论文标题
重复FRB 121102中可能的周期性活动
Possible periodic activity in the repeating FRB 121102
论文作者
论文摘要
发现至少有一些快速无线电爆发（FRB）重复的发现排除了这些特定爆发的祖细胞的灾难事件。 FRB〜121102是最深入的重复FRB，但尽管对源进行了广泛的监控，但以前尚未确定重复的潜在模式。在这里，我们使用76-m Lovell望远镜介绍了FRB〜121102的无线电监视活动的结果。使用Lovell数据中检测到的脉冲以及文献中的脉冲，我们报告了五年数据范围内对源的周期性行为的检测。我们预计该来源当前是“关闭”，并且应该为MJD范围$ 59002-59089 $（2020-06-02至2020-08-28）打开``On''。该结果以及最近从另一个重复的FRB发现周期性的结果，突出了需要长期监测高节奏重复FRB的必要性。使用模拟，我们表明，至少需要100个小时的望远镜时间才能在0.5---3天的节奏下重复FRB，以检测10--150天的周期性。如果这个时期是真实的，则表明重复的FRB在其活动周期中可能很难与中子星级预动力模型进行调和。
The discovery that at least some Fast Radio Bursts (FRBs) repeat has ruled out cataclysmic events as the progenitors of these particular bursts. FRB~121102 is the most well-studied repeating FRB but despite extensive monitoring of the source, no underlying pattern in the repetition has previously been identified. Here, we present the results from a radio monitoring campaign of FRB~121102 using the 76-m Lovell telescope. Using the pulses detected in the Lovell data along with pulses from the literature, we report a detection of periodic behaviour of the source over the span of five years of data. We predict that the source is currently `off' and that it should turn `on' for the approximate MJD range $59002-59089$ (2020-06-02 to 2020-08-28). This result, along with the recent detection of periodicity from another repeating FRB, highlights the need for long-term monitoring of repeating FRBs at a high cadence. Using simulations, we show that one needs at least 100 hours of telescope time to follow-up repeating FRBs at a cadence of 0.5--3 days to detect periodicities in the range of 10--150 days. If the period is real, it shows that repeating FRBs can have a large range in their activity periods that might be difficult to reconcile with neutron star precession models.
