Commonwealth Science and Industrial Research Organisation, Australia Telescope National Facility, P.O. Box 76, Epping, NSW 1710, Australia.
Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
Science. 2019 Aug 9;365(6453):565-570. doi: 10.1126/science.aaw5903. Epub 2019 Jun 27.
Fast radio bursts (FRBs) are brief radio emissions from distant astronomical sources. Some are known to repeat, but most are single bursts. Nonrepeating FRB observations have had insufficient positional accuracy to localize them to an individual host galaxy. We report the interferometric localization of the single-pulse FRB 180924 to a position 4 kiloparsecs from the center of a luminous galaxy at redshift 0.3214. The burst has not been observed to repeat. The properties of the burst and its host are markedly different from those of the only other accurately localized FRB source. The integrated electron column density along the line of sight closely matches models of the intergalactic medium, indicating that some FRBs are clean probes of the baryonic component of the cosmic web.
快速射电暴（FRB）是来自遥远天文源的短暂无线电爆发。有些被已知重复，但大多数是单次爆发。非重复 FRB 观测的位置精度不足以将它们定位到单个宿主星系。我们报告了单次脉冲 FRB 180924 的干涉定位，该脉冲位于距离中心 4 千秒差距的一个明亮星系，红移为 0.3214。该爆发尚未被观测到重复。该爆发及其宿主的性质与唯一另一个准确定位的 FRB 源明显不同。沿视线的积分电子柱密度与星系间介质的模型非常吻合，这表明一些 FRB 是宇宙网络重子成分的干净探针。
