论文标题
在风能环境中建模GRB 221009a的极高能量余辉的可能性
The Possibility of Modeling the Very High Energy Afterglow of GRB 221009A in a Wind Environment
论文作者
论文摘要
在本文中，我们详细详细介绍了稀有事件GRB 221009a余辉的动力学和辐射物理。通过引入在以恒星风为主导的环境中传播的顶级喷气式飞机，我们解释了第一周与GRB 221009A相关的余辉的公开观察结果。可以预测，GRB 221009A在我们的模型中基于同步加速器自compton（SSC）过程发出了极高的能量（VHE）余辉。我们显示了GRB 221009a的宽带光谱分布（SED）分析结果，并发现GRB 221009a的SSC辐射分量在0.1-10 TEV频段中非常明亮。集成的SED表明，TEV带中的SSC发射显着高于Lhasso，Magic和CTA的检测灵敏度。但是，自从发布进一步观察以来，与标准风环境模型的偏差逐渐显示在数据中。例如，在标准风环境中不能始终如一地解释延迟时间余潮。可能有必要考虑使用具有复杂几何形状或标准模型的部分修订的结构化射流进行建模。此外，我们发现GEV观测值的包含可能会破坏模型参数之间的堕落性，从而突出了高能量观测值在确定GRB余波准确参数时的重要性。
In this paper, we model the dynamics and radiation physics of the rarity event GRB 221009A afterglow in detail. By introducing a top-hat jet that propagates in an environment dominated by stellar winds, we explain the publicly available observations of afterglow associated with GRB 221009A over the first week. It is predicted that GRB 221009A emits a luminous very high energy (VHE) afterglow based on the synchrotron self-Compton (SSC) process in our model. We show the broadband spectral energy distribution (SED) analysis results of GRB 221009A, and find that the SSC radiation component of GRB 221009A is very bright in the 0.1 - 10 TeV band. The integrated SED shows that the SSC emission in the TeV band has significantly higher than the detection sensitivity of LHASSO, MAGIC and CTA. However, since the release of further observations, deviations from the standard wind environment model gradually show up in data. For example, the late-time multiband afterglow cannot be consistently explained under the standard wind environment scenario. It may be necessary to consider modeling with a structured jet with complex geometry or a partial revision of the standard model. Furthermore, we find that the inclusion of GeV observations could break the degeneracy between model parameters, highlighting the significance of high-energy observations in determining accurate parameters for GRB afterglows.
