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PROPAGATION OF SOLAR ENERGETIC PARTICLES IN THREE-DIMENSIONAL INTERPLANETARY MAGNETIC FIELDS
Zhang, M.; Qin, G.; Rassoul, H.; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationAstrophysical Journal
2009
Volume692Issue:1Pages:109-132
ISSN0004-637X
Language英语
KeywordSun: Particle Emission Sun: Coronal Mass Ejections (Cmes) Sun: Flares Sun: Magnetic Fields Interplanetary Medium Hydromagnetic Wave Excitation Mean Free Paths Cosmic-rays Charged-particles Perpendicular Transport Inner Heliosphere Nonlinear Parallel Ion Acceleration Alfven Waves Model
AbstractThis paper presents a model calculation of solar energetic particle propagation in a three-dimensional interplanetary magnetic field. The model includes essentially all the particle transport mechanisms: streaming along magnetic field lines, convection with the solar wind, pitch-angle diffusion, focusing by the inhomogeneous interplanetary magnetic field, perpendicular diffusion, and pitch-angle dependent adiabatic cooling by the expanding solar wind. We solve the Fokker-Planck transport equation with simulation of backward stochastic processes in a fixed reference frame in which any spacecraft is roughly stationary. As an example we model the propagation of those high-energy (E greater than or similar to 10 MeV) solar energetic particles in gradual events that are accelerated by large coronal mass ejection shocks in the corona and released near the Sun into interplanetary space of a Parker spiral magnetic field. Modeled with different scenarios, the source of solar energetic particles can have a full or various limited coverages of latitude and longitude on the solar surface. We compute the long-term time profiles of particle flux and anisotropy at various locations in the heliosphere up to 3 AU, from the ecliptic to high latitudes. Features from particle perpendicular diffusion are revealed. Our simulation reproduces the observed reservoir phenomenon of solar energetic particles with constraints on either solar particle source or the magnitude of perpendicular diffusion.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/977
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
Zhang, M.,Qin, G.,Rassoul, H.,et al. PROPAGATION OF SOLAR ENERGETIC PARTICLES IN THREE-DIMENSIONAL INTERPLANETARY MAGNETIC FIELDS[J]. Astrophysical Journal,2009,692(1):109-132.
APA Zhang, M.,Qin, G.,Rassoul, H.,&北京8701信箱.(2009).PROPAGATION OF SOLAR ENERGETIC PARTICLES IN THREE-DIMENSIONAL INTERPLANETARY MAGNETIC FIELDS.Astrophysical Journal,692(1),109-132.
MLA Zhang, M.,et al."PROPAGATION OF SOLAR ENERGETIC PARTICLES IN THREE-DIMENSIONAL INTERPLANETARY MAGNETIC FIELDS".Astrophysical Journal 692.1(2009):109-132.
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