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A NUMERICAL SIMULATION OF COSMIC RAY MODULATION NEAR THE HELIOPAUSE. II. SOME PHYSICAL INSIGHTS
Luo, Xi; Potgieter, Marius S.; Zhang, Ming; Pogorelov, Nikolai V.; Feng, Xueshang; Strauss, R. du Toit; Luo, X (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, SIGMA Weather Grp, Beijing 100190, Peoples R China.; Luo, X (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
Department空间科学部
Source PublicationASTROPHYSICAL JOURNAL
2016
Volume826Issue:2Pages:182
ISSN0004-637X
Language英语
KeywordCosmic Rays Sun: Heliosphere
AbstractCosmic ray (CR) transport near the heliopause (HP) is studied using a hybrid transport model, with the parameters constrained by observations from the Voyager 1 spacecraft. We simulate the CR radial flux along different directions in the heliosphere. There is no well-defined thin layer between the solar wind region and the interstellar region along the tail and polar directions of the heliosphere. By analyzing the radial flux curve along the direction of Voyager. 2, together with its trajectory information, the crossing time of the HP by Voyager. 2 is predicted to be in 2017.14. We simulate the CR radial flux for different energy values along the direction of Voyager. 1. We find that there is only a modest modulation region of about 10 au wide beyond the HP, so that Voyager. 1 observing the Local Interstellar Spectra is justified in numerical modeling. We analyze the heliospheric exit information of pseudo-particles in our stochastic numerical (time-backward) method, conjecturing that they represent the behavior of CR particles, and we find that pseudo-particles that have been traced from the nose region exit in the tail region. This implies that many CR particles diffuse directly from the heliospheric tail region to the nose region near the HP. In addition, when pseudo-particles were traced from the Local Interstellar Medium (LISM), it is found that their exit location (entrance for real particles) from the simulation domain is along the prescribed Interstellar Magnetic Field direction. This indicates that parallel diffusion dominates CR particle transport in the LISM.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/5601
Collection空间科学部
Corresponding AuthorLuo, X (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, SIGMA Weather Grp, Beijing 100190, Peoples R China.; Luo, X (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
Recommended Citation
GB/T 7714
Luo, Xi,Potgieter, Marius S.,Zhang, Ming,et al. A NUMERICAL SIMULATION OF COSMIC RAY MODULATION NEAR THE HELIOPAUSE. II. SOME PHYSICAL INSIGHTS[J]. ASTROPHYSICAL JOURNAL,2016,826(2):182.
APA Luo, Xi.,Potgieter, Marius S..,Zhang, Ming.,Pogorelov, Nikolai V..,Feng, Xueshang.,...&Luo, X .(2016).A NUMERICAL SIMULATION OF COSMIC RAY MODULATION NEAR THE HELIOPAUSE. II. SOME PHYSICAL INSIGHTS.ASTROPHYSICAL JOURNAL,826(2),182.
MLA Luo, Xi,et al."A NUMERICAL SIMULATION OF COSMIC RAY MODULATION NEAR THE HELIOPAUSE. II. SOME PHYSICAL INSIGHTS".ASTROPHYSICAL JOURNAL 826.2(2016):182.
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