DOI: 10.1002/grl.50617
论文题名: Proton entry into the near-lunar plasma wake for magnetic field aligned flow
作者: Dhanya M.B. ; Bhardwaj A. ; Futaana Y. ; Fatemi S. ; Holmström M. ; Barabash S. ; Wieser M. ; Wurz P. ; Alok A. ; Thampi R.S.
刊名: Geophysical Research Letters
ISSN: 0094-8904
EISSN: 1944-8635
出版年: 2013
卷: 40, 期: 12 起始页码: 2913
结束页码: 2917
语种: 英语
英文关键词: aligned flow
; Chandrayaan-1
; lunar
; plasma wake
; SARA
; solar wind
Scopus关键词: aligned flow
; Chandrayaan-1
; lunar
; Plasma wakes
; SARA
; Electric fields
; Magnetic fields
; Moon
; Plasmas
; Solar wind
; Wakes
; Protons
; atmospheric electricity
; electron
; interplanetary dust
; lunar crust
; magnetic field
; plasma
; solar wind
; wake
; wind velocity
英文摘要: We report the first observation of protons in the near-lunar (100-200 km from the surface) and deeper (near anti-subsolar point) plasma wake when the interplanetary magnetic field (IMF) and solar wind velocity (vsw) are parallel (aligned flow; angle between IMF and vsw≤). More than 98% of the observations during aligned flow condition showed the presence of protons in the wake. These observations are obtained by the Solar Wind Monitor sensor of the Sub-keV Atom Reflecting Analyser experiment on Chandrayaan-1. The observation cannot be explained by the conventional fluid models for aligned flow. Back tracing of the observed protons suggests that their source is the solar wind. The larger gyroradii of the wake protons compared to that of solar wind suggest that they were part of the tail of the solar wind velocity distribution function. Such protons could enter the wake due to their large gyroradii even when the flow is aligned to IMF. However, the wake boundary electric field may also play a role in the entry of the protons into the wake. Key Points First observation of protons in the near and deeper lunar wake for aligned flow Back-tracing suggest that the protons indeed could be of solar wind origin The protons could enter the wake due to their larger gyro-radii ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880556861&doi=10.1002%2fgrl.50617&partnerID=40&md5=9a05c7e9b805401815130dcd523ae249
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6168
Appears in Collections: 气候减缓与适应
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作者单位: Space Physics Laboratory, Vikram Sarabhai Space Centre, Thiruvananthapuram 695022, India
Recommended Citation:
Dhanya M.B.,Bhardwaj A.,Futaana Y.,et al. Proton entry into the near-lunar plasma wake for magnetic field aligned flow[J]. Geophysical Research Letters,2013-01-01,40(12).