论文标题
Meerkat看着47张图卡纳脉冲星的极化：磁场的影响
A MeerKAT look at the polarization of 47 Tucanae pulsars: magnetic field implications
论文作者
论文摘要
我们使用来自UHF波段（544-1088 MHz）的Meerkat射电望远镜的观测值介绍了球状簇47图卡纳22个脉冲星的极化曲线，并报告了分散度度量（DM）和旋转度量（RM）的精确值。我们使用这些测量值研究电子密度和磁场中的湍流。 DM的结构函数显示在$ \ sim 30 $ arcsec（$ \ sim 0.6 $ pc的47图卡纳）中发生断裂，这表明由风射线恒星运动驱动的群集中的气体中存在湍流。另一方面，RM的结构函数并未显示出断裂的证据。这种非检测可以用有限数量的脉冲星或视线沿星系中的气体中间气体的影响来解释。集群中未来的脉冲星发现可以帮助确认存在并定位湍流。
We present the polarization profiles of 22 pulsars in the globular cluster 47 Tucanae using observations from the MeerKAT radio telescope at UHF-band (544-1088 MHz) and report precise values of dispersion measure (DM) and rotation measure (RM). We use these measurements to investigate the presence of turbulence in electron density and magnetic fields. The structure function of DM shows a break at $\sim 30$ arcsec ($\sim 0.6$ pc at the distance of 47 Tucanae) that suggests the presence of turbulence in the gas in the cluster driven by the motion of wind-shedding stars. On the other hand, the structure function of RM does not show evidence of a break. This non-detection could be explained either by the limited number of pulsars or by the effects of the intervening gas in the Galaxy along the line of sight. Future pulsar discoveries in the cluster could help confirm the presence and localise the turbulence.
