Recently, a 16-day periodicity in one fast radio burst is reported. We propose that this 16-day periodicity may be due to forced precession of the neutron star by a fallback disk. When the rotation axis is misaligned with the normal direction of the disk plane, the neutron star will precess. The eccentricity of the neutron star may be due to rotation or strong magnetic field etc. We found that the 16-day period may be understood using typical masses of the fallback disk. Polarization observations and information about the neutron star rotation period may help to discriminate different models. The possible precession observations in pulsars, magnetars, and fast radio bursts may be understood together using forced precession by a fallback disk.

中文翻译：

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由于后备盘的强制进动导致快速射电暴的周期性

最近，报告了一个快速射电暴的 16 天周期。我们认为这个 16 天的周期可能是由于后备盘强迫中子星进动。当自转轴与盘面法线方向错位时，中子星会进动。中子星的偏心率可能是由于自转或强磁场等原因。我们发现，16 天的周期可以用典型的后备盘质量来理解。极化观测和有关中子星自转周期的信息可能有助于区分不同的模型。脉冲星、磁星和快速射电暴中可能的进动观测可以通过回退盘的强制进动一起理解。