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	Solar Wind similar to 0.1-1.5 keV Electrons at Quiet Times
	Tao, Jiawei ; Wang, Linghua ; Zong, Qiugang ; Li, Gang ; Salem, Chadi S. ; Wimmer-Schweingruber, Robert F. ; He, Jiansen ; Tu, Chuanyi ; Bale, Stuart D.
	2016
关键词	KEV SUPERHALO ELECTRONS SPACE PLASMAS
英文摘要	We present a statistical survey of the energy spectrum of solar wind suprathermal (similar to 0.1-1.5 keV) electrons measured by the WIND 3-D Plasma & Energetic Particle (3DP) instrument at 1 AU during quiet times at the minimum and maximum of solar cycles 23 and 24. Firstly, we separate strahl (beaming) electrons and halo (isotropic) electrons based on their features in pitch angle distributions. Secondly, we fit the observed energy spectrum of both the strahl and halo electrons at similar to 0.1-1.5 keV to a Kappa distribution function with an index kappa, effective temperature T-eff and density n(0). We also integrate the the measurements over similar to 0.1-1.5 keV to obtain the average electron energy E-avg of the strahl and halo. We find a strong positive correlation between kappa and T-eff for both the strahl and halo, possibly reflecting the nature of the generation of these suprathermal electrons. Among the 245 selected samples, similar to 68% have the halo kappa smaller than the strahl kappa, while similar to 50% have the halo E-h larger than the strahl E-s.; NSFC [41421003, 41424172, 41474148, 41231069]; German space agency DLR [50 OT 1202, 50 OC 1501]; ISSI; NASA [NNX12AL11G, NNX14AC07G, NNX14AC08G, NNX15AJ93G]; CPCI-S(ISTP); wanglhwang@gmail.com; 1720
语种	英语
出处	14th International Solar Wind Conference (Solar Wind)
DOI标识	10.1063/1.4943843
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/459694]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Tao, Jiawei,Wang, Linghua,Zong, Qiugang,et al. Solar Wind similar to 0.1-1.5 keV Electrons at Quiet Times. 2016-01-01.

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