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Lower energy cutoff of nonthermal electrons derived from BATSE/CGRO hard X-ray observations
Gan, WQ ; Li, YP ; Chang, J
2002
Source PublicationSOLAR-TERRESTRIAL MAGNETIC ACTIVITY AND SPACE ENVIRONMENT
Volume14Pages:85—88
AbstractA quantitative method to determine the lower energy cutoff (Ec) of power-law electron beams has been established. We applied this method to the 54 hard X-ray events observed with BATSE/Compton Gamma Ray Observatory (CGRO). The results show that about 75% observed broken-down double power-law spectra of hard X-rays can be explained by the power-law electron beams with a lower energy cutoff. The values of E-c, 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 the nonthermal electrons might not be so important in powering a solar flare as previously thought. The further significance of this finding is discussed.
Subject AreaAstronomy & Astrophysics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7916
Collection太阳高能及相关物理过程研究团组
Recommended Citation
GB/T 7714
Gan, WQ,Li, YP,Chang, J. Lower energy cutoff of nonthermal electrons derived from BATSE/CGRO hard X-ray observations[J]. SOLAR-TERRESTRIAL MAGNETIC ACTIVITY AND SPACE ENVIRONMENT,2002,14:85—88.
APA Gan, WQ,Li, YP,&Chang, J.(2002).Lower energy cutoff of nonthermal electrons derived from BATSE/CGRO hard X-ray observations.SOLAR-TERRESTRIAL MAGNETIC ACTIVITY AND SPACE ENVIRONMENT,14,85—88.
MLA Gan, WQ,et al."Lower energy cutoff of nonthermal electrons derived from BATSE/CGRO hard X-ray observations".SOLAR-TERRESTRIAL MAGNETIC ACTIVITY AND SPACE ENVIRONMENT 14(2002):85—88.
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