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Implications on cosmic ray injection and propagation parameters from Voyager/ACE/AMS-02 nucleus data
Yuan, Qiang1,2,3
2019-04-01
Source PublicationSCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
ISSN1674-7348
Volume62Issue:4Pages:8
Corresponding AuthorYuan, Qiang(yuanq@pmo.ac.cn)
AbstractWe study the propagation and injection models of cosmic rays using the latest measurements of the boron-to-carbon ratio and fluxes of protons, helium, carbon, and oxygen nuclei by the Alpha Magnetic Spectrometer and the Advanced Composition Ex- plorer at top of the Earth, and the Voyager spacecraft outside the heliosphere. The Advanced Composition Explorer (ACE) data during the same time interval of the AMS-02 data are extracted to minimize the complexity of the solar modulation effect. We find that the cosmic ray nucleus data favor a modified version of the diffusion-reacceleration scenario of the propagation. The diffusion coefficient is, however, required to increase moderately with decreasing rigidity at low energies, which has interesting implications on the particle and plasma interaction in the Milky Way. We further find that the low rigidity (< a few GV) injection spectra are different for different compositions. The injection spectra are softer for lighter nuclei. These results are expected to be helpful in understanding the acceleration process of cosmic rays.
Keywordcosmic rays propagation origin and acceleration data analysis
DOI10.1007/s11433-018-9300-0
WOS KeywordENERGY-SPECTRA ; SECONDARY ; GALAXY ; BE-10 ; TURBULENCE ; LIFETIME
Indexed BySCI
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000449794000001
PublisherSCIENCE PRESS
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/20895
Collection中国科学院紫金山天文台
Corresponding AuthorYuan, Qiang
Affiliation1.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
3.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Yuan, Qiang. Implications on cosmic ray injection and propagation parameters from Voyager/ACE/AMS-02 nucleus data[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2019,62(4):8.
APA Yuan, Qiang.(2019).Implications on cosmic ray injection and propagation parameters from Voyager/ACE/AMS-02 nucleus data.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,62(4),8.
MLA Yuan, Qiang."Implications on cosmic ray injection and propagation parameters from Voyager/ACE/AMS-02 nucleus data".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 62.4(2019):8.
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