Narrow-band giant pulses from the Crab pulsar
Narrow-band giant pulses from the Crab pulsar
复制标题
DOI：
10.1093/mnras/stab2692
复制
发表时间：
2021-05
影响因子：
4.8
通讯作者：
Parasar Thulasiram;Hsiu-Hsien Lin
中科院分区：
文献类型：
--
作者：
Parasar Thulasiram;Hsiu-Hsien Lin
我们使用了一种新的光谱拟合技术，从蟹状脉冲星的1578个窄带大脉冲中识别出了6个亚群。这些巨大的脉冲是用阿尔冈昆射电天文台的46米天线在400-800兆赫的77分钟观测到的。窄带大脉冲由主脉冲和间脉冲组成，因此更有可能是由内在发射机制引起的，而不是由传播效应引起的。快速射电暴（frb）已经显示出类似的窄带特征，而在脉冲星的巨大脉冲中却几乎没有观察到。我们报道了Δν/ν为0.1数量级的窄带大脉冲，接近于报道的FRB 20190711A中继器的0.05数量级。由此进一步确立了快速射电暴与脉冲星巨脉冲之间的联系。
We used a new spectral-fitting technique to identify a subpopulation of 6 narrow-band giant pulses from the Crab pulsar out of a total of 1578. These giant pulses were detected in 77 min of observations with the 46-m dish at the Algonquin Radio Observatory at 400–800 MHz. The narrow-band giant pulses consist of both main- and inter-pulses, thereby being more likely to be caused by an intrinsic emission mechanism as opposed to a propagation effect. Fast radio bursts (FRBs) have demonstrated similar narrow-band features, while only little has been observed in the giant pulses of pulsars. We report the narrow-band giant pulses with Δν/ν of the order of 0.1, which is close to the value of 0.05 reported for the repeater FRB 20190711A. Hence, the connection between FRBs and giant pulses of pulsars is further established.