Abstract

Gamma-ray bursts (GRBs) are the phenomena of rapid energy release of enormous power associated with the collapse or merging of stars. As a result of internal processes, populations of nonthermal accelerated particles radiating in a wide energy range are formed in them. A number of observations have shown that photons with energies up to tens of TeV are detected from some GRBs. However, due to the great energy losses of radiating particles, the explanation of this high-energy radiation in terms of standard radiation mechanisms runs into great difficulties. In this paper, based on the model of adiabatic expansion for the GRB afterglow phase, we investigate the influence of magnetic inhomogeneities on the spectra within the electron and proton synchrotron radiation mechanism by taking into account the Compton scattering of synchrotron photons. We show that the magnetic inhomogeneity effect can increase the maximum energies of the synchrotron radiation from electrons and protons several fold without affecting the maximum energies of the Compton photons being produced in the Klein–Nishina regime.

中文翻译：

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磁湍流对伽马射线暴余辉光谱的影响

摘要

伽马射线暴（GRB）是与恒星坍缩或合并相关的巨大能量快速释放的现象。由于内部过程，其中形成了在宽能量范围内辐射的非热加速粒子群。大量观测表明，在一些伽马射线暴中检测到了能量高达数十TeV的光子。然而，由于辐射粒子的能量损失很大，用标准辐射机制来解释这种高能辐射遇到了很大的困难。在本文中，基于GRB余辉相的绝热膨胀模型，我们通过考虑同步加速器光子的康普顿散射，研究了磁不均匀性对电子和质子同步加速器辐射机制内光谱的影响。我们证明，磁不均匀效应可以将电子和质子的同步加速器辐射的最大能量增加几倍，而不影响克莱因-仁科体系中产生的康普顿光子的最大能量。