| Inferring the emission regions for different kinds of gamma-ray bursts | |
Zhang ZB(张志彬)3; Xie GZ(谢光中)1 ; Deng, JG2; Wei BT(魏丙涛)1,3; Zhang, ZB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 10, Kunming 650011, Yunnan, Peoples R China.
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| 发表期刊 | ASTRONOMISCHE NACHRICHTEN
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| 2007 | |
| 卷号 | 328期号:1页码:99-104 |
| DOI | 10.1002/asna.200610666 |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | Gamma-rays : Bursts Gamma Rays : Theory Methods : Numerical |
| 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 |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0004-6337 |
| URL | 查看原文 |
| 归档日期 | 2006-12-13 |
| WOS记录号 | WOS:000244047200014 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | EXTERNAL SHOCK MODEL ; INTERNAL SHOCKS ; SPECTRAL LAGS ; TEMPORAL PROPERTIES ; FIREBALL MODEL ; LIGHT CURVES ; PULSE-WIDTH ; VARIABILITY ; AFTERGLOWS ; EVOLUTION |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/7029 |
| 专题 | 星系研究组 |
| 通讯作者 | Zhang, ZB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 10, Kunming 650011, Yunnan, Peoples R China. |
| 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,&Zhang, ZB .(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. |
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| Inferring the emissi（288KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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