Inferring the emission regions for different kinds of gamma-ray bursts
文献类型：期刊论文
| 作者 | Zhang ZB(张志彬)3 ; Xie GZ(谢光中)1; Deng, JG2; Wei BT(魏丙涛)1,3
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| 刊名 | ASTRONOMISCHE NACHRICHTEN
 |
| 出版日期 | 2007 |
| 卷号 | 328期号:1页码:99-104 |
| 关键词 | gamma-rays : bursts gamma rays : theory methods : numerical |
| ISSN号 | 0004-6337 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Zhang, ZB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 10, Kunming 650011, Yunnan, Peoples R China. |
| 英文摘要 | Using a theoretical model describing pulse shapes, we have clarified the relations between the observed pulses and their corresponding timescales, such as the angular spreading time, the dynamic time as well as the cooling time. We find that the angular spreading timescale caused by curvature effect of fireball surface only contributes to the falling part of the observed pulses, while the dynamic one in the co-moving frame of the shell merely contributes to the rising portion of pulses provided the radiative time is negligible. In addition, the pulses resulted from the pure radiative cooling time of relativistic electrons exhibit properties of fast rise and slow decay (a quasi-FRED) profile together with smooth peaks. Besides, we interpret the phenomena of wider pulses tending to be more asymmetric to be a consequence of the difference in emission regions. Meanwhile, we find the intrinsic emission time is decided by the ratios of lorentz factors and radii of the shells between short and long bursts. Based on the analysis of asymmetry, our results suggest that the long GRB pulses may occur in the regions with larger radius, while the short bursts could locate at the smaller distance from central engine. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
| 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] | EXTERNAL SHOCK MODEL ; INTERNAL SHOCKS ; SPECTRAL LAGS ; TEMPORAL PROPERTIES ; FIREBALL MODEL ; LIGHT CURVES ; PULSE-WIDTH ; VARIABILITY ; AFTERGLOWS ; EVOLUTION |
| 收录类别 | SCI |
| 原文出处 | http://onlinelibrary.wiley.com/doi/10.1002/asna.200610666/abstract |
| 语种 | 英语 |
| WOS记录号 | WOS:000244047200014 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/7029]  |
| 专题 | 云南天文台_星系研究组 |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P. O. Box 110, Kunming, Yunnan, 650011, P.R. China 2.Physics Science and Technology Institute, Guangxi University, Nanning, Guangxi, 530004, P.R. China 3.The Graduate School of the Chinese Academy of Sciences, Beijing, 100049, P.R. China |
| 推荐引用方式 GB/T 7714 | Zhang ZB,Xie GZ,Deng, JG,et al. Inferring the emission regions for different kinds of gamma-ray bursts[J]. ASTRONOMISCHE NACHRICHTEN,2007,328(1):99-104. |
| APA | Zhang ZB,Xie GZ,Deng, JG,&Wei BT.(2007).Inferring the emission regions for different kinds of gamma-ray bursts.ASTRONOMISCHE NACHRICHTEN,328(1),99-104. |
| MLA | Zhang ZB,et al."Inferring the emission regions for different kinds of gamma-ray bursts".ASTRONOMISCHE NACHRICHTEN 328.1(2007):99-104. |
入库方式： OAI收割
来源：云南天文台
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