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On the positronium continuum and 0.511 MeV line in solar flares
Gan, WQ; Chang, J; Li, YP; Su, Y; Miroshnichenko, LI
2004-08-01
Source PublicationCHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
ISSN1009-9271
Volume4Issue:4Pages:357-364
AbstractWe have studied the influence of the density of the annihilation region on the positronium continuum. A relation between the ratio 3gamma/2gamma and the density is explicitly given, with which one can derive directly from the observed 3gamma/2gamma the density where the annihilation occurs. A unique solution may be found from the observed width of the 0.511 MeV line. We applied the method to three flares observed by GRS/SMM. It is shown that due to the measuring uncertainties in the 0.511 MeV line width, we cannot distinguish a chromospheric source from a coronal source, though both accurately localized. To improve the measuring accuracy of the 0.511 MeV line and the ratio 3gamma/2gamma will be an important step for a better understanding of the annihilation process in solar flares.
KeywordSun : Flares Sun : X-rays, Gamma-rays
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordCHROMOSPHERIC FLARE ; MAXIMUM-MISSION ; MAGNETIC LOOPS ; EMISSION ; MODELS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000223524200007
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7726
Collection太阳高能及相关物理过程研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.IZMIRAN, Troitsk 142190, Moscow Region, Russia
Recommended Citation
GB/T 7714
Gan, WQ,Chang, J,Li, YP,et al. On the positronium continuum and 0.511 MeV line in solar flares[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2004,4(4):357-364.
APA Gan, WQ,Chang, J,Li, YP,Su, Y,&Miroshnichenko, LI.(2004).On the positronium continuum and 0.511 MeV line in solar flares.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,4(4),357-364.
MLA Gan, WQ,et al."On the positronium continuum and 0.511 MeV line in solar flares".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 4.4(2004):357-364.
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