Probing local cosmic rays using Fermi-LAT observations of a mid-latitude region in the third Galactic quadrant
文献类型：期刊论文
| 作者 | Shen, Zhao-Qiang1,2; Huang, Xiaoyuan1; Yuan, Qiang1,3 ; Fan, Yi-Zhong1,3; Wei, Da-Ming1,3
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| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2019-06-03 |
| 卷号 | 99期号:12页码:10 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/PhysRevD.99.123001 |
| 通讯作者 | Fan, Yi-Zhong(yzfan@pmo.ac.cn) ; Wei, Da-Ming(dmwei@pmo.ac.cn) |
| 英文摘要 | The gamma-ray observation of interstellar gas provides a unique way to probe the cosmic rays (CRs) outside the solar system. In this work, we use an updated version of Fermi-LAT data and recent multi-wavelength tracers of interstellar gas to reanalyze a mid-latitude region in the third Galactic quadrant and estimate the local CR proton spectrum. Two gamma-ray production cross section models for pp interaction, the commonly used one from Kamae et al. (2006) and the up-to-date one from Kafexhiu et al. (2014), are adopted separately in the analysis. Both of them can well fit the emissivity and the derived proton spectra roughly resemble the direct measurements from AMS-02 and Voyager 1, but rather different spectral parameters are indicated. A break at 4 +/- 1 GeV c(-1) is shown if the cross section model by Kamae et al. (2006) is adopted. The resulting spectrum is less than or similar to 20% larger than the AMS-02 observation above 15 GeV and consistent with the demodulated spectrum within 2%. The proton spectrum based on the cross section model of Kafexhiu et al. (2014) is about 1.4-1.8 times that of AMS-02 at 2-100 GeV, however the difference decreases to 20% below 10 GeV with respect to the de-modulated spectrum. A spectral break at 20 +/- 11 GeV c(-1) is required in this model. An extrapolation down to 300 MeV is performed to compare with the observation of Voyager I, and we find a deviation of less than or similar to 2.5 sigma for both the models. In general, an approximately consistent CR spectrum can be obtained using gamma-ray observation nowadays, but we still need a better gamma-ray production cross section model to derive the parameters accurately. |
| WOS关键词 | GAMMA-RAYS ; MOLECULAR CLOUDS ; EMISSION ; GAS ; CEPHEUS ; DUST |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000470868300002 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/27026]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Fan, Yi-Zhong; Wei, Da-Ming |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100012, 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 | Shen, Zhao-Qiang,Huang, Xiaoyuan,Yuan, Qiang,et al. Probing local cosmic rays using Fermi-LAT observations of a mid-latitude region in the third Galactic quadrant[J]. PHYSICAL REVIEW D,2019,99(12):10. |
| APA | Shen, Zhao-Qiang,Huang, Xiaoyuan,Yuan, Qiang,Fan, Yi-Zhong,&Wei, Da-Ming.(2019).Probing local cosmic rays using Fermi-LAT observations of a mid-latitude region in the third Galactic quadrant.PHYSICAL REVIEW D,99(12),10. |
| MLA | Shen, Zhao-Qiang,et al."Probing local cosmic rays using Fermi-LAT observations of a mid-latitude region in the third Galactic quadrant".PHYSICAL REVIEW D 99.12(2019):10. |
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