Understanding the spectral hardenings and radial distribution of galactic cosmic rays and fermi diffuse gamma rays with spatially-dependent propagation
文献类型：期刊论文
| 作者 | Guo, Yi-Qing1; Yuan, Qiang2,3 |
| 刊名 | Physical review d
 |
| 出版日期 | 2018-03-13 |
| 卷号 | 97期号:6页码:8 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/physrevd.97.063008 |
| 通讯作者 | Yuan, qiang(yuanq@pmo.ac.cn) |
| 英文摘要 | Recent direct measurements of galactic cosmic ray spectra by balloon/space-borne detectors reveal spectral hardenings of all major nucleus species at rigidities of a few hundred gv. the all-sky diffuse gamma-ray emissions measured by the fermi large area telescope also show spatial variations of the intensities and spectral indices of cosmic rays. these new observations challenge the traditional simple acceleration and/or propagation scenario of galactic cosmic rays. in this work, we propose a spatially dependent diffusion scenario to explain all these phenomena. the diffusion coefficient is assumed to be anticorrelated with the source distribution, which is a natural expectation from the charged particle transportation in a turbulent magnetic field. the spatially dependent diffusion model also gives a lower level of anisotropies of cosmic rays, which are consistent with observations by underground muons and air shower experiments. the spectral variations of cosmic rays across the galaxy can be properly reproduced by this model. |
| WOS关键词 | SUPERNOVA-REMNANTS ; INTERSTELLAR-MEDIUM ; HELIUM SPECTRA ; ANISOTROPY ; TEV ; REACCELERATION ; ORIGIN ; PROTON ; GALAXY |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000427315600004 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2178058 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Yuan, Qiang |
| 作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 3.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Yi-Qing,Yuan, Qiang. Understanding the spectral hardenings and radial distribution of galactic cosmic rays and fermi diffuse gamma rays with spatially-dependent propagation[J]. Physical review d,2018,97(6):8. |
| APA | Guo, Yi-Qing,&Yuan, Qiang.(2018).Understanding the spectral hardenings and radial distribution of galactic cosmic rays and fermi diffuse gamma rays with spatially-dependent propagation.Physical review d,97(6),8. |
| MLA | Guo, Yi-Qing,et al."Understanding the spectral hardenings and radial distribution of galactic cosmic rays and fermi diffuse gamma rays with spatially-dependent propagation".Physical review d 97.6(2018):8. |
入库方式： iSwitch采集
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。