The interpretation and implication of the afterglow of GRB 060218
文献类型：期刊论文
| 作者 | Fan, Yi-Zhong; Piran, Tsvi; Xu, Dong |
| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2006-09-01 |
| 期号 | 9 |
| 关键词 | gamma ray bursts gamma ray burst experiments |
| 英文摘要 | The nearby GRB 060216/SN 2006aj was an extremely long, weak and very soft GRB. It was peculiar in many aspects. We show here that the x-ray, ultraviolet/optical and radio afterglows of GRB 060218 have to be attributed to different physical processes arising from different emission regions. From the several components in this burst's afterglow only the radio afterglow can be interpreted in terms of the common external shock model. We infer from the radio that the blast wave's kinetic energy was similar to 10(50) erg and the circumburst matter had a constant rather than a wind pro. le. The lack of a 'jet break' up to 22 days implies that the outflow was wide, theta(j)> 1. Even though the late x-ray afterglow decays normally, it cannot result from an external shock because of its very steep spectrum. Furthermore, the implied kinetic energy would have produced far too much radio. We suggest that this x-ray afterglow could be attributed to a continued activity of the central engine that within the collapsar scenario could arise from fall-back accretion. 'Central engine afterglow' may be common in under-luminous GRBs where the kinetic energy of the blast wave is small and the external shock does not dominate over this component. Such under-luminous GRBs might be very common but they are rarely recorded because they can be detected only from short distances. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000242449600013 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7106]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel 2.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 4.Univ Copenhagen, Niels Bohr Inst, Natl Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark |
| 推荐引用方式 GB/T 7714 | Fan, Yi-Zhong,Piran, Tsvi,Xu, Dong. The interpretation and implication of the afterglow of GRB 060218[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2006(9). |
| APA | Fan, Yi-Zhong,Piran, Tsvi,&Xu, Dong.(2006).The interpretation and implication of the afterglow of GRB 060218.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(9). |
| MLA | Fan, Yi-Zhong,et al."The interpretation and implication of the afterglow of GRB 060218".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .9(2006). |
入库方式： OAI收割
来源：国家天文台
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