RADIO OBSERVATIONS OF GRB 100418a: TEST OF AN ENERGY INJECTION MODEL EXPLAINING LONG-LASTING GRB AFTERGLOWS
文献类型：期刊论文
| 作者 | Moin, A.1,2; Chandra, P.3; Miller-Jones, J. C. A.2; Tingay, S. J.2; Taylor, G. B.4,5; Frail, D. A.5; Wang, Z.1 ; Reynolds, C.2; Phillips, C. J.6
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2013-12-20 |
| 卷号 | 779期号:2 |
| 关键词 | gamma-ray burst: individual (GRB 100418a) radiation mechanisms: non-thermal radio continuum: general relativistic processes stars: winds, outflows |
| 英文摘要 | We present the results of our radio observational campaign of gamma-ray burst (GRB) 100418a, for which we used the Australia Telescope Compact Array, the Very Large Array, and the Very Long Baseline Array. GRB 100418a was a peculiar GRB with unusual X-ray and optical afterglow profiles featuring a plateau phase with a very shallow rise. This observed plateau phase was believed to be due to a continued energy injection mechanism that powered the forward shock, giving rise to an unusual and long-lasting afterglow. The radio afterglow of GRB 100418a was detectable several weeks after the prompt emission. We conducted long-term monitoring observations of the afterglow and attempted to test the energy injection model advocating that the continuous energy injection is due to shells of material moving at a wide range of Lorentz factors. We obtained an upper limit of gamma < 7 for the expansion rate of the GRB 100418a radio afterglow, indicating that the range-of-Lorentz factor model could only be applicable for relatively slow-moving ejecta. A preferred explanation could be that continued activity of the central engine may have powered the long-lasting afterglow. |
| 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-BURST ; COSMOLOGICAL FIREBALL MODEL ; RELATIVISTIC FIREBALLS ; SOFTWARE CORRELATOR ; REFRESHED SHOCKS ; LIGHT CURVES ; ANGULAR SIZE ; GRB-030329 ; EMISSION ; ORIGIN |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000328187200015 |
| 公开日期 | 2014-09-22 |
| 源URL | [http://119.78.226.72//handle/331011/15141]  |
| 专题 | 上海天文台_空间导航与定位技术重点实验室 |
| 作者单位 | 1.Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia 3.Tata Inst Fundamental Res, Natl Ctr Radio Astrophys, Pune, Maharashtra, India 4.Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA 5.Natl Radio Astron Observ, Socorro, NM 87801 USA 6.CSIRO Astron & Space Sci, Epping, NSW, Australia |
| 推荐引用方式 GB/T 7714 | Moin, A.,Chandra, P.,Miller-Jones, J. C. A.,et al. RADIO OBSERVATIONS OF GRB 100418a: TEST OF AN ENERGY INJECTION MODEL EXPLAINING LONG-LASTING GRB AFTERGLOWS[J]. ASTROPHYSICAL JOURNAL,2013,779(2). |
| APA | Moin, A..,Chandra, P..,Miller-Jones, J. C. A..,Tingay, S. J..,Taylor, G. B..,...&Phillips, C. J..(2013).RADIO OBSERVATIONS OF GRB 100418a: TEST OF AN ENERGY INJECTION MODEL EXPLAINING LONG-LASTING GRB AFTERGLOWS.ASTROPHYSICAL JOURNAL,779(2). |
| MLA | Moin, A.,et al."RADIO OBSERVATIONS OF GRB 100418a: TEST OF AN ENERGY INJECTION MODEL EXPLAINING LONG-LASTING GRB AFTERGLOWS".ASTROPHYSICAL JOURNAL 779.2(2013). |
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来源：上海天文台
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