| Relationships between Relative Spectral Lags and Relative Widths of Gamma-ray Bursts |
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| 作者姓名： | Zhao-Yang Peng Rui-Jing Lu Yi-Ping Qin Bin-Bin Zhang |
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| 作者单位： | Zhao-Yang Peng1，4，Rui-Jing Lu2，Yi-Ping Qin1，2，3 and Bin-Bin Zhang1，4 1 National Astronomical Observatories / Yunnan Observatory，Chinese Academy of Sciences，Kunming 650011 2 Physics Department，Guangxi University，Nanning 530004 3 Center for Astrophysics，Guangzhou University，Guangzhou 510400 4 Graduate School of Chinese Academy of Sciences，Beijing 100049 |
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| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划(973计划);国家自然科学基金 |
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| 摘 要： | The phenomenon of gamma-ray burst (GRB) spectral lags is very common, but a definitive explanation has not yet been given. From a sample of 82 GRB pulses we find that the spectral lags are correlated with the pulse widths, however, there is no correlation be- tween the relative spectral lags and the relative pulse widths. We suspect that the correlations between spectral lags and pulse widths might be caused by the Lorentz factor of the GRBs concerned. Our analysis on the relative quantities suggests that the intrinsic spectral lag might reflect other aspect of pulses than the aspect associated with the dynamical time of shocks or that associated with the time delay due to the curvature effect.
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| 关 键 词： | gamma-rays: bursts — methods: statistical — gamma-rays: theory |
| 修稿时间： | 2006-08-08 |
Relationships between Relative Spectral Lags and Relative Widths of Gamma-ray Bursts |
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| Zhao-Yang Peng Rui-Jing Lu Yi-Ping Qin Bin-Bin Zhang.Relationships between Relative Spectral Lags and Relative Widths of Gamma-ray Bursts[J].Chinese Journal of Astronomy and Astrophysics,2007,7(3):428-434. |
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| Authors: | Zhao-Yang Peng Rui-Jing Lu Yi-Ping Qin Bin-Bin Zhang |
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| Abstract: | The phenomenon of gamma-ray burst (GRB) spectral lags is very common, but a definitive explanation has not yet been given. From a sample of 82 GRB pulses we find that the spectral lags are correlated with the pulse widths, however, there is no correlation be- tween the relative spectral lags and the relative pulse widths. We suspect that the correlations between spectral lags and pulse widths might be caused by the Lorentz factor of the GRBs concerned. Our analysis on the relative quantities suggests that the intrinsic spectral lag might reflect other aspect of pulses than the aspect associated with the dynamical time of shocks or that associated with the time delay due to the curvature effect. |
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| Keywords: | gamma-rays:bursts-methods:statistical-gamma-rays:theory |
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