利用 FAST 探测 FRB 20240114A：形态分类与脉冲群框架下的漂移率测量
摘要
本研究利用五百米口径球面射电望远镜 (FAST) 对重复快闪射电波 (FRB) 源 FRB 20240114A 进行形态分类和漂移率测量。该 FRB 于 2024 年 1 月 14 日被检测到，显示出异常高的脉冲率，揭示了独特的属性。通过多个月的观测活动，我们选取了包括 3,203 个脉冲 (2,109 个脉冲群) 在内的数据集，用于 2024 年 3 月 12 日持续监测 session (15,780 秒) 中的观测。改进前的工作澄清了亚脉冲、脉冲和脉冲群的定义。使用 DM 平均值为 529.2 pc cm，我们将脉冲群分为向下漂移、向上漂移、无漂移、无漂移证据、不可清晰和复杂脉冲群。among 978 个显示漂移行为的脉冲群中，233 个 (23.82%) 显示向上漂移。此外，如果排除 142 个向上漂移的单分量脉冲群，向上漂移的双分量和多分量脉冲群仍占显示漂移行为的 836 个脉冲群中 10.89%，相当于 91 个脉冲群。Furthermore, if only upward drifting burst-clusters with consecutive time intervals (或向上漂移脉冲) 被考虑，仅剩 9 个脉冲。漂移率与其他物理量的比较显示，漂移率随峰值频率增加对于具有漂移行为的单分量脉冲群。此外，在单分量脉冲群中，向上漂移的脉冲群具有较小的有效宽度、带宽和通量，低于其向下漂移的对手。Kolmogorov-Smirnov 检验进一步表明，向上漂移的脉冲群具有更长的连续时间间隔，低于向下漂移的脉冲群，暗示具有不同底层物理机制。
引用
@article{arxiv.2507.14711,
title = {Investigating FRB 20240114A with FAST: Morphological Classification and Drifting Rate Measurements in a Burst-Cluster Framework},
author = {Long-Xuan Zhang and Shiyan Tian and Junyi Shen and Jun-Shuo Zhang and Dejiang Zhou and Lin Zhou and Po Ma and Tian-Cong Wang and Dengke Zhou and Jinlin Han and Yunpeng Men and Fayin Wang and Jiarui Niu and Pei Wang and Weiwei Zhu and Bing Zhang and Di Li and Yuan-Chuan Zou and Wei-Yang Wang and Yuan-Pei Yang and Qin Wu and He Gao and Ke-Jia Lee and Jia-Wei Luo and Rui Luo and Chao-Wei Tsai and Lin Lin and Wanjin Lu and Jintao Xie and Jianhua Fang and Jinhuang Cao and Chen-Chen Miao and Yuhao Zhu and Yunchuan Chen and Yong-Kun Zhang and Shuo Cao and Zi-Wei Wu and Chunfeng Zhang and Silu Xu and Huaxi Chen and Xiang-Lei Chen and Xianghan Cui and Yi Feng and Yu-Xiang Huang and Weicong Jing and Dong-Zi Li and Jian Li and Ye Li and Chen-Hui Niu and Yong-Feng Huang and Qingyue Qu and Yuanhong Qu and Bojun Wang and Yi-Dan Wang and Suming Weng and Xuefeng Wu and Heng Xu and Shihan Yew and Aiyuan Yang and Wenfei Yu and Lei Zhang and Rushuang Zhao},
journal= {arXiv preprint arXiv:2507.14711},
year = {2025}
}
备注
23 pages, 14 figures, 1 tables, the 3rd of papers from the FAST FRB Key Science Project Collaboration on FRB 20240114A: Burst Morphology Analysis, accepted for publication in ApJ