The Rarity of Repeating Fast Radio Bursts from Binary Neutron Star Mergers

The Rarity of Repeating Fast Radio Bursts from Binary Neutron Star Mergers
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双中子星合并产生的重复快速射电爆发的罕见性

DOI:
10.3847/1538-4357/ab7c5c
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发表时间:
2020-03
影响因子:
4.9
通讯作者:
Wang F. Y.
Wang F. Y.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zhang G. Q.;Yi S. X.;Wang F. Y.

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快速射电暴 (FRB) 是河外明亮的无线电频率发射脉冲,持续时间为毫秒。从观测上看,快速射电暴可分为两类:重复快速射电暴和非重复快速射电暴。目前,已发现20个物理起源未知的重复快速射电暴。第一个重复 FRB 121102 的定位和相关持久射电源的发现支持 FRB 由年轻的毫秒磁星提供动力,这些磁星可能是由大质量恒星的核心塌缩或双中子星 (BNS) 合并形成的。这两个形成通道可以通过 BNS 合并产生的引力波来区分。我们首先计算加拿大氢强度测绘实验(CHIME)观测到的重复快速射电暴局部形成率的下限。然后,根据先进 LIGO/Virgo 引力波探测器第三次观测运行 (O3) 的引力波探测,我们表明,只有一小部分 (6%) 的重复 FRB 是由 BNS 合并的年轻磁星产生的。因此,我们认为重复的快速射电暴更有可能是由大质量恒星核心塌陷中新生的新生磁星产生的,而不是由 BNS 合并产生的磁星产生的。
Fast radio bursts (FRBs) are extragalactic, bright pulses of emission at radio frequencies with millisecond durations. Observationally, FRBs can be divided into two classes, repeating FRBs and non-repeating FRBs. At present, 20 repeating FRBs have been discovered with unknown physical origins. Localization of the first repeating FRB 121102 and discovery of an associated persistent radio source support that FRBs are powered by young millisecond magnetars, which could be formed by the core-collapses of massive stars or binary neutron star (BNS) mergers. These two formation channels can be distinguished by the gravitational waves generated by BNSs mergers. We first calculate the lower limit of the local formation rate of repeating FRBs observed by the Canadian Hydrogen Intensity Mapping Experiment (CHIME). Then we show that only a small fraction (6%) of repeating FRBs are produced by young magnetars from BNS mergers, based on the gravitational-wave detections by the third observing run (O3) of the Advanced LIGO/Virgo gravitational-wave detectors. Therefore, we believe that repeating FRBs are more likely produced by newborn magnetars newborn from the core-collapses of massive stars rather than magnetars from BNS mergers.
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DOI: 10.3847/2041-8205/822/1/l7
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