| The upstream magnetic field of collisionless GRB shocks: constraint by Fermi-LAT observations | |
Li, Z1,2; Zhao XH(赵晓红)3,4 ; Li, Z (reprint author), Peking Univ, Dept Astron, Beijing 100871, Peoples R China.
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| 发表期刊 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
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| 2011-05 | |
| 期号 | 5 |
| DOI | 10.1088/1475-7516/2011/05/008 |
| 产权排序 | 第3完成单位 |
| 收录类别 | SCI |
| 关键词 | Magnetic Fields Particle Acceleration Cosmic Ray Theory Gamma Ray Bursts Theory |
| 摘要 | Long-lived > 100 MeV emission has been a common feature of most Fe detected gamma-ray bursts (GRBs), e.g., detected up to similar to 10(3)s in long GRBs 080916C and 090902B and similar to 10(2)s in short GRB 090510. This emission is consistent with being produced by synchrotron emission of electrons accelerated to high energy by the relativistic collisionless shock propagating, into the weakly magnetized medium. Here we show that this high-energy all emission constrains the preshock magnetic field to satisfy 10(0)n(0)(9/8) mG < B-u < 10(2)n(0)(3/8) mG, where no is the preshock density in unit of 1 cm(-3), more stringent than the previous constraint by X-ray afterglow observations on day scale. This suggests that the preshock magnetic field is strongly amplified, most likely by the streaming of high energy shock accelerated particles. |
| 项目资助者 | National Natural Science Foundation of China [10843007] ; Foundation for the Authors of National Excellent Doctoral Dissertations of China ; West Light Foundation of the Chinese Academy of Sciences |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics ; Physics |
| 文章类型 | Article |
| ISSN | 1475-7516 |
| URL | 查看原文 |
| WOS记录号 | WOS:000291264100008 |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 关键词[WOS] | GAMMA-RAY BURSTS ; HIGH-ENERGY EMISSION ; COSMOLOGICAL FIREBALL MODEL ; RESIDUAL COLLISIONS ; RELATIVISTIC SHOCKS ; AFTERGLOW ; ACCELERATION ; 080916C ; PROMPT ; WAVES |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5409 |
| 专题 | 南方基地 中国科学院天体结构与演化重点实验室 |
| 通讯作者 | Li, Z (reprint author), Peking Univ, Dept Astron, Beijing 100871, Peoples R China. |
| 作者单位 | 1.Department of Astronomy, Peking University, Beijing 100871, China 2.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China 3.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China 4.Key Laboratory for the Structure and Evolution of Celestial Bodies, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China |
| 推荐引用方式 GB/T 7714 | Li, Z,Zhao XH,Li, Z . The upstream magnetic field of collisionless GRB shocks: constraint by Fermi-LAT observations[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2011(5). |
| APA | Li, Z,Zhao XH,&Li, Z .(2011).The upstream magnetic field of collisionless GRB shocks: constraint by Fermi-LAT observations.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(5). |
| MLA | Li, Z,et al."The upstream magnetic field of collisionless GRB shocks: constraint by Fermi-LAT observations".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .5(2011). |
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| The upstream magneti（273KB） | 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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