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Modulation of Galactic Cosmic Rays in the Inner Heliosphere, Comparing with PAMELA Measurements
Qin, G.; Shen, Z. -N.; Qin, G (reprint author), Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China.; Qin, G (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.; Qin, G (reprint author), Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China.
Department空间科学部
Source PublicationASTROPHYSICAL JOURNAL
2017
Volume846Issue:1
ISSN0004-637X
Language英语
KeywordCosmic Rays Sun: Activity Sun: Heliosphere Turbulence
AbstractWe develop a numerical model to study the time-dependent modulation of galactic cosmic rays in the inner heliosphere. In the model, a time-delayed modified Parker heliospheric magnetic field (HMF) and a new diffusion coefficient model, NLGCE-F, from Qin & Zhang, are adopted. In addition, the latitudinal dependence of magnetic turbulence magnitude is assumed to be similar to(1 + sin(2) theta)/2 from the observations of Ulysses, and the radial dependence is assumed to be similar to r(S), where we choose an expression of S as a function of the heliospheric current sheet tilt angle. We show that the analytical expression used to describe the spatial variation of HMF turbulence magnitude agrees well with the Ulysses, Voyager 1, and Voyager 2 observations. By numerically calculating the modulation code, we get the proton energy spectra as a function of time during the recent solar minimum, it is shown that the modulation results are consistent with the Payload for Antimatter-Matter Exploration and Light-nuclei Astrophysics measurements.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6037
Collection空间科学部
Corresponding AuthorQin, G (reprint author), Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China.; Qin, G (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.; Qin, G (reprint author), Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China.
Recommended Citation
GB/T 7714
Qin, G.,Shen, Z. -N.,Qin, G ,et al. Modulation of Galactic Cosmic Rays in the Inner Heliosphere, Comparing with PAMELA Measurements[J]. ASTROPHYSICAL JOURNAL,2017,846(1).
APA Qin, G.,Shen, Z. -N.,Qin, G ,Qin, G ,&Qin, G .(2017).Modulation of Galactic Cosmic Rays in the Inner Heliosphere, Comparing with PAMELA Measurements.ASTROPHYSICAL JOURNAL,846(1).
MLA Qin, G.,et al."Modulation of Galactic Cosmic Rays in the Inner Heliosphere, Comparing with PAMELA Measurements".ASTROPHYSICAL JOURNAL 846.1(2017).
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