Astrophysical Background and Dark Matter Implication Based on Latest AMS-02 Data
文献类型：期刊论文
| 作者 | Jin,Hong-Bo1,2; Wu,Yue-Liang2,3,4; Zhou,Yu-Feng2,3 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-09-01 |
| 卷号 | 901期号:1 |
| 关键词 | Galactic cosmic rays Dark matter |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/abb01a |
| 英文摘要 | Abstract The cosmic-ray (CR) positrons and antiprotons are often regarded as the collision products of CR nucleons with the interstellar medium. However, the predicted fluxes of CR positrons and antiprotons by the conventional models are not consistent with the experimental data from PAMELA, Fermi-LAT, AMS-02, etc. In this work, we choose the latest AMS-02 data to analyze the astrophysical background of CR positrons and antiprotons. QGSJET-II-04 is chosen as the hadronic interaction model. The GALPROP package is used to solve the propagation equation numerically. The results show that the predicted flux of CR positrons at low energies is consistent with AMS-02 data in the reacceleration and convection–diffusion (DCR) model. In the DCR model and the hadronic interaction model, QGSJET-II-04, the excess of CR antiprotons at low energies is excluded. The dark matter interpretation of the positron excess is analyzed with the total fluxes of CR electrons and positrons from AMS-02. The predicted best-fit mass of dark matter ranges from 400 GeV to 4 TeV. Moreover, in the above models the predicted flux of CR protons is completely consistent with AMS-02 data, which matches the hardening feature above 330 GeV. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-901-1-ABB01A |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/61904]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Jin,Hong-Bo |
| 作者单位 | 1.National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, People’s Republic of China 2.CAS Key Laboratory of Theoretical Physics, Chinese Academy of Sciences, People’s Republic of China; hbjin@bao.ac.cn, hbjin@itp.ac.cn 3.Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China 4.University of Chinese Academy of Sciences, Beijing 100190, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Jin,Hong-Bo,Wu,Yue-Liang,Zhou,Yu-Feng. Astrophysical Background and Dark Matter Implication Based on Latest AMS-02 Data[J]. The Astrophysical Journal,2020,901(1). |
| APA | Jin,Hong-Bo,Wu,Yue-Liang,&Zhou,Yu-Feng.(2020).Astrophysical Background and Dark Matter Implication Based on Latest AMS-02 Data.The Astrophysical Journal,901(1). |
| MLA | Jin,Hong-Bo,et al."Astrophysical Background and Dark Matter Implication Based on Latest AMS-02 Data".The Astrophysical Journal 901.1(2020). |
入库方式： OAI收割
来源：国家天文台
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