| Nonthermal radiation from pulsar wind nebulae | |
Zhang L(张力)1,2 ; Chen, SB1; Fang, J1; Zhang, L (reprint author), Yunnan Univ, Dept Phys, Kunming 650091, Yunnan, Peoples R China.
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| 发表期刊 | ASTROPHYSICAL JOURNAL
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| 2008-04-01 | |
| 卷号 | 676期号:2页码:1210-1217 |
| DOI | 10.1086/527466 |
| 产权排序 | 第2完成单位 |
| 收录类别 | SCI |
| 关键词 | Gamma Rays : Theory Ism : Individual (Crab Nebula Msh 15-52 Hess J1825-137) |
| 摘要 | We study the nonthermal emission of pulsar wind nebulae (PWNe) from radio to TeV gamma-ray energies with a simplified time-dependent injection model. In this model, a relativistic wind of particles driven by a central pulsar with a spin-down power L(t) is blown into the ambient medium and a shock wave is formed, which accelerates the particles to very high energies through the Fermi acceleration mechanism in the PWN. The relativistic particles in the PWN therefore consist of two components, one coming directly from the pulsar magnetosphere and the other from shock acceleration in the PWN. The model PWN spectra follow a broken power law with different indices and a break energy E-b. The accelerated particles produce nonthermal photons through synchrotron radiation and inverse Compton scattering off soft photon fields. We apply this model to the Crab Nebula, the PWN in MSH 15 - 52, and HESS J1825 - 137, which have all been found to emit very high energy (VHE) photons. Our results indicate that ( 1) the observed data, ranging from radio to VHE gamma-rays, for the Crab Nebula can be reproduced by this model, where the emission from radio to medium-energy gamma-rays is from the synchrotron emission due to the injected electrons, whereas the high-energy photons primarily come from inverse Compton scattering of the high-energy electrons on synchrotron photons; and ( 2) the TeV emission from the PWN in MSH 15 - 52 and HESS J1825 - 137 mainly comes from the inverse Compton scattering of the high-energy electrons on infrared photons. |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0004-637X |
| URL | 查看原文 |
| WOS记录号 | WOS:000254530600037 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | ENERGY GAMMA-RAYS ; CRAB-NEBULA ; X-RAY ; SUPERNOVA REMNANT ; NEUTRON-STARS ; PSR B1823-13 ; MSH 15-52 ; VELA-X ; TEV ; SYNCHROTRON |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4225 |
| 专题 | 其他 |
| 通讯作者 | Zhang, L (reprint author), Yunnan Univ, Dept Phys, Kunming 650091, Yunnan, Peoples R China. |
| 作者单位 | 1.Department of Physics, Yunnan University, Kunming, 650091 Yunnan, China 2.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming, 650011 Yunnan, China |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Zhang L,Chen, SB,Fang, J,et al. Nonthermal radiation from pulsar wind nebulae[J]. ASTROPHYSICAL JOURNAL,2008,676(2):1210-1217. |
| APA | Zhang L,Chen, SB,Fang, J,&Zhang, L .(2008).Nonthermal radiation from pulsar wind nebulae.ASTROPHYSICAL JOURNAL,676(2),1210-1217. |
| MLA | Zhang L,et al."Nonthermal radiation from pulsar wind nebulae".ASTROPHYSICAL JOURNAL 676.2(2008):1210-1217. |
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| Nonthermal Radiation（321KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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