13个重复快速无线电爆发的亚微米定位

论文标题

13个重复快速无线电爆发的亚微米定位

Sub-arcminute localization of 13 repeating fast radio bursts detected by CHIME/FRB

论文作者

Michilli, Daniele, Bhardwaj, Mohit, Brar, Charanjot, Patel, Chitrang, Gaensler, B. M., Kaspi, Victoria M., Kirichenko, Aida, Masui, Kiyoshi W., Sand, Ketan R., Scholz, Paul, Shin, Kaitlyn, Stairs, Ingrid, Cassanelli, Tomas, Cook, Amanda M., Dobbs, Matt, Dong, Fengqiu Adam, Fonseca, Emmanuel, Ibik, Adaeze, Kaczmarek, Jane, Leung, Calvin, Pearlman, Aaron B., Petroff, Emily, Pleunis, Ziggy, Rafiei-Ravandi, Masoud, Sanghavi, Pranav, Tendulkar, Shriharsh P.

论文摘要

我们报告了通过使用望远镜的通道电压上使用干涉量学技术发现的13个重复快速无线电爆发（FRB）的13个重复快速无线电爆发（FRB）的天空定位。这些所谓的“基带定位”改善了过去研究中提出的定位不确定性区域，超过三个数量级。为完整的FRB样本提供了改进的定位区域，以实现后续研究。本地化不确定性，以及距离分散措施（DMS）的源距离的限制，使我们能够确定两个FRB来源的可能的宿主星系。 FRB 20180814A生活在Z〜0.068的巨大的被动红色螺旋中，几乎没有恒星形成的迹象，而FRB 20190303a居住在一对合并的螺旋星系中，Z〜0.064，经历了重要的恒星形成。这些星系显示出非常不同的特征，即使在重复的子类中，也证实了在各种环境中的FRB祖细胞的存在。

We report on improved sky localizations of thirteen repeating fast radio bursts (FRBs) discovered by CHIME/FRB via the use of interferometric techniques on channelized voltages from the telescope. These so-called 'baseband localizations' improve the localization uncertainty area presented in past studies by more than three orders of magnitude. The improved localization regions are provided for the full sample of FRBs to enable follow-up studies. The localization uncertainties, together with limits on the source distances from their dispersion measures (DMs), allow us to identify likely host galaxies for two of the FRB sources. FRB 20180814A lives in a massive passive red spiral at z~0.068 with very little indication of star formation, while FRB 20190303A resides in a merging pair of spiral galaxies at z~0.064 undergoing significant star formation. These galaxies show very different characteristics, further confirming the presence of FRB progenitors in a variety of environments even among the repeating sub-class.

下载PDF全文

下载文献需遵守相关版权规定

论文标题