论文标题
解释GRB是否需要磁性的流出？
Is magnetically dominated outflow required to explain GRBs?
论文作者
论文摘要
产生伽马射线爆发的相对论流出的组成是一个长期的开放问题。有利于磁占主导地位的流出的主要参数之一是在其宽带时间解析的光谱中没有光电组件，其明显的例子为GRB 080916C。在这里，我们对此爆发进行时间分辨分析，并确认对其他光谱成分的先前检测。我们表明，这种亚辅助组件与在海岸方案深处的超旧式巴属流出的光球一致。我们认为，与以前的陈述相反，解释该GRB的解释不需要流出的磁优势。此外，同时在其及时阶段检测高能排放需要偏离单区发射模型。
The composition of relativistic outflows producing gamma-ray bursts is a long standing open question. One of the main arguments in favor of magnetically dominated outflows is the absence of photospheric component in their broadband time resolved spectra, with such notable example as GRB 080916C. Here, we perform a time-resolved analysis of this burst and confirm the previous detection of an additional spectral component. We show that this subdominant component is consistent with the photosphere of ultrarelativistic baryonic outflow, deep in the coasting regime. We argue that, contrary to previous statements, the magnetic dominance of the outflow is not required for the interpretation of this GRB. Moreover, simultaneous detection of high energy emission in its prompt phase requires departure from a one-zone emission model.
