On the lower energy cutoff of nonthermal electrons in solar flares

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳高能及相关物理过程研究团组

	On the lower energy cutoff of nonthermal electrons in solar flares
	Gan, WQ; Li, YP; Chang, J
刊名	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2001-10-01
卷号	1 期号:5 页码:453-459
关键词	Sun : hard X-rays Sun : gamma-rays Sun : flares Sun : particles
ISSN号	1009-9271
英文摘要	A quantitative method to determine the lower energy cutoff (E,) of power-law electron beams is established. We apply this method to the 54 hard X-ray events observed with BATSE/Compton Gamma Ray Observatory (CGRO). The results show that about 75% of the observed broken double power-law spectra of hard X-rays can be explained by a lower energy cutoff in the power-law electron beams. The values of E,, varying among the flares, are all greater than the usually accepted 20 keV! On average, E-c is about 69 keV. So high a lower energy cutoff of nonthermal electrons implies that nonthermal electrons might not be as important in powering solar flares as was previously thought. Further significance of this finding is discussed.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	X-RAY OBSERVATIONS ; CHROMOSPHERIC CONDENSATION ; MODEL
收录类别	SCI
语种	英语
WOS记录号	WOS:000172419200009
公开日期	2013-01-31
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8194]
专题	紫金山天文台_太阳高能及相关物理过程研究团组
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Gan, WQ,Li, YP,Chang, J. On the lower energy cutoff of nonthermal electrons in solar flares[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2001,1(5):453-459.
APA	Gan, WQ,Li, YP,&Chang, J.(2001).On the lower energy cutoff of nonthermal electrons in solar flares.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,1(5),453-459.
MLA	Gan, WQ,et al."On the lower energy cutoff of nonthermal electrons in solar flares".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 1.5(2001):453-459.