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SIMULATIONS OF A GRADUAL SOLAR ENERGETIC PARTICLE EVENT OBSERVED BY HELIOS 1, HELIOS 2, AND IMP 8
Qin, Gang; Wang, Yang; Qin, G (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Department空间科学部
Source PublicationASTROPHYSICAL JOURNAL
2015
Volume809Issue:2Pages:177
ISSN0004-637X
Language英语
KeywordSun: Activity Sun: Coronal Mass Ejections (Cmes) Sun: Particle Emission
AbstractIn this work, a gradual solar energetic particle (SEP) event observed by multi-spacecraft has been simulated. The time profiles of SEP fluxes accelerated by an interplanetary shock in the three-dimensional interplanetary space are obtained by solving numerically the Fokker-Planck focused transport equation. The interplanetary shock is modeled as a moving source of energetic particles. By fitting the 1979 March 01 SEP fluxes observed by Helios 1, Helios 2, and IMP 8 with our simulations, we obtain the best parameters for the shock acceleration efficiency model. And we also find that the particle perpendicular diffusion coefficient with the level of similar to 1%-3% of parallel diffusion coefficient at 1 AU should be included. The reservoir phenomenon is reproduced in the simulations, and the longitudinal gradient of SEP fluxes in the decay phase, which is observed by three spacecraft at different locations, is more sensitive to the shock acceleration efficiency parameters than that is to the perpendicular diffusion coefficient.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/5091
Collection空间科学部
Corresponding AuthorQin, G (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Qin, Gang,Wang, Yang,Qin, G . SIMULATIONS OF A GRADUAL SOLAR ENERGETIC PARTICLE EVENT OBSERVED BY HELIOS 1, HELIOS 2, AND IMP 8[J]. ASTROPHYSICAL JOURNAL,2015,809(2):177.
APA Qin, Gang,Wang, Yang,&Qin, G .(2015).SIMULATIONS OF A GRADUAL SOLAR ENERGETIC PARTICLE EVENT OBSERVED BY HELIOS 1, HELIOS 2, AND IMP 8.ASTROPHYSICAL JOURNAL,809(2),177.
MLA Qin, Gang,et al."SIMULATIONS OF A GRADUAL SOLAR ENERGETIC PARTICLE EVENT OBSERVED BY HELIOS 1, HELIOS 2, AND IMP 8".ASTROPHYSICAL JOURNAL 809.2(2015):177.
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