论文标题
多波长余花发射的两个组件喷气模型极为能量爆发GRB 221009A
Two-component jet model for multiwavelength afterglow emission of the extremely energetic burst GRB 221009A
论文作者
论文摘要
最近，通过对大气Cherenkov望远镜进行成像，在非常高能（VHE）伽马射线上检测到伽马射线爆发（GRB），并且经常调用两组分流模型来解释多波伦长度数据。在这项工作中，检查了来自极亮的GRB GRB 221009A的多波强余辉发射。该事件的各向同性等效的伽马射线能量是最大的，这表明与以前的VHE GRB相似，喷射开口角度很小，以至于准直校正后的伽玛射线能量是标称的。从如此狭窄的喷气机中发出的余辉发射太快了，尤其是当射流传播成均匀的Circumburst材料时。在两个组件的喷气模型中，另一个具有较小洛伦兹因子的宽射流组件占主导地位的余辉发射，我们表明，GRB 221009A的多波长数据可以通过狭窄和宽的喷气机的开头，其开口角度类似于其他VHE GRB。我们还讨论了如何通过观察结果来解开模型脱模元。
Recently gamma-ray bursts (GRBs) have been detected at very high-energy (VHE) gamma-rays by imaging atmospheric Cherenkov telescopes, and a two-component jet model has often been invoked to explain multiwavelength data. In this work, multiwavelength afterglow emission from an extremely bright GRB, GRB 221009A, is examined. The isotropic-equivalent gamma-ray energy of this event is among the largest, which suggests that similarly to previous VHE GRBs, the jet opening angle is so small that the collimation-corrected gamma-ray energy is nominal. Afterglow emission from such a narrow jet decays too rapidly, especially if the jet propagates into uniform circumburst material. In the two-component jet model, another wide jet component with a smaller Lorentz factor dominates late-time afterglow emission, and we show that multiwavelength data of GRB 221009A can be explained by narrow and wide jets with opening angles similar to those employed for other VHE GRBs. We also discuss how model degeneracies can be disentangled with observations.
