Asano 2009 辐射的慢加热模型

主要内容:
认为电子被激波加热是需要一段时间的, 可以用来解释伽玛暴的低能段为什么偏离同步预言的1/3. 并解释为什么有个延迟的高能辐射尾巴.

个人觉得模型本身如果是对的, 其他很多别的辐射机制也可以用过来了.

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Title:		Slow Heating Model of Gamma-Ray Burst: Photon Spectrum and Delayed Emission
Authors:		Asano, K.; Terasawa, T.
Publication:		eprint arXiv:0905.1392
Publication Date:		05/2009
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena
Comment:		20 pages, 7 figures
Bibliographic Code:		2009arXiv0905.1392A

Abstract

We propose a new mechanism for the prompt emission of gamma-ray burst. In our model electrons are continuously accelerated in the post shock region via plasma turbulance. Using Monte Carlo technique, we mimic the 2$^{\rm nd}$ order Fermi acceleraion due to plasma turbulance and obtain photon spectra. Since the acceleration balances with the synchrotron cooling, the observed low-energy spectral index is naturally explained. The resultant spectra can be consistent with observed spectra at least below $\sim 1$ MeV. The model also predicts delayed GeV-TeV emission due to inverse Compton and broad pulse profile of optical emission in some cases. Although nontrivial assumptions are required to reproduce MeV-GeV power-law spectra, the model implies the possibility to explain various kinds of luminosity correlations.

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