| Non-thermal emission from old supernova remnants | |
Fang, J1; Zhang L(张力)1,2 ; Fang, J (reprint author), Yunnan Univ, Dept Phys, Kunming 650091, Peoples R China.
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| 发表期刊 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 2008-03-01 | |
| 卷号 | 384期号:3页码:1119-1128 |
| DOI | 10.1111/j.1365-2966.2007.12766.x |
| 产权排序 | 第2完成单位 |
| 收录类别 | SCI |
| 关键词 | Radiation Mechanisms : Non-thermal Ism : Individual G8.7-01 Ism : Individual G23.3-03 Supernova Remnants Gamma-rays : Theory |
| 摘要 | We study the non-thermal emission from old shell-type supernova remnants (SNRs) on the frame of a time-dependent model. In this model, the time-dependent non-thermal spectra of both primary electrons and protons as well as secondary electron/positron (e(+/-)) pairs can be calculated numerically by taking into account the evolution of the secondary e(+/-) pairs produced from proton-proton (p-p) interactions as accelerated protons collide with the ambient matter in an SNR. The multiwavelength photon spectrum for a given SNR can be produced through leptonic processes such as electron/positron synchrotron radiation, bremsstrahlung and inverse Compton scattering as well as hadronic interaction. Our results indicate that the non-thermal emission of the secondary e(+/-) pairs is becoming more and more prominent when the SNR ages in the radiative phase because the source of the primary electrons has been cut off and the electron synchrotron energy loss is significant for a radiative SNR, whereas the secondary e(+/-) pairs can be produced continuously for a long time in the phase due to the large energy-loss time for the p-p interaction. We apply the model to two old SNRs, G8.7-0.1 and G23.3-0.3, and the predicted results can explain the observed multiwavelength photon spectra for the two sources. |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0035-8711 |
| URL | 查看原文 |
| WOS记录号 | WOS:000253760300022 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | GAMMA-RAY EMISSION ; PARTICLE-ACCELERATION ; SHOCK ACCELERATION ; GALACTIC PLANE ; X-RAYS ; HESS ; TEV ; SHELL ; CHANDRA ; RX-J1713.7-3946 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4228 |
| 专题 | 其他 |
| 通讯作者 | Fang, J (reprint author), Yunnan Univ, Dept Phys, Kunming 650091, Peoples R China. |
| 作者单位 | 1.Department of Physics, Yunnan University, Kunming, China 2.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, PO Box 110, Kunming, China |
| 推荐引用方式 GB/T 7714 | Fang, J,Zhang L,Fang, J . Non-thermal emission from old supernova remnants[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2008,384(3):1119-1128. |
| APA | Fang, J,Zhang L,&Fang, J .(2008).Non-thermal emission from old supernova remnants.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,384(3),1119-1128. |
| MLA | Fang, J,et al."Non-thermal emission from old supernova remnants".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 384.3(2008):1119-1128. |
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| Non-thermal emission（807KB） | 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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