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Indication of nearby source signatures of cosmic rays from energy spectra and anisotropies
Liu, Wei1; Guo, Yi-Qing1; Yuan, Qiang2,3,4
2019-10-01
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN1475-7516
Issue10Pages:13
Corresponding AuthorGuo, Yi-Qing(guoyq@ihep.ac.cn) ; Yuan, Qiang(yuanq@pmo.ac.cn)
AbstractThe origin of Galactic cosmic rays (GCRs) remains a mystery after more than one century of their discovery. The diffusive propagation of charged particles in the turbulent Galactic magnetic field makes us unable to trace back to their acceleration sites. Nevertheless, nearby GCR source(s) may leave imprints on the locally measured energy spectra and the anisotropies of the arrival direction. In this work we propose a simple but natural description of the GCR production and propagation, within a two-zone disk-halo diffusion scenario together with a nearby source, to understand the up-to-date precise measurements of the energy spectra and anisotropies of GCRs. We find that a common energy scale of similar to 100 TeV appears in both energy spectra of protons and helium nuclei measured recently by CREAM and large-scale anisotropies detected by various experiments. These results indicate that one or more local sources are very likely important contributors to GCRs below 100 TeV. This study provides a probe to identify source(s) of GCRs by means of joint efforts of spectral and anisotropy measurements.
Keywordcosmic ray theory cosmic ray experiments particle acceleration
DOI10.1088/1475-7516/2019/10/010
WOS KeywordELEMENTAL GROUPS ; ACCELERATION ; PROPAGATION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000503489200010
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/35373
Collection中国科学院紫金山天文台
Corresponding AuthorGuo, Yi-Qing; Yuan, Qiang
Affiliation1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
3.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
4.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Liu, Wei,Guo, Yi-Qing,Yuan, Qiang. Indication of nearby source signatures of cosmic rays from energy spectra and anisotropies[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2019(10):13.
APA Liu, Wei,Guo, Yi-Qing,&Yuan, Qiang.(2019).Indication of nearby source signatures of cosmic rays from energy spectra and anisotropies.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(10),13.
MLA Liu, Wei,et al."Indication of nearby source signatures of cosmic rays from energy spectra and anisotropies".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .10(2019):13.
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