DOI: 10.1002/grl.50529
论文题名: An indication of the existence of a solar wind strahl at 10 AU
作者: Walsh A.P. ; Arridge C.S. ; Masters A. ; Lewis G.R. ; Fazakerley A.N. ; Jones G.H. ; Owen C.J. ; Coates A.J.
刊名: Geophysical Research Letters
ISSN: 0094-8971
EISSN: 1944-8702
出版年: 2013
卷: 40, 期: 11 起始页码: 2495
结束页码: 2499
语种: 英语
英文关键词: electrons
; heliosphere
; solar wind
; strahl
Scopus关键词: Electron distributions
; Electron pitch angle
; Heliocentric distances
; Heliospheres
; Interplanetary magnetic fields
; Measurements of
; Physical process
; strahl
; Electrons
; Solar wind
; electron
; magnetic field
; planetary atmosphere
; scattering
; solar wind
英文摘要: The solar wind electron distribution is observed near and within 1 AU to consist of three components: a thermal core, a suprathermal halo, and a suprathermal strahl. The former two components are isotropic, while the strahl is field aligned and flows outward along the interplanetary magnetic field. The evolution of solar wind electrons with heliocentric distance is poorly understood; although the halo is thought to be formed through pitch angle (PA) scattering of the strahl, the responsible physical process has not been conclusively identified. Measurements of solar wind electrons throughout the heliosphere are required to solve this problem. We present the first observations of the suprathermal components of the solar wind electron distribution made outside 5 AU. We find indications of a strahl component narrower than that predicted by extrapolating observations and models of electrons in the inner heliosphere, suggesting the rate of electron pitch angle scattering in the solar wind can decrease with increasing heliocentric distance. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879900558&doi=10.1002%2fgrl.50529&partnerID=40&md5=f02658996f4ec3edd1bc1d1bd52954ad
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6235
Appears in Collections: 气候减缓与适应
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作者单位: Department of Space and Climate Physics, University College London, Mullard Space Science Laboratory, Holmbury St. Mary, United Kingdom
Recommended Citation:
Walsh A.P.,Arridge C.S.,Masters A.,et al. An indication of the existence of a solar wind strahl at 10 AU[J]. Geophysical Research Letters,2013-01-01,40(11).