位于扩张超新星遗骸中的持续活跃快闪频射源
高能天体物理现象
2026-02-04 v2
摘要
快闪频射(FRB)是最令人困惑的天体物理现象之一。虽然大多数FRB仅被检测一次或不规则地检测，但我们报告了FRB 20190520B被识别为持续活跃源，持续约四年。这一罕见的长期活跃使我们能够详细调查其位移测量(DM)演化。我们还报告称FRB 20190520B显示出显著的DM下降，全球速率为-12.4±0.3 pc cm^-3 yr^-1，超过前一FRB DM变动测量的三倍，超过脉冲星观测到的水平数个数量级。DM演化的幅度和一致性，以及高主机DM贡献，强烈表明该源位于密集的、不断膨胀的电离介质中，可能是一颗年轻的超新星遗骸(SNR)。
关键词
引用
@article{arxiv.2512.05448,
title = {A Persistently Active Fast Radio Burst source Embedded in an Expanding Supernova Remnant},
author = {Chen-Hui Niu and Di Li and Yuan-Pei Yang and Yuhao Zhu and Yongkun Zhang and Jia-heng Zhang and Zexin Du and Jumei Yao and Xiaoping Zheng and Pei Wang and Yi Feng and Bing Zhang and Weiwei Zhu and Wenfei Yu and Ji-an Jiang and Shi Dai and Chao-Wei Tsai and A. M. Chen and Yijun Hou and Jiarui Niu and Weiyang Wang and Chenchen Miao and Xinming Li and Junshuo Zhang},
journal= {arXiv preprint arXiv:2512.05448},
year = {2026}
}