COMPARISON BETWEEN PATH LENGTHS TRAVELED BY SOLAR ELECTRONS AND IONS IN   GROUND-LEVEL ENHANCEMENT EVENTS

doi:10.1088/0004-637X/768/1/68

CORC > 北京大学 > 地球与空间科学学院

	COMPARISON BETWEEN PATH LENGTHS TRAVELED BY SOLAR ELECTRONS AND IONS IN GROUND-LEVEL ENHANCEMENT EVENTS
	Tan, Lun C. ; Malandraki, Olga E. ; Reames, Donald V. ; Ng, Chee K. ; Wang, Linghua ; Patsou, Ioanna ; Papaioannou, Athanasios
刊名	astrophysical journal
	2013
关键词	acceleration of particles Sun: coronal mass ejections (CMEs) Sun: flares Sun: particle emission Sun: radio radiation ENERGETIC PARTICLE EVENTS CORONAL MASS EJECTIONS MAGNETIC-FIELD LINES WIND SPACECRAFT RELEASE TIMES RADIO-BURST TRANSPORT PLASMA EARTH PROPAGATION
DOI	10.1088/0004-637X/768/1/68
英文摘要	We have examined the Wind/3DP/SST electron and Wind/EPACT/LEMT ion data to investigate the path length difference between solar electrons and ions in the ground-level enhancement (GLE) events in solar cycle 23. Assuming that the onset time of metric type II or decameter-hectometric (DH) type III radio bursts is the solar release time of non-relativistic electrons, we have found that within an error range of +/- 10% the deduced path length of low-energy (similar to 27 keV) electrons from their release site near the Sun to the 1 AU observer is consistent with the ion path length deduced by Reames from the onset time analysis. In addition, the solar longitude distribution and IMF topology of the GLE events examined are in favor of the coronal mass ejection-driven shock acceleration origin of observed non-relativistic electrons. We have also found an increase of electron path lengths with increasing electron energies. The increasing rate of path lengths is correlated with the pitch angle distribution (PAD) of peak electron intensities locally measured, with a higher rate corresponding to a broader PAD. The correlation indicates that the path length enhancement is due to the interplanetary scattering experienced by first arriving electrons. The observed path length consistency implies that the maximum stable time of magnetic flux tubes, along which particles transport, could reach 4.8 hr.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000317960500068&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Astronomy & Astrophysics; SCI(E); 6; ARTICLE; 1; 768
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/391673]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Tan, Lun C.,Malandraki, Olga E.,Reames, Donald V.,et al. COMPARISON BETWEEN PATH LENGTHS TRAVELED BY SOLAR ELECTRONS AND IONS IN GROUND-LEVEL ENHANCEMENT EVENTS[J]. astrophysical journal,2013.
APA	Tan, Lun C..,Malandraki, Olga E..,Reames, Donald V..,Ng, Chee K..,Wang, Linghua.,...&Papaioannou, Athanasios.(2013).COMPARISON BETWEEN PATH LENGTHS TRAVELED BY SOLAR ELECTRONS AND IONS IN GROUND-LEVEL ENHANCEMENT EVENTS.astrophysical journal.
MLA	Tan, Lun C.,et al."COMPARISON BETWEEN PATH LENGTHS TRAVELED BY SOLAR ELECTRONS AND IONS IN GROUND-LEVEL ENHANCEMENT EVENTS".astrophysical journal (2013).