocked solar wind plasma for at least 2 h 45 min. We suggest that the solar wind plasma in the magnetosheath during the CME conditions significantly modifies Titan's ionosphere by an addition of particle impact ionization by precipitating protons. Key Points Titan is located in the magnetosheath of Saturn during the T85 flyby The highest ever ionospheric electron densities at Titan are found during T85 The magnetosheath encounter and the extreme densities are due to a CME impact ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880555467&doi=10.1002%2fgrl.50579&partnerID=40&md5=1c9f6683f8b2938fb93f201f518ec83c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6111
Appears in Collections: 气候减缓与适应
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作者单位: Swedish Institute of Space Physics, Box 537, Uppsala, SE-75121, Sweden
Recommended Citation:
Edberg N.J.T.,Andrews D.J.,Shebanits O.,et al. Extreme densities in Titan's ionosphere during the T85 magnetosheath encounter[J]. Geophysical Research Letters,2013-01-01,40(12).