| Full electromagnetic cascades in spin-powered pulsars | |
Fang, J1; Zhang L(张力)1,2 ; Fang, J (reprint author), Yunnan Univ, Dept Phys, Kunming 650031, Peoples R China.
| |
| 发表期刊 | ASTROPHYSICAL JOURNAL
 |
| 2006-12-10 | |
| 卷号 | 653期号:1页码:573-579 |
| DOI | 10.1086/508563 |
| 产权排序 | 第2完成单位 |
| 收录类别 | SCI |
| 关键词 | Pulsars : General Radiation Mechanisms : Nonthermal |
| 摘要 | We simulate the full pair-photon cascade initiated by a single primary electron above the stellar surface of a normal spin-down-powered pulsar, using the Monte Carlo method. For a primary electron with a specified initial energy moving along a given field line, a cascade is initiated at the lower pair formation front. This cascade involves curvature radiation from the primary electron, conversion of photons emitted by the primary and secondary particles to electron-positron pairs, and subsequent quantum synchrotron radiation and inverse Compton scattering by the secondary pairs. Finally, high-energy photon and pair spectra are calculated. In our simulation, the space charge limited flow model is incorporated, in which the acceleration gap is high above the stellar surface (about several stellar radii). However, we do not consider the exact acceleration in the gap; we just give the initial energy of the electron at the pair formation front and then trace the primary and secondary particles and photons emitted during the journey of those particles in the magnetosphere. Based on a two-dimensional picture and ignoring rotational effects, we calculate the resulting spectra for different pulsar parameters and find that the inverse Compton scattering component of the pairs can contribute significantly to the final spectrum below several MeV for a normal pulsar. |
| 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:000242913800047 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | GAMMA-RAY PULSARS ; STRONG MAGNETIC-FIELDS ; POLAR-CAP MODELS ; ENERGETIC RADIATION ; CURVATURE-RADIATION ; PAIR FORMATION ; OUTER GAPS ; EMISSION ; SPECTRA ; ELECTRODYNAMICS |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4193 |
| 专题 | 其他 |
| 通讯作者 | Fang, J (reprint author), Yunnan Univ, Dept Phys, Kunming 650031, Peoples R China. |
| 作者单位 | 1.Department of Physics, Yunnan University, 650031 Kunming, China 2.Yunnan Astronomical Observatory, National Astronomical Observatories, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China |
| 推荐引用方式 GB/T 7714 | Fang, J,Zhang L,Fang, J . Full electromagnetic cascades in spin-powered pulsars[J]. ASTROPHYSICAL JOURNAL,2006,653(1):573-579. |
| APA | Fang, J,Zhang L,&Fang, J .(2006).Full electromagnetic cascades in spin-powered pulsars.ASTROPHYSICAL JOURNAL,653(1),573-579. |
| MLA | Fang, J,et al."Full electromagnetic cascades in spin-powered pulsars".ASTROPHYSICAL JOURNAL 653.1(2006):573-579. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Full Electromagnetic（302KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论