DISCOVERY OF AN EXTRA HARD SPECTRAL COMPONENT IN THE HIGH-ENERGY AFTERGLOW EMISSION OF GRB 130427A
文献类型：期刊论文
| 作者 | Tam, Pak-Hin Thomas1,2; Tang, Qing-Wen3,4; Hou, Shu-Jin5,6,7; Liu, Ruo-Yu3,4,8; Wang, Xiang-Yu3,4 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2013-07-01 |
| 卷号 | 771期号:1页码:5PP |
| 关键词 | gamma-ray burst: individual (GRB 130427A) radiation mechanisms: non-thermal |
| ISSN号 | 2041-8205 |
| 通讯作者 | Tam, PHT (reprint author), Natl Tsing Hua Univ, Inst Astron, Hsinchu 30013, Taiwan. Email: phtam@phys.nthu.edu.tw ; xywang@nju.edu.cn |
| 英文摘要 | The extended high-energy gamma-ray (> 100 MeV) emission which occurs after prompt gamma-ray bursts (GRBs) is usually characterized by a single power-law spectrum, which has been explained as the afterglow synchrotron radiation. The afterglow inverse Compton emission has long been predicted to be able to produce a high-energy component as well, but previous observations have not clearly revealed such a signature, probably due to the small number of > 10 GeV photons even for the brightest GRBs known so far. In this Letter, we report on the Fermi Large Area Telescope observations of the > 100 MeV emission from the very bright and nearby GRB130427A. We characterize the time-resolved spectra of the GeV emission from the GRB onset to the afterglow phase. By performing time-resolved spectral fits of GRB130427A, we found strong evidence of an extra hard spectral component that exists in the extended high-energy emission of this GRB. We argue that this hard component may arise from the afterglow inverse Compton emission. |
| 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] | GAMMA-RAY BURSTS ; LARGE-AREA TELESCOPE ; FERMI ; ACCELERATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000320811300013 |
| 公开日期 | 2014-01-08 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/9765]  |
| 专题 | 紫金山天文台_暗物质和空间天文实验室 |
| 作者单位 | 1.Natl Tsing Hua Univ, Inst Astron, Hsinchu 30013, Taiwan 2.Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan 3.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China 4.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China 5.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China 6.Xiamen Univ, Inst Theoret Phys & Astrophys, Xiamen 361005, Fujian, Peoples R China 7.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 8.Max Planck Inst Kernphys, D-69117 Heidelberg, Germany |
| 推荐引用方式 GB/T 7714 | Tam, Pak-Hin Thomas,Tang, Qing-Wen,Hou, Shu-Jin,et al. DISCOVERY OF AN EXTRA HARD SPECTRAL COMPONENT IN THE HIGH-ENERGY AFTERGLOW EMISSION OF GRB 130427A[J]. ASTROPHYSICAL JOURNAL LETTERS,2013,771(1):5PP. |
| APA | Tam, Pak-Hin Thomas,Tang, Qing-Wen,Hou, Shu-Jin,Liu, Ruo-Yu,&Wang, Xiang-Yu.(2013).DISCOVERY OF AN EXTRA HARD SPECTRAL COMPONENT IN THE HIGH-ENERGY AFTERGLOW EMISSION OF GRB 130427A.ASTROPHYSICAL JOURNAL LETTERS,771(1),5PP. |
| MLA | Tam, Pak-Hin Thomas,et al."DISCOVERY OF AN EXTRA HARD SPECTRAL COMPONENT IN THE HIGH-ENERGY AFTERGLOW EMISSION OF GRB 130427A".ASTROPHYSICAL JOURNAL LETTERS 771.1(2013):5PP. |
入库方式： OAI收割
来源：紫金山天文台
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