GRB 080913中的磁能注入
Magnetic Energy Injection in GRB 080913
摘要：
GRB 080913的光谱红移为z=6.7，是最近发现的伽马射线暴GRB 090423（红移约为8.2）之前最遥远恒星天体的记录保持者。逐渐积累的高红移伽玛暴样品为宇宙再电离期伽玛暴的起源和物理提供了新的线索。本文对GRB 080913光学余辉的多波长数据进行了详细的数值拟合，并对它的环爆环境和其他模型参数进行了约束。我们的结论是，晚光学/X射线平台约一天，因为爆发是由于坡印廷通量占主导地位的注入从中央引擎，这很可能是一个巨大的旋转黑洞与超强磁场。
英文摘要：
GRB 080913, with a spectroscopically determined redshift of z=6.7, was the record holder of the remotest stellar object before the discovery of the recent gamma-ray burst GRB 090423, whose redshift is about 8.2. The gradually accumulated high redshift GRB sample has shed light on the origin and physics of GRBs during the cosmic re-ionization epoch. We here present a detailed numerical fit to the multi-wavelength data of the optical afterglow of GRB 080913 and then constrain its circum-burst environment and the other model parameters. We conclude that the late optical/X-ray plateau at about one day since the burst is due to the Poynting-flux dominated injection from the central engine which is very likely a massive spinning black hole with super strong magnetic fields.
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