PMO OpenIR  > 太阳高能及相关物理过程研究团组
An improved method to derive the lower energy cutoff of non-thermal electrons from hard X-rays of solar flares
Gan, WQ; Li, YP; Chang, J; McTiernan, JM
2002-05-01
Source PublicationSOLAR PHYSICS
ISSN0038-0938
Volume207Issue:1Pages:137-147
AbstractBy changing a dimensionless calculation to a dimensional one, introducing a more accurate bremsstrahlung cross section, and using a more reasonable fitting energy range, we have recalculated the hard X-ray bremsstrahlung produced by a beam of power-law electrons with a lower energy cutoff (E-c). The method to deduce E-c from the hard X-ray spectral observations has therefore been refined in comparison with our previous one. The universality of this method has been clarified and discussed. We have applied this improved method to the 54 BATSE/Compton Gamma Ray Observatory (CGRO) hard X-ray events. It was found that about 44% of sample hard X-ray spectra can be directly explained by a beam of power-law electrons with a lower energy cutoff. The value of E-c, varying from 45 keV to 97 keV, is on average 60 keV. Another 44% of sample hard X-ray spectra might be explained by a beam of power-law electrons with the energy cutoff lower than 45 keV, which is however beyond the availability of BATSE/CGRO. Still another 11% sample hard X-ray spectra cannot be explained by a beam of power-law electrons with a lower energy cutoff. These results, based on the lower energy resolution data, however, should be compared in the future with that based on a higher energy resolution data, like the data from HESSI.
KeywordNonthermal Electrons Chromospheric Condensation Spectra Emission Models
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordNONTHERMAL ELECTRONS ; CHROMOSPHERIC CONDENSATION ; SPECTRA ; EMISSION ; MODELS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000175763600011
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7924
Collection太阳高能及相关物理过程研究团组
Affiliation1.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100864, Peoples R China
3.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
Recommended Citation
GB/T 7714
Gan, WQ,Li, YP,Chang, J,et al. An improved method to derive the lower energy cutoff of non-thermal electrons from hard X-rays of solar flares[J]. SOLAR PHYSICS,2002,207(1):137-147.
APA Gan, WQ,Li, YP,Chang, J,&McTiernan, JM.(2002).An improved method to derive the lower energy cutoff of non-thermal electrons from hard X-rays of solar flares.SOLAR PHYSICS,207(1),137-147.
MLA Gan, WQ,et al."An improved method to derive the lower energy cutoff of non-thermal electrons from hard X-rays of solar flares".SOLAR PHYSICS 207.1(2002):137-147.
Files in This Item:
File Name/Size DocType Version Access License
2002070An improved m(117KB) 开放获取LicenseView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Gan, WQ]'s Articles
[Li, YP]'s Articles
[Chang, J]'s Articles
Baidu academic
Similar articles in Baidu academic
[Gan, WQ]'s Articles
[Li, YP]'s Articles
[Chang, J]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Gan, WQ]'s Articles
[Li, YP]'s Articles
[Chang, J]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2002070An improved method to derive the lower energy cutoff of non-thermal electrons from hard X-rays of solar flares.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.