论文标题
FRB 20191221a的混合脉冲星模型
Hybrid Pulsar-Magnetar Model for FRB 20191221A
论文作者
论文摘要
我们表明，报告的216.8 $ \ pm $ 0.1毫秒的周期性报告了快速无线电爆发（FRB）20191221a对于爆发模型非常有限。爆发周期性的高精度（比10 $^3 $中的一部分更好），以及2 \％的占空比（爆发 - 持续时间和胚胎间间隔的比率），这表明观察到的活性是一个类似脉冲星的旋转束模型；无线电波是在中子星表面的$ \ sim 10^7 $ cm内沿开放线产生的，而梁则定期扫过观察者，因为恒星旋转。根据这张图片，FRB 20191221a是一个因素$ \ sim 10^{12} $缩放的银河脉冲星的版本，其中一个主要区别：脉冲星将旋转动能转换为EM波，而20191221a的爆发则需要将磁能转换为磁能转换为辐射。
We show that the 216.8$\pm$0.1 ms periodicity reported for the fast radio burst (FRB) 20191221A is very constraining for burst models. The high accuracy of burst periodicity (better than one part in 10$^3$), and the 2\% duty cycle (ratio of burst-duration and inter-burst interval), suggest a pulsar-like rotating beam model for the observed activity; the radio waves are produced along open field lines within $\sim 10^7$ cm of the neutron star surface, and the beam periodically sweeps across the observer as the star spins. According to this picture, FRB 20191221A is a factor $\sim 10^{12}$ scaled up version of galactic pulsars with one major difference: whereas pulsars convert rotational kinetic energy to EM waves, the outbursts of 20191221A require conversion of magnetic energy to radiation.
