论文标题
与其主人星系相关的遥远的快速无线电爆发与非常大的阵列
A Distant Fast Radio Burst Associated to its Host Galaxy with the Very Large Array
论文作者
论文摘要
我们介绍了与Karl G. Jansky非常大的阵列和真实搜索系统的新快速无线电爆发的发现和超级本地化。 FRB于2019年6月14日发现，分散量度为959 PC/cm3。这是任何局部FRB中最高的DM，其测量的爆发通量为0.6 JY MS小于几乎所有其他FRB。未检测到源在15小时的VLA观察和153小时的铃声/FRB观察中重复。我们描述了一套统计和数据质量测试，用于验证事件的重要性及其本地化精度。与Keck和Gemini的后续光学/红外光度法将FRB与$ \ rm {R} \ SIM23 $ MAG的一对星系相关联。与主机银河相关的此意义的无线电瞬变的误报率约为$ 3 \ times10^{ - 4} \ \ rm {hr}^{ - 1} $。两个推定的主机星系具有$ z {\ rm {phot}}} \ sim0.6 $的相似的光度红移，但是不同的颜色和恒星质量。将宿主距离与分散度度量所隐含的距离进行比较，这表明与FRB环境或宿主星系/星系相关的适度（〜50 pc/cm3）电子柱密度。
We present the discovery and subarcsecond localization of a new Fast Radio Burst with the Karl G. Jansky Very Large Array and realfast search system. The FRB was discovered on 2019 June 14 with a dispersion measure of 959 pc/cm3. This is the highest DM of any localized FRB and its measured burst fluence of 0.6 Jy ms is less than nearly all other FRBs. The source is not detected to repeat in 15 hours of VLA observing and 153 hours of CHIME/FRB observing. We describe a suite of statistical and data quality tests we used to verify the significance of the event and its localization precision. Follow-up optical/infrared photometry with Keck and Gemini associate the FRB to a pair of galaxies with $\rm{r}\sim23$ mag. The false-alarm rate for radio transients of this significance that are associated with a host galaxy is roughly $3\times10^{-4}\ \rm{hr}^{-1}$. The two putative host galaxies have similar photometric redshifts of $z_{\rm{phot}}\sim0.6$, but different colors and stellar masses. Comparing the host distance to that implied by the dispersion measure suggests a modest (~ 50 pc/cm3) electron column density associated with the FRB environment or host galaxy/galaxies.
