Constraining the Position of the Knee in the Galactic Cosmic-Ray Spectrum with Ultra-high-energy Diffuse gamma-Rays
文献类型：期刊论文
| 作者 | Zhang, PP; Guo, YQ ; Qiao, BQ; Liu, W
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| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2022 |
| 卷号 | 940期号:1页码:3 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ac98ff |
| 文献子类 | Article |
| 英文摘要 | The diffuse gamma-ray emission was measured up to 957 TeV by the Tibet-AS gamma experiment recently. Assuming that it is produced by the hadronic interaction between cosmic-ray nuclei and the interstellar medium, it requires that the cosmic-ray nuclei should be accelerated well beyond PeV energies. Measurements of the cosmic-ray spectra for different species show diverse results at present. The Tibet experiments showed that the spectrum of proton plus helium has an early knee below PeV. If this is correct, the diffuse gamma-ray emission would suggest an additional component of Galactic cosmic rays above PeV energies. This second component may originate from a source population of so-called PeVatrons revealed by recent ultra-high-energy gamma-ray observations and could contribute to the cosmic-ray fluxes up to the energy of the second knee. On the other hand, the KASCADE measurement showed that the knee of protons is higher than PeV. In this case, the diffuse gamma-rays observed by Tibet-AS gamma can be well accounted for by only one cosmic-ray component. These two scenarios (i.e., the Tibet and KASCADE knees) could be distinguished by the spectral structures of diffuse gamma-rays and cosmic-ray nuclei. Future measurements of spectra of individual nuclei by HERD and LHAASO experiments and diffuse gamma-rays by LHAASO can jointly constrain these two scenarios. |
| 电子版国际标准刊号 | 1538-4357 |
| 语种 | 英语 |
| WOS记录号 | WOS:000885591100001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/299259]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Zhang, PP,Guo, YQ,Qiao, BQ,et al. Constraining the Position of the Knee in the Galactic Cosmic-Ray Spectrum with Ultra-high-energy Diffuse gamma-Rays[J]. ASTROPHYSICAL JOURNAL,2022,940(1):3. |
| APA | Zhang, PP,Guo, YQ,Qiao, BQ,&Liu, W.(2022).Constraining the Position of the Knee in the Galactic Cosmic-Ray Spectrum with Ultra-high-energy Diffuse gamma-Rays.ASTROPHYSICAL JOURNAL,940(1),3. |
| MLA | Zhang, PP,et al."Constraining the Position of the Knee in the Galactic Cosmic-Ray Spectrum with Ultra-high-energy Diffuse gamma-Rays".ASTROPHYSICAL JOURNAL 940.1(2022):3. |
入库方式： OAI收割
来源：高能物理研究所
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