论文标题
与澳大利亚平方公里阵列探路者定位的快速无线电爆发的主机星系和祖细胞
The host galaxies and progenitors of Fast Radio Bursts localized with the Australian Square Kilometre Array Pathfinder
论文作者
论文摘要
澳大利亚的SKA探路者（ASKAP）望远镜已开始将快速无线电突发（FRB）定位为从单个脉冲的检测中，以使其宿主星系可靠地识别。我们讨论了Askap定位的前四个FRB的主机星系的全球属性，该型号位于红移范围内，$ 0.11 <z <0.48 $。 All four are massive galaxies (log( $M_{*}/ M_{\odot}$) $\sim 9.4 -10.4$) with modest star-formation rates of up to $2M_{\odot}$yr$^{-1}$ -- very different to the host galaxy of the first repeating FRB 121102, which is a dwarf galaxy with a high specific恒星形成率。通过ASKAP所定位的FRB通常位于其宿主星系的郊区，这似乎排除了FRB祖细胞模型，这些模型会调用活跃的银河核（AGN）或自由浮动的宇宙弦。这些宿主星系中看到的恒星种群还消除了模型，其中所有FRB均来自超小超级新星（SLSNE）产生的年轻磁铁（如FRB 121102的祖先。
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 range $0.11<z<0.48$. All four are massive galaxies (log( $M_{*}/ M_{\odot}$) $\sim 9.4 -10.4$) with modest star-formation rates of up to $2M_{\odot}$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 (AGN) or free-floating cosmic strings. The stellar population seen in these host galaxies also disfavors models in which all FRBs arise from young magnetars produced by superluminous supernovae (SLSNe), as proposed for the progenitor of FRB 121102. A range of other progenitor models (including compact-object mergers and magnetars arising from normal core-collapse supernovae) remain plausible.
