超临界堆GRB模型：余辉演化的提示
The Supercritical Pile GRB Model: The Prompt to Afterglow Evolution
摘要：
“超临界堆”是一种非常经济的伽马射线暴模型，它能将相对论性冲击波（RBW）质子中储存的能量有效地转换为辐射，同时在即时伽马射线暴阶段，即使没有任何粒子加速，也能产生能量为$\sim 1$ MeV的光谱峰值。我们扩展了这个模型，包括RBW洛伦兹因子$Γ$的演变，从而遵循其光谱和时间特征到早期的伽玛射线暴余辉阶段。本治疗的新特征之一是包括GRB产生的辐射对$Γ$随半径的演化的反馈。这种反馈以及模型中运动学和动力学阈值的存在是我们已经开始探索的潜在非常丰富的时间演化的来源。特别地，可以通过这种方式获得余辉光曲线，其具有陡峭的衰减，随后是更常规的更平坦的余辉斜率，同时保留模型的期望特征，即，在$νF_ν$光谱中产生适当峰值的良好定义的相对论电子源和辐射过程。在本说明中，我们提出了一组特定的参数，这个模型的结果，重点是多波长的即时发射和过渡到早期余辉。
英文摘要：
The "Supercritical Pile" is a very economical GRB model that provides for the efficient conversion of the energy stored in the protons of a Relativistic Blast Wave (RBW) into radiation and at the same time produces - in the prompt GRB phase, even in the absence of any particle acceleration - a spectral peak at energy $\sim 1$ MeV. We extend this model to include the evolution of the RBW Lorentz factor $Γ$ and thus follow its spectral and temporal features into the early GRB afterglow stage. One of the novel features of the present treatment is the inclusion of the feedback of the GRB produced radiation on the evolution of $Γ$ with radius. This feedback and the presence of kinematic and dynamic thresholds in the model are sources of potentially very rich time evolution which we have began to explore. In particular, one can this way obtain afterglow light curves with steep decays followed by the more conventional flatter afterglow slopes, while at the same time preserving the desirable features of the model, i.e. the well defined relativistic electron source and radiative processes that produce the proper peak in the $νF_ν$ spectra. In this note we present the results of a specific set of parameters of this model with emphasis on the multiwavelength prompt emission and transition to the early afterglow.
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