High-energy afterglow emission from giant flares of soft gamma-ray repeaters: the case of the 2004 December 27 event from SGR 1806-20
文献类型：期刊论文
| 作者 | Fan, YZ ; Zhang, B; Wei, DM
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2005-08-11 |
| 卷号 | 361期号:3页码:965-970 |
| 关键词 | acceleration of particles elementary particles hydrodynamics stars : neutron stars : winds outflows gamma-rays : bursts |
| ISSN号 | 0035-8711 |
| 英文摘要 | We discuss the high-energy afterglow emission (including high-energy photons, neutrinos and cosmic rays) following the 2004 December 27 giant flare from the soft gamma-ray repeater (SGR) 1806-20. If the initial outflow is relativistic with a bulk Lorentz factor Gamma(0) similar to tens, the high-energy tail of the synchrotron emission from electrons in the forward shock region gives rise to a prominent sub-GeV emission, if the electron spectrum is hard enough and if the initial Lorentz factor is high enough. This signal could serve as a diagnosis of the initial Lorentz factor of the giant flare outflow. This component is potentially detectable by the Gamma-Ray Large Area Telescope (GLAST) if a similar giant flare occurs in the GLAST era. With the available 10-MeV data, we constrain that Gamma(0) < 50 if the electron distribution is a single power law. For a broken power-law distribution of electrons, a higher Gamma(0) is allowed. At energies higher than I GeV, the flux is lower because of a high-energy cut-off of the synchrotron emission component. The synchrotron self-Compton emission component and the inverse Compton scattering component off the photons in the giant flare oscillation tail are also considered, but they are found not significant given a moderate Gamma(0) (e.g. < 10). The forward shock also accelerates cosmic rays to the maximum energy 10(17) eV, and generates neutrinos with a typical energy 10(14) eV through photomeson interaction with the X-ray tail photons. However, they are too weak to be detectable. |
| 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] | BURST AFTERGLOWS ; MAGNETAR SGR-1806-20 ; MECHANISM |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000231418300021 |
| 公开日期 | 2012-03-07 |
| 源URL | [http://159.226.72.40/handle/332002/4182]  |
| 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.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA |
| 推荐引用方式 GB/T 7714 | Fan, YZ,Zhang, B,Wei, DM. High-energy afterglow emission from giant flares of soft gamma-ray repeaters: the case of the 2004 December 27 event from SGR 1806-20[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2005,361(3):965-970. |
| APA | Fan, YZ,Zhang, B,&Wei, DM.(2005).High-energy afterglow emission from giant flares of soft gamma-ray repeaters: the case of the 2004 December 27 event from SGR 1806-20.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,361(3),965-970. |
| MLA | Fan, YZ,et al."High-energy afterglow emission from giant flares of soft gamma-ray repeaters: the case of the 2004 December 27 event from SGR 1806-20".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 361.3(2005):965-970. |
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来源：紫金山天文台
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