Hadronic versus Leptonic Models for γ-Ray Emission from VER J2227+608
文献类型：期刊论文
| 作者 | Liu,Siming1,3; Zeng,Houdun1,3; Xin,Yuliang1,3; Zhu,Hui2 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2020-07-01 |
| 卷号 | 897期号:2 |
| 关键词 | Galactic cosmic rays Gamma-ray sources Non-thermal radiation sources Gamma-ray astronomy Extended radiation sources Supernova remnants Diffuse nebulae Rotation powered pulsars Cosmic ray sources Cosmic ray astronomy Astrophysical processes Ultra-high-energy cosmic radiation |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/ab9ff2 |
| 英文摘要 | Abstract Recent observations of VER J2227+608 reveal a broken power γ-ray spectrum with the spectral index increasing from ～1.8 in the GeV energy range to ～2.3 in the TeV range. Such a spectral break can be attributed to radiative energy loss of energetic electrons in the leptonic scenario for the γ-ray emission, which, in combination with the characteristic age of the nearby pulsar, can be used to constrain the magnetic field in the emission region. We show that the radio and X-ray observations can also be explained in such a scenario. In the hadronic scenario, the spectral break can be attributed to diffusion of energetic ions in a turbulent medium and detailed spectral measurement can be used to constrain the diffusion coefficient. These two models, however, predict drastically different spectra above 100 TeV, which will be uncovered with future high-resolution observations, such as Large High Altitude Air Shower Observatory (LHAASO) and/or Cherenkov Telescope Array (CTA). |
| 语种 | 英语 |
| WOS记录号 | IOP:2041-8205-897-2-AB9FF2 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/63363]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, People's Republic of China; liusm@pmo.ac.cn, zhd@pmo.ac.cn 2.National Astronomical Observatories, Chinese Academy of Sciences, CAS, Jia-20 Datun Road, Chaoyang District, 100012 Beijing, People’s Republic of China 3.School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Liu,Siming,Zeng,Houdun,Xin,Yuliang,et al. Hadronic versus Leptonic Models for γ-Ray Emission from VER J2227+608[J]. The Astrophysical Journal Letters,2020,897(2). |
| APA | Liu,Siming,Zeng,Houdun,Xin,Yuliang,&Zhu,Hui.(2020).Hadronic versus Leptonic Models for γ-Ray Emission from VER J2227+608.The Astrophysical Journal Letters,897(2). |
| MLA | Liu,Siming,et al."Hadronic versus Leptonic Models for γ-Ray Emission from VER J2227+608".The Astrophysical Journal Letters 897.2(2020). |
入库方式： OAI收割
来源：国家天文台
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