在 FAST 漂移扫描巡天中发现的一例快速射电暴
高能天体物理现象
2020-05-27 v1
摘要
我们报道利用五百米口径球面射电望远镜(FAST)获取的约 1500 小时漂移扫描巡天数据分析中发现的一例高色散快速射电暴 FRB~181123。该脉冲具有三个不同的发射成分,且在我们 1.0--1.5~GHz 观测频带内随频率变化。我们测得峰值流量密度 ~Jy,相应流量 ~Jy~ms。基于观测到的色散量 1812~cm~pc,我们推断红移约为 。由此,我们估计峰值光度和各向同性能量分别不超过 ~erg~s 和 ~erg。由于迄今巡天中仅探测到一例 FRB,我们对事件率的约束有限。我们推导出对流量 ~Jy~ms 的 FRB,每日事件率的 95% 置信下限为 900 例。我们用 FAST 对该源进行了四小时后续观测,未发现重复爆发。我们讨论了该发现对理解 FRB 物理机制的意义。
引用
@article{arxiv.2004.14029,
title = {A Fast Radio Burst discovered in FAST drift scan survey},
author = {Weiwei Zhu and Di Li and Rui Luo and Chenchen Miao and Bing Zhang and Laura Spitler and Duncan Lorimer and Michael Kramer and David Champion and Youling Yue and Andrew Cameron and Marilyn Cruces and Ran Duan and Yi Feng and Jun Han and George Hobbs and Chenhui Niu and Jiarui Niu and Zhichen Pan and Lei Qian and Dai Shi and Ningyu Tang and Pei Wang and Hongfeng Wang and Mao Yuan and Lei Zhang and Xinxin Zhang and Shuyun Cao and Li Feng and Hengqian Gan and Long Gao and Xuedong Gu and Minglei Guo and Qiaoli Hao and Lin Huang and Menglin Huang and Peng Jiang and Chengjin Jin and Hui Li and Qi Li and Qisheng Li and Hongfei Liu and Gaofeng Pan and Bo Peng and Hui Qian and Xiangwei Shi and Jinyuo Song and Liqiang Song and Caihong Sun and Jinghai Sun and Hong Wang and Qiming Wang and Yi Wang and Xiaoyao Xie and Jun Yan and Li Yang and Shimo Yang and Rui Yao and Dongjun Yu and Jinglong Yu and Chengmin Zhang and Haiyan Zhang and Shuxin Zhang and Xiaonian Zheng and Aiying Zhou and Boqin Zhu and Lichun Zhu and Ming Zhu and Wenbai Zhu and Yan Zhu},
journal= {arXiv preprint arXiv:2004.14029},
year = {2020}
}
备注
7 pages, 3 figures, accepted for publication in ApJL