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arXiv 1111.3378astro-ph.HE
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费米对伽马射线暴研究的影响

The Impact of Fermi on the Study of Gamma-ray Bursts

Asaf Pe'er

摘要:

最近的费米实验结果把注意力集中在γ射线暴的瞬发阶段,这是一个现象学上丰富而又知之甚少的阶段。费米观测到的宽带光谱不符合现有理论模型的任何框架。因此,费米的结果迫使人们对那些被认为已经解决的问题进行新的思考。我在这里强调的基本开放的问题之前,推出费米,关键费米结果,并出现新的理论思想,这些结果。其中包括:(一)重新对磁化外流产生兴趣,以了解其动力学和组成;(二)对光球发射的兴趣,特别是如何扩大“普朗克”光谱,使之与观测到的“带”光谱相似;(三)首次在短伽玛暴中观测到的高能光子(LAT)的令人困惑的起源;(四)估算外流的洛伦兹因子的新方法。

英文摘要:

Recent Fermi results have focused attention on gamma-ray burst's (GRB) prompt emission phase, which is rich in phenomenology and poorly understood. The broad band spectra observed by Fermi does not fit into any of the frameworks of existing theoretical models. Thus, Fermi results force new thinking of questions that were thought to be solved. I highlight here the basic open questions prior to the launch of Fermi, key Fermi results, and new theoretical ideas that emerged following these results. These include: (I) renewed interest in magnetized outflows as a way to understand the dynamics and composition; (II) interest in photospheric emission, in particular ways to broaden "Planck" spectrum to resemble the observed "Band" spectrum; (III) The puzzling origin of the high energy (LAT) photons, first observed in short GRBs; and (IV) new methods to estimate the Lorentz factor of the outflow.

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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