A Binary Comb Model for Periodic Fast Radio Bursts
A Binary Comb Model for Periodic Fast Radio Bursts
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DOI：
10.3847/2041-8213/ab83fb
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发表时间：
2020-04-01
影响因子：
7.9
通讯作者：
Zhang, Bing
中科院分区：
文献类型：
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作者：
Ioka, Kunihito;Zhang, Bing
我们显示周期性的FRB 180916。J0158+65可以通过调用一个相互作用的中子星双星系统来解释，其轨道周期类似于16天。快速射电暴是由一颗高度磁化的脉冲星产生的，它的磁场被来自伴星的强风“梳理”，伴星可能是一颗大质量恒星，也可能是一颗毫秒脉冲星。快速射电暴脉冲星风在伴星的风中保留了一个清晰的漏斗，否则对重复快速射电暴发射的诱导康普顿或拉曼散射是不透明的。4天的活动窗口对应于漏斗指向地球的时间。这种相互作用也扰乱了快速射电暴脉冲星的磁层，并可能引发快速射电暴的发射。我们从观测中推导出了梳状体和快速射电暴脉冲星的物理约束条件，并估计了快速射电暴的事件率。在这种情况下，预测了可观测到的快速射电暴周期的下限。我们推测，在中子星双星系统中产生快速射电暴可能需要内在因素（强磁场和年轻）和外在因素（相互作用）。
We show that the periodic FRB 180916.J0158+65 can be interpreted by invoking an interacting neutron star binary system with an orbital period of similar to 16 days. The FRBs are produced by a highly magnetized pulsar, whose magnetic field is "combed" by the strong wind from a companion star, either a massive star or a millisecond pulsar. The FRB pulsar wind retains a clear funnel in the companion's wind that is otherwise opaque to induced Compton or Raman scatterings for repeating FRB emission. The 4 day active window corresponds to the time when the funnel points toward Earth. The interaction also perturbs the magnetosphere of the FRB pulsar and may trigger emission of FRBs. We derive the physical constraints on the comb and the FRB pulsar from the observations and estimate the event rate of FRBs. In this scenario, a lower limit on the period of observable FRBs is predicted. We speculate that both the intrinsic factors (strong magnetic field and young age) and the extrinsic factor (interaction) may be needed to generate FRBs in neutron star binary systems.