论文标题
在分层培养基中，伽马射线爆发的光学余波中的明亮反向冲击发射
The Bright Reverse Shock Emission in the Optical Afterglows of Gamma-ray Bursts in a Stratified Medium
论文作者
论文摘要
通常引入反向冲击（RS）模型来解释具有快速上升和衰减的光学余星，例如GRB 990123的早期光学余星（也称为光闪光灯）。在本文中，我们收集了11个伽马射线爆发（GRB）早期光学余星，这些光余滴具有主要的RS发射签名。由于光闪光的时间斜率由中密度分布指数$ K $和电子光谱指数$ p $确定，因此我们将薄壳盒的RS模型应用于光学闪光灯并确定祖细胞的环境介质。我们发现$ k $值在0-1.5的范围内。本文中的$ k $值与Yi等人的结果一致。 （2013年），将正向冲击（FS）模型应用于某些发作颠簸。但是，本文采用的方法仅适用于GRB的余星，并具有明显的急剧上升和衰减的RS排放。我们的结果表明，RS模型也可以应用于确认Circumburst培养基，进一步暗示GRB可能具有多样化的Circumburst培养基。
The reverse shock (RS) model is generally introduced to interpret the optical afterglows with the rapid rising and decaying, such as the early optical afterglow of GRB 990123 (which is also called optical flash). In this paper, we collected 11 gamma-ray bursts (GRBs) early optical afterglows, which have such signatures of dominant RS emission. Since the temporal slopes of the optical flashes are determined by both the medium density distribution index $k$ and the electron spectral index $p$, we apply the RS model of the thin shell case to the optical flashes and determine the ambient medium of the progenitors. We find that the $k$ value is in the range of 0 - 1.5. The $k$ value in this paper is consistent with the result in Yi et al. (2013), where the forward shock (FS) model was applied to some onset bumps. However, the method adopted in this paper is only applicable to GRB afterglows with significant sharp rising and decaying RS emission. Our results indicate that the RS model can also be applied to confirm the circumburst medium, further implying that GRBs may have diverse circumburst media.
