The Australian SKA Pathfinder (ASKAP) telescope has started to localize fast radio bursts (FRBs) to arcsecond accuracy from the detection of a single pulse, allowing their host galaxies to be reliably identified. We discuss the global properties of the host galaxies of the first four FRBs localized by ASKAP, which lie in the redshift range0.11 < z < 0.48. All four are massive galaxies (log( M * / M ⊙ ) ∼ 9.4–10.4) with modest star formation rates of up to2 M ⊙ yr −1 —very different to the host galaxy of the first repeating FRB 121102, which is a dwarf galaxy with a high specific star formation rate. The FRBs localized by ASKAP typically lie in the outskirts of their host galaxies, which appears to rule out FRB progenitor models that invoke active galactic nuclei or free-floating cosmic strings. The stellar population seen in these host galaxies also disfavors models in which all FRBs arise from young magne...

中文翻译：

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澳大利亚方千米阵列探路者定位的快速无线电爆发的宿主星系和祖先。

澳大利亚SKA探路者（ASKAP）望远镜已经开始从检测单个脉冲开始将快速无线电脉冲（FRB）定位到弧秒精度，从而可以可靠地识别其主星系。我们讨论了由ASKAP定位的前四个FRB的宿主星系的全局特性，它们位于红移范围0.11 <z <0.48中。这四个都是大质量星系（log（M * / M）〜9.4-10.4）），适度的恒星形成率高达2 M⊙yr -1-与第一个重复的FRB 121102的主星系完全不同，后者是一个矮星具有高特定恒星形成率的星系。由ASKAP定位的FRB通常位于其宿主星系的郊区，这似乎排除了调用活动银河核或自由漂浮的宇宙弦的FRB祖先模型。