Indication of nearby source signatures of cosmic rays from energy spectra and anisotropies
文献类型：期刊论文
| 作者 | Liu, Wei4; Guo, Yi-Qing4; Yuan, Qiang1,2,3 |
| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2019-10-01 |
| 期号 | 10页码:13 |
| 关键词 | cosmic ray theory cosmic ray experiments particle acceleration |
| ISSN号 | 1475-7516 |
| DOI | 10.1088/1475-7516/2019/10/010 |
| 通讯作者 | Guo, Yi-Qing(guoyq@ihep.ac.cn) ; Yuan, Qiang(yuanq@pmo.ac.cn) |
| 英文摘要 | The 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. |
| WOS关键词 | ELEMENTAL GROUPS ; ACCELERATION ; PROPAGATION |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000503489200010 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/35372]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Guo, Yi-Qing; Yuan, Qiang |
| 作者单位 | 1.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China 2.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China 3.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China 4.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China |
| 推荐引用方式 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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来源：紫金山天文台
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