QUIET-TIME SUPRATHERMAL (similar to 0.1-1.5 keV) ELECTRONS IN THE SOLAR   WIND

doi:10.3847/0004-637X/820/1/22

CORC > 北京大学 > 地球与空间科学学院

	QUIET-TIME SUPRATHERMAL (similar to 0.1-1.5 keV) ELECTRONS IN THE SOLAR WIND
	Tao, Jiawei ; Wang, Linghua ; Zong, Qiugang ; Li, Gang ; Salem, Chadi S. ; Wimmer-Schweingruber, Robert F. ; He, Jiansen ; Tu, Chuanyi ; Bale, Stuart D.
刊名	ASTROPHYSICAL JOURNAL
	2016
关键词	acceleration of particles solar wind Sun: particle emission VELOCITY DISTRIBUTION-FUNCTIONS HELIOS PLASMA-EXPERIMENT KEV SUPERHALO ELECTRONS CORONA DISTRIBUTIONS MODEL HALO
DOI	10.3847/0004-637X/820/1/22
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. 3DP instrument at 1 AU during quiet times at the minimum and maximum of solar cycles 23 and 24. After separating (beaming) strahl electrons from (isotropic) halo electrons according to their different behaviors in the angular distribution, we fit the observed energy spectrum of both strahl and halo electrons at similar to 0.1-1.5 keV to a Kappa distribution function with an index. and effective temperature T-eff. We also calculate the number density n and average energy E-avg of strahl and halo electrons by integrating the electron measurements between similar to 0.1 and 1.5 keV. We find a strong positive correlation between kappa and T-eff for both strahl and halo electrons, and a strong positive correlation between the strahl n and halo n, likely reflecting the nature of the generation of these suprathermal electrons. In both solar cycles, kappa is larger at solar minimum than at solar maximum for both strahl and halo electrons. The halo kappa is generally smaller than the strahl kappa (except during the solar minimum of cycle 23). The strahl n is larger at solar maximum, but the halo n shows no difference between solar minimum and maximum. Both the strahl n and halo n have no clear association with the solar wind core population, but the density ratio between the strahl and halo roughly anti-correlates (correlates) with the solar wind density (velocity).; NSFC [41421003, 41274172, 41474148, 41231069, 41574168, 41474147]; German space agency DLR [50 OT 1202, 50 OC 1501]; ISSI; NASA [NNX13AL11G, NNX14AC07G, NNX14AC08G, NNX15AJ93G]; SCI(E); ARTICLE; wanglhwang@gmail.com; 1; 820
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/438431]
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. QUIET-TIME SUPRATHERMAL (similar to 0.1-1.5 keV) ELECTRONS IN THE SOLAR WIND[J]. ASTROPHYSICAL JOURNAL,2016.
APA	Tao, Jiawei.,Wang, Linghua.,Zong, Qiugang.,Li, Gang.,Salem, Chadi S..,...&Bale, Stuart D..(2016).QUIET-TIME SUPRATHERMAL (similar to 0.1-1.5 keV) ELECTRONS IN THE SOLAR WIND.ASTROPHYSICAL JOURNAL.
MLA	Tao, Jiawei,et al."QUIET-TIME SUPRATHERMAL (similar to 0.1-1.5 keV) ELECTRONS IN THE SOLAR WIND".ASTROPHYSICAL JOURNAL (2016).