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arXiv 1306.5207astro-ph.HE
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GRB 130427 A前所未有的长寿命高能发射的解释

Interpretation of the unprecedentedly long-lived high-energy emission of GRB 130427A

Ruo-Yu Liu, Xiang-Yu Wang, Xue-Feng Wu

摘要:

费米/LAT在GRB 130427 A爆发后的一天内探测到了高能光子(>100 MeV),并在高能余辉中发现了额外的硬光谱成分。我们表明,这硬光谱分量来自余辉同步自康普顿发射。这种情况可以解释在爆发后30000秒内探测到的>10 GeV光子的来源,由于最大同步辐射光子能量有限,这很难用同步辐射解释。低能多波长余辉数据可以用同步辐射余辉数据同时拟合。讨论了在暴流环境下探测SSC辐射的意义。

英文摘要:

High energy photons (>100 MeV) are detected by the Fermi/LAT from GRB 130427A up to almost one day after the burst, with an extra hard spectral component being discovered in the high-energy afterglow. We show that this hard spectral component arises from afterglow synchrotron-self Compton emission. This scenario can explain the origin of >10 GeV photons detected up to ~30000s after the burst, which would be difficult to be explained by synchrotron radiation due to the limited maximum synchrotron photon energy. The lower energy multi-wavelength afterglow data can be fitted simultaneously by the afterglow synchrotron emission. The implication of detecting the SSC emission for the circumburst environment is discussed.

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