GRB 220408B：来自进动喷流的三段式暴
高能天体物理现象
2023-02-08 v1
摘要
喷流进动此前被提出用于解释少数伽马射线暴（GRBs）光变曲线中看似重复的特征。在本{\it Letter}中，我们通过检验其时间性与光谱一致性是否契合模型预言，进一步将进动模型应用于明亮的GRB 220408B。作为我们GRID立方星任务近来确认的GRBs之一，GRB 220408B因展现三段明显相似的发射时段而引人注目。此外，它们强烈的时间关联及在光谱演化与光谱滞后方面的相似特征进一步强化了这种相似性。我们的分析表明，这些特征可由一个快速上升指数衰减（FRED）形状光变曲线的调制发射很好地解释，该光变曲线本征由进动周期为秒、章动周期为秒且离轴观测的进动喷流产生。本研究为复杂却相似的多段GRB光变曲线提供了直截了当的解释。
引用
@article{arxiv.2302.03215,
title = {GRB 220408B: A Three-Episode Burst from a Precessing Jet},
author = {Zijian Zhang and Yihan Yin and Chenyu Wang and Xiangyu Ivy Wang and Jun Yang and Yan-Zhi Meng and Zi-Ke Liu and Guo-Yin Chen and Xiaoping Fu and Huaizhong Gao and Sihao Li and Yihui Liu and Xiangyun Long and Yong-Chang Ma and Xiaofan Pan and Yuanze Sun and Wei Wu and Zirui Yang and Zhizhen Ye and Xiaoyu Yu and Shuheng Zhao and Xutao Zheng and Tao Zhou and Qing-Wen Tang and Qiurong Yan and Rong Zhou and Zhonghai Wang and Hua Feng and Ming Zeng and Bin-Bin Zhang},
journal= {arXiv preprint arXiv:2302.03215},
year = {2023}
}
备注
11 pages, 3 tables, 8 figures