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arXiv 1504.02153astro-ph.HEastro-ph.CO
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伽马射线暴爆炸的数值模拟

Numerical Simulations of Gamma-Ray Burst Explosions

Davide Lazzati, Brian J. Morsony, Diego López-Cámara

摘要:

伽马射线暴是一个复杂的、非线性的系统,它在不同的条件下迅速演化。它们从几百公里的尺度演变而来,在那里它们是非常密集和热的,在秒差距尺度上是寒冷和稀薄的。因此,我们对这种现象的理解可以通过结合理论和数值研究来真正增加,采用不同的数值技术来面对不同的问题并处理不同的条件。在这篇评论中,我们将描述我们的理解的巨大进步,通过数值模拟的爆发现象。虽然我们将讨论的研究主要是基于喷流动力学跨越祖星和星际介质,我们也将触及其他问题,如喷流发射,它的加速,和辐射机制。最后,我们将描述如何将数值结果与Swift和其他仪器的观测结果相结合,从而真正理解爆发现象以及仍然面临的挑战。

英文摘要:

Gamma-ray bursts are a complex, non-linear system that evolves very rapidly through stages of vastly different conditions. They evolve from scales of few hundred kilometers where they are very dense and hot to cold and tenuous on scales of parsecs. As such, our understanding of such a phenomenon can truly increase by combining theoretical and numerical studies adopting different numerical techniques to face different problems and deal with diverse conditions. In this review, we will describe the tremendous advancement in our comprehension of the bursts phenomenology through numerical modeling. Though we will discuss studies mainly based on jet dynamics across the progenitor star and the interstellar medium, we will also touch upon other problems such as the jet launching, its acceleration, and the radiation mechanisms. Finally, we will describe how combining numerical results with observations from Swift and other instruments resulted in true understanding of the bursts phenomenon and the challenges still lying ahead.

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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