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arXiv 1409.2874astro-ph.HEhep-ph
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伽马射线暴中多次内震的中微子和cosmic-ray发射

Neutrino and cosmic-ray emission from multiple internal shocks in gamma-ray bursts

Mauricio Bustamante, Philipp Baerwald, Kohta Murase, Walter Winter

摘要:

伽马射线暴是在宇宙学距离上短暂的发光爆炸,被认为是起源于大质量恒星死亡时发射的相对论喷流。它们是产生观测到的最高能量宇宙射线的主要候选者之一。然而,最近的中微子数据已经开始在只有一个发射区的最简单模型中限制这种可能性。在伽马射线暴的经典理论中,粒子被从中央引擎喷射出的物质碰撞产生的温和相对论性冲击加速。我们考虑中微子和宇宙射线从多个发射区的发射,因为这些内部碰撞必须发生在非常不同的半径,从光球层以下的所有方式到环暴介质,作为有效的动能耗散的结果。我们证明,不同的信使起源于不同的碰撞半径,这意味着多信使观测打开窗口,揭示不断变化的伽玛暴外流。

英文摘要:

Gamma-ray bursts are short-lived, luminous explosions at cosmological distances, thought to originate from relativistic jets launched at the deaths of massive stars. They are among the prime candidates to produce the observed cosmic rays at the highest energies. Recent neutrino data have, however, started to constrain this possibility in the simplest models with only one emission zone. In the classical theory of gamma-ray bursts, it is expected that particles are accelerated at mildly relativistic shocks generated by the collisions of material ejected from a central engine. We consider neutrino and cosmic-ray emission from multiple emission regions since these internal collisions must occur at very different radii, from below the photosphere all the way out to the circumburst medium, as a consequence of the efficient dissipation of kinetic energy. We demonstrate that the different messengers originate from different collision radii, which means that multi-messenger observations open windows for revealing the evolving GRB outflows.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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