论文标题
关于重复快速无线电爆发的全面分析
A Comprehensive Analysis on Repeating Fast Radio Bursts
论文作者
论文摘要
到目前为止，已经发现了将近700个快速无线电爆发（FRB）来源，其中29个FRB反复爆发。尽管已经建立了至少某些FRB和磁铁之间的牢固联系，但是这些谜团现象中的触发机制和辐射过程仍然存在高度争议。在这项研究中，我们建立了16个重复的FRB的样本，从中发现了至少5次爆发，其中包括最活跃的四个FRB 20121102a，20180916b，20190520b和20201124a。它们的爆发的各种关键参数是从文献中收集的，其中包括到达时间，脉冲宽度，分散度量（DM），法拉第旋转度量（RM），带宽，等待时间，峰值通量和通量。研究了这些参数的分布和时间演变。还广泛探索了各种参数对之间的潜在相关性。然后比较不同中继器的行为。发现FRB 20121102a的DM在长时间的时间表上似乎不断增加。大多数中继器的DM在狭窄范围内变化为$ \ pm 3 $ cm $^{ - 3} $ PC，FRB 20190520b的较大变化范围为$ \ pm 12 $ cm $^{ - 3} $ PC。随着时间的流逝，RM在不同的中继器中的混乱行为中演变。在绝对平均RM和$ \ rm {dm} _ {host} $之间找到线性相关性，这可能提供了一种估计FRB的红移的方法。通常，等待时间显示了主动重复源的类似的双峰分布。讨论了这些特征对基础物理学的含义。
Nearly 700 fast radio burst (FRB) sources have been detected till now, among which 29 FRBs are found to burst out repeatedly. Although a firm connection between at least some FRBs and magnetars has been established, the trigger mechanism and radiation process in these enigma phenomena are still highly controversial. In this study, we build a sample of 16 repeating FRBs from which at least five bursts have been detected, including the most active four repeaters of FRBs 20121102A, 20180916B, 20190520B and 20201124A. Various key parameters of their bursts are collected from the literature, which include the arrival time, pulse width, dispersion measure (DM), Faraday rotation measure (RM), bandwidth, waiting time, peak flux and fluence. The distribution and time evolution of these parameters are investigated. Potential correlations between various parameter pairs are also extensively explored. The behaviors of different repeaters are then compared. It is found that the DM of FRB 20121102A seems to increase continuously on a long timescale. While the DM of most repeaters varies in a narrow range of $\pm 3$ cm$^{-3}$ pc, FRB 20190520B is found to have a large variation range of $\pm 12$ cm$^{-3}$ pc. RM evolves with time in a much more chaos behavior in different repeaters. A linear correlation is found between the absolute mean RM and $\rm {DM}_{Host}$, which may provide a method to estimate the redshift of FRBs. Generally, the waiting time shows a similar bimodal distribution for the active repeating sources. The implications of these features to the underlying physics are discussed.
