论文标题
伽马射线爆发余星物理和vhe域
Gamma-ray bursts afterglow physics and the VHE domain
论文作者
论文摘要
从无线电带延伸到GEV能量的伽马射线爆发（GRB）中的余辉辐射是由于相对论射流与环境介质之间的相互作用而产生的。尽管通常将发射的起源可靠地识别为从冲击加速电子中的同步辐射，但许多方面的限制仍然很差，例如逆变池发射的作用，粒子加速度机制，环境和GRB射流本身的特性。余辉发射到TEV频段的扩展已被讨论并理论上了多年，但长期以来一直在观察。最近，Cherenkov望远镜魔术和H.E.S.S.明确证明，余辉辐射的产生也超过$ 100 $ \，GEV至少几个TEV。 TEV光谱窗口的可访问性将在即将到来的设施CTA（{} Cherenkov望远镜阵列）中有所改善。在这篇评论文章中，我们首先修改了GRB中余辉排放的当前模型，其局限性和开放性问题。然后，我们描述了GRB的非常高能量发射的最新检测和该辐射的起源。将深入研究对余辉辐射的理解以及对所涉及过程物理学的限制的影响，以表明未来的观察结果，尤其是{} CTA天文台，如何在提高我们对这种难以捉摸的来源的理解方面做出关键的贡献。
Afterglow radiation in gamma-ray bursts (GRB), extending from the radio band to GeV energies, is produced as a result of the interaction between the relativistic jet and the ambient medium. Although in general the origin of the emission is robustly identified as synchrotron radiation from the shock-accelerated electrons, many aspects remain poorly constrained, such as the role of inverse Compton emission, the particle acceleration mechanism, the properties of the environment and of the GRB jet itself. The extension of the afterglow emission into the TeV band has been discussed and theorized for years, but has eluded for a long time the observations. Recently the Cherenkov telescopes MAGIC and H.E.S.S. have unequivocally proven that afterglow radiation is produced also above $100$\,GeV, up to at least a few TeV. The accessibility of the TeV spectral window will largely improve with the upcoming facility CTA ({the} Cherenkov Telescope Array). In this review article, we first revise the current model for afterglow emission in GRBs, its limitations and open issues. Then we describe the recent detections of very high energy emission from GRBs and the origin of this radiation. Implications on the understanding of afterglow radiation and constraints on the physics of the involved processes will be deeply investigated, showing how future observations, especially {by} the CTA Observatory, are expected to give a key contribution in improving our comprehension of such elusive sources.
