THE ORIGIN OF THE PLATEAU AND LATE REBRIGHTENING IN THE AFTERGLOW OF GRB 120326A
文献类型：期刊论文
| 作者 | Hou, S. J.1,2,3; Geng, J. J.4; Wang, K.4; Wu, X. F.3; Huang, Y. F.4; Dai, Z. G.4; Lu, J. F.1,2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2014-04-20 |
| 卷号 | 785期号:2页码:0 |
| 关键词 | gamma-ray burst: individual (GRB 120326A) ISM: jets and outflows radiation mechanisms: non-thermal stars: neutron |
| ISSN号 | 0004-637X |
| 英文摘要 | GRB 120326A is an unusual gamma-ray burst (GRB) that has a long plateau and a very late rebrightening in both X-ray and optical bands. The similar behavior of the optical and X-ray light curves suggests that they may share a common origin. The long plateau starts at several hundred seconds and ends at tens of thousands of seconds, and the peak time of the late rebrightening is about 30,000 s. We analyze the energy injection model by means of numerical and analytical solutions, considering both the wind environment and the interstellarmedium environment for GRB afterglows. We particularly study the influence of the injection starting time, ending time, stellar wind density (or density of the circumburst environment), and injection luminosity on the shape of the afterglow light curves, respectively. In the wind model, we find that the light curve is largely affected by the parameters and that there is a "bump" in the late stage. In the wind environment, we found that the longer the energy is injected, the more obvious the rebrightening will be. We also find that the peak time of the bump is determined by the stellar wind density. We use the late continuous injection model to interpret the unusual afterglow of GRB 120326A. The model fits the observational data well; however, we find that the timescale of the injection must be higher than 10,000 s, which implies that the timescale of the central engine activity must also be more than 10,000 s. This information can give useful constraints on the central engines of GRBs-we consider a newborn millisecond pulsar with a strong magnetic field to be the central engine. On the other hand, our results suggest that the circumburst environment of GRB 120326A is very likely a stellar wind. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | GAMMA-RAY BURSTS ; SWIFT XRT DATA ; CONTINUOUS ENERGY INJECTION ; X-RAY ; LIGHT CURVES ; COMPREHENSIVE ANALYSIS ; FIREBALL MODEL ; SHALLOW-DECAY ; RELATIVISTIC FIREBALLS ; MILLISECOND PULSARS |
| 收录类别 | SCI |
| 原文出处 | 10.1088/0004-637X/785/2/113 |
| 语种 | 英语 |
| WOS记录号 | WOS:000335736800032 |
| 公开日期 | 2014-11-20 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/10611]  |
| 专题 | 紫金山天文台_南极天文中心 |
| 作者单位 | 1.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China 2.Xiamen Univ, Inst Theoret Phys & Astrophys, Xiamen 361005, Fujian, Peoples R China 3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 4.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hou, S. J.,Geng, J. J.,Wang, K.,et al. THE ORIGIN OF THE PLATEAU AND LATE REBRIGHTENING IN THE AFTERGLOW OF GRB 120326A[J]. ASTROPHYSICAL JOURNAL,2014,785(2):0. |
| APA | Hou, S. J..,Geng, J. J..,Wang, K..,Wu, X. F..,Huang, Y. F..,...&Lu, J. F..(2014).THE ORIGIN OF THE PLATEAU AND LATE REBRIGHTENING IN THE AFTERGLOW OF GRB 120326A.ASTROPHYSICAL JOURNAL,785(2),0. |
| MLA | Hou, S. J.,et al."THE ORIGIN OF THE PLATEAU AND LATE REBRIGHTENING IN THE AFTERGLOW OF GRB 120326A".ASTROPHYSICAL JOURNAL 785.2(2014):0. |
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来源：紫金山天文台
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