Cosmic ray protons in the energy range 10(16)-10(18.5) eV: stochastic gyroresonant acceleration in hypernova shocks?
文献类型：期刊论文
| 作者 | Fan, Yi-Zhong1,2
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2008-09-21 |
| 卷号 | 389期号:3页码:1306-1310 |
| 关键词 | acceleration of particles supernovae : general cosmic rays supernova remnants gamma-rays : bursts |
| ISSN号 | 0038-0938 |
| 英文摘要 | The hypernovae (HNe) associated with gamma-ray bursts (GRBs) may have a fairly steep energy-velocity distribution, i.e. E(>=beta) proportional to beta(-q) for q < 2 and beta >= beta(o), where beta is the velocity of the material and beta(o) similar to 0.1 is the velocity of the slowest ejecta of the HN explosion, both in units of the speed of light (c). The cosmic ray protons above the second knee but below the ankle may be accelerated by the HN shocks in the velocity range of beta similar to beta(o)-4 beta(o). When beta <= 4 beta(o), the radius of the shock front to the central engine is very large and the medium decelerating the HN outflow is very likely to be homogeneous. With this argument, we show that for q similar to 1.7, as inferred from the optical modelling of SN 2003lw, the stochastic gyroresonant acceleration model can account for the spectrum change of high-energy protons around the second knee. The self-magnetized shock acceleration model, however, yields too steep a spectrum which is inconsistent with the observation unless the medium surrounding the HN is a free wind holding up to a radius similar to 1-10 kpc. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SUPERNOVA-REMNANTS ; BURST PROGENITORS ; BLAST WAVES ; GRB-030329 ; GRB-031203 ; GRB-980425 ; EMISSION ; SPECTRUM |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000259087500027 |
| 公开日期 | 2011-12-30 |
| 源URL | [http://159.226.72.40/handle/332002/1951]  |
| 专题 | 紫金山天文台_宇宙伽马暴、中子星及相关物理研究团组 |
| 作者单位 | 1.Univ Copenhagen, Niels Bohr Int Acad, Niels Bohr Inst, DK-2100 Copenhagen, Denmark 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Yi-Zhong. Cosmic ray protons in the energy range 10(16)-10(18.5) eV: stochastic gyroresonant acceleration in hypernova shocks?[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2008,389(3):1306-1310. |
| APA | Fan, Yi-Zhong.(2008).Cosmic ray protons in the energy range 10(16)-10(18.5) eV: stochastic gyroresonant acceleration in hypernova shocks?.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,389(3),1306-1310. |
| MLA | Fan, Yi-Zhong."Cosmic ray protons in the energy range 10(16)-10(18.5) eV: stochastic gyroresonant acceleration in hypernova shocks?".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 389.3(2008):1306-1310. |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
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。